EP0776689A1 - Mixing device - Google Patents

Mixing device Download PDF

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Publication number
EP0776689A1
EP0776689A1 EP96810767A EP96810767A EP0776689A1 EP 0776689 A1 EP0776689 A1 EP 0776689A1 EP 96810767 A EP96810767 A EP 96810767A EP 96810767 A EP96810767 A EP 96810767A EP 0776689 A1 EP0776689 A1 EP 0776689A1
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EP
European Patent Office
Prior art keywords
partition
edge
vortex
partial
mixing device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96810767A
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German (de)
French (fr)
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EP0776689B1 (en
Inventor
Adnan Dr. Eroglu
Wolfgang Dr. Polifke
Peter Dr. Senior
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Switzerland GmbH
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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Publication of EP0776689A1 publication Critical patent/EP0776689A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4317—Profiled elements, e.g. profiled blades, bars, pillars, columns or chevrons
    • B01F25/43172—Profiles, pillars, chevrons, i.e. long elements having a polygonal cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431971—Mounted on the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/20—Heat transfer, e.g. cooling
    • F05B2260/221—Improvement of heat transfer
    • F05B2260/222—Improvement of heat transfer by creating turbulence

Definitions

  • the invention relates to a mixing device for mixing two or more fluids, which may have the same or different mass flow, the fluids to be mixed flowing along a partition wall, at the downstream end of which a plurality of vortex generators with freely flowing surfaces are arranged, of which several are arranged side by side, the side surfaces of the vortex generator being flush with one side of the partition and enclosing the arrow angle with one another, the longitudinal edges of the side surfaces being at an angle of incidence to the wall and the two side surfaces comprising a connecting edge with one another, which is preferably perpendicular to the wall and is the edge first hit by the flow.
  • Such mixing devices are known, for example, from EP-A1-0 619 134. In many sectors, for example in chemistry, food or pharmaceutical production, etc., it is required to mix fluids intimately by the shortest route. The quality of the whole process mostly depends on the mixing quality achieved. The pressure drop on the occasion of the mixing process should remain in a "reasonable" range in order to keep the process costs low due to low pumping work.
  • the invention has for its object to improve the mixing in a mixing device of the type mentioned.
  • the advantages of the invention can be seen, inter alia, in that the introduction of the rear edges twisted relative to the partition wall extends the downstream edge of the partition wall. On the one hand, this increases the contact area of the streams to be mixed, and on the other hand, further eddies are generated by the trailing edges in the flow. These vortices support and reinforce the vortices of the vortex generator generated on the longitudinal edges. In addition, the mixing of the streams to be mixed is increased because the vortices propagate in the direction of the opposite stream, which creates a woven flow pattern.
  • the vortex generator element From a fluidic point of view, the vortex generator element has a very low pressure loss when flowing around, and it generates vortices without a dead water area. Finally, due to its generally hollow interior, the element can be cooled in a variety of ways and with various means.
  • the two side surfaces including the arrow angle ⁇ and the partial roof surfaces of the vortex generator are arranged symmetrically to a plane of symmetry, formed by an axis of symmetry and the connecting edge of the side surfaces. This creates swirls of equal swirl.
  • a vortex generator 9 essentially consists of several triangular surfaces with free flow. These are two partial roof surfaces 1, 2, two side surfaces 11, 13 and two partial floor surfaces not visible in FIG. 1. In their longitudinal extension, these surfaces run at certain angles in the direction of flow.
  • the two side surfaces 11 and 13 are each perpendicular to the associated upper side 21 of a partition wall 22, it being noted that this is not mandatory.
  • the side surfaces 11, 13, which consist of right-angled triangles, are fixed here with their longer catheter on the partition wall 22. They are oriented in such a way that they form a joint with their shorter cathete, including an arrow angle ⁇ .
  • the joint is designed as a sharp connecting edge 16 and is also perpendicular to the partition wall 22. Installed in a duct, the flow cross-section is hardly affected by blocking because of the sharp connecting edge.
  • An intersection 8 is formed by the longer cathets of the side surfaces 11, 13 and by the connecting edge 16, which lies in the partition.
  • the two side surfaces 11, 13 including the arrow angle ⁇ are symmetrical in shape, size and orientation and are arranged on both sides of a plane of symmetry which is formed by an axis of symmetry 17 and the connecting edge 16.
  • the axis of symmetry 17 is usually aligned in the same way as the channel axis and thus like the channel flow.
  • An essentially longitudinal edge 12 of the partial roof surface 1 is flush with the hypotenuse of the side surface 11, which protrudes into the flow channel. This longitudinal edge 12 runs at an angle of incidence ⁇ to the wall 22.
  • One downstream lying rear edge 5 of the partial roof surface 1 lies in a plane perpendicular to the axis of symmetry 17 and is rotated by an angle ⁇ with respect to the partition wall 22, so that the rear edge 5 comes to lie below the partition wall.
  • slots must therefore be made in the partition 22, or the partition must be adapted accordingly.
  • the partial roof surface 2 is symmetrical with respect to the partial roof surface with respect to the plane of symmetry, formed by the axis of symmetry 17 and the connecting edge 16.
  • a longitudinal edge 14 of the partial roof surface 2 is flush with the hypothenus of the side surface 13 protruding into the flow channel Angle of attack ⁇ to the wall 22.
  • a rear edge 6 of the partial roof surface 2 also lies in the plane perpendicular to the axis of symmetry 17 and is rotated by the negative angle ⁇ relative to the partition wall, so that the rear edge 6 comes to lie below the partition wall 22.
  • the second longitudinal edge of the partial roof surface 1 forms with the second longitudinal edge of the partial roof surface 2 a connecting edge 10 which lies in the plane of symmetry formed by the axis of symmetry 17 and the connecting edge 16.
  • the connecting edge 10 forms with the trailing edge 5 and with the trailing edge 6 a tip 7 located at the downstream end of the vortex generator 9.
  • the longitudinal edges 12, 14 together with the connecting edge 16 and the connecting edge 10 form a tip 18 located at the upstream end of the vortex generator 9.
  • the triangular partial floor surface 3 is defined by the rear edge 5 and the intersection 8
  • the triangular partial floor surface 4 is defined by the rear edge 6 and the intersection 8.
  • a connecting edge 30 of the partial floor surfaces 3, 4 extends thus from tip 7 to intersection 8.
  • the vortex generator can also be manufactured without floor surfaces, with the partition then taking over the function of the floor surfaces.
  • the partition wall must be jagged at its downstream end, corresponding to the partial floor areas.
  • the trailing edges of the vortex generator can also lie in different planes that are not perpendicular to the axis of symmetry.
  • a vortex generator 9 ' is arranged next to one another on the underside 20 of the partition wall 22 and a vortex generator 9 on the top side 21 of the partition wall.
  • the vortex generator 9 ' is identical in shape and size to the vortex generator 9, the designations already used above for the vortex generator 9 are therefore also used for the vortex generator 9', but are provided with an apostrophe.
  • the vortex generator 9 can be transferred into the vortex generator 9 'by a rotation of 180 ° about an axis of rotation 19.
  • the axis of rotation 19 lies in the partition wall 22, is parallel to the axis of symmetry 17 and passes through the intersection of the longitudinal edge 14 and the rear edge 6.
  • the connecting edge 16 of the two side surfaces 11, 13 always forms the upstream edge of the vortex generators 9, 9 '.
  • the sharp connecting edge 16 is the point which is first affected by the channel flow.
  • the trailing edges 5, 6, 5 ', 6' of the roof surfaces, which run transversely to the flow around the partition wall 22, are thus the edges last acted upon by the channel flow.
  • the vortex generators 9 can also be designed differently than the vortex generators 9, the vortex generators always being one of the basic configurations shown have similar geometry. This is advantageous, for example, for mixing physically different flows.
  • the vortex generator works as follows: When flowing around edges 12 and 14, the flow is converted into a pair of opposing vortices.
  • the vortex axes lie in the axis of the flow.
  • the geometry of the vortex generators is chosen so that no backflow zones arise during vortex generation.
  • the vortices of the vortex generator 9 rotate above the roof surfaces and strive towards the partition wall 22 on which the vortex generator is mounted.
  • the vortices of the vortex generator 9 'rotate below the roof surfaces and also strive towards the partition wall 22.
  • the swirl number of the vortex is determined by a corresponding choice of the angle of attack ⁇ and / or the arrow angle ⁇ .
  • the vortex strength or the number of swirls is increased and the location of the vortex breakdown (if desired at all) moves upstream into the area of the vortex generator itself.
  • these two angles are ⁇ and ⁇ determined by design and by the process itself. Only the height h of the connecting edge 16 then has to be adjusted.
  • the choice of the angle ⁇ influences the eddies in such a way that the larger the ⁇ is selected, the better the partial flows are mixed.
  • the angle ⁇ cannot be chosen to be arbitrarily large, since the pressure drop also increases with increasing ⁇ .
  • the shape of the flow around the partition wall 22 is not essential for the mode of operation of the invention is.
  • the straight shape of the partition wall 22 shown in the figures it could also be an annular or hexagonal or some other cross-sectional shape.
  • the above statement that the side surfaces are perpendicular to the wall must of course be relativized. It is important that the connecting edge 16 lying on the line of symmetry 17 is perpendicular to the corresponding wall. In the case of annular walls, the connecting edge 16 would thus be radially aligned.
  • FIG. 5 partially shows a channel with a built-in partition wall 22.
  • the cross section through which flow is divided is divided into two sub-channels with the channel heights H1 and H2 through this partition wall 22.
  • the upper side 21 of the partition wall 22 forms a channel wall of the upper channel 41
  • the lower side 20 of the partition wall 22 forms a channel wall of the lower channel 42.
  • the two channels could be flowed through by the same medium at different speeds; or it could be flowing fluids of different densities or chemical compositions that have to be mixed in the shortest possible way to a certain uniformly distributed concentration.
  • An equal number of vortex generators 9, 9 'with gaps are strung together on the two channel walls 20 and 21 of the partition.
  • the height h1 of the elements 9 and the height h2 of the elements 9 ' is, for example, approximately 90% of the associated channel heights H1 and H2.
  • the flow takes place perpendicularly out of the drawing plane in FIG. 5; the elements 9, 9 'are oriented such that the connecting edges 16 are directed against the flow.
  • the direction of rotation of the generated vortices in the region of the connecting edge is descending, ie it strives towards the respective channel wall 20, 21 on which the vortex generator is arranged.
  • the eddy currents generated on their two sides are forced into one another, resulting in the desired mixing.
  • the swirl-like vortices in the sub-channels 41, 42 combine to form a large vortex with a uniform direction of rotation.
  • the axis of rotation of this large vortex is essentially the axis of rotation 19.
  • the vortex generators 9, 9 ' can have different heights h1, h2 in the channels 41, 42 compared to the channel heights H1, H2.
  • the heights h1, h2 of the connecting edges 16, 16 'of the vortex generators 9, 9' are coordinated with the respective channel heights H1, H2 in such a way that the vortex generated immediately downstream of the vortex generator already reaches such a size that the full channel height H1 + H2 or the full height of the channel part assigned to the vortex generator is filled, which leads to a uniform distribution in the applied cross section.
  • Another criterion that can influence the ratio h / H to be selected is the pressure drop that occurs when the vortex generator flows around. It goes without saying that the pressure loss coefficient also increases with a larger ratio h / H.

Abstract

An original unit mixes fluids having identical or differing mass flow rates. Flowing along a partition wall (22), they pass freely around surfaces of several, adjacent, downstream, turbulent eddy generators (9). Sides (11, 13) of these bodies (9) are flush with one side of the partition (22). Between them, and angle ( alpha ) is included. The long edges of the body (12, 14) include an angle (θ ) with the wall (22). The sides (11, 13) share a connecting edge (16) which is perpendicular to the wall (22), forming the leading edge. The body has a roof in two sections (1, 2), terminating at the sides (11, 13), and connecting at a edge (10). The trailing edges (5, 6) of the roof sections subtend an angle ( gamma ) with the wall (22), and lie on the opposite side of it. A base has two sections (3, 4) joining at an edge (30), and connected by the rear edges (5, 6) to the roof sections.

Description

Technisches GebietTechnical field

Die Erfindung betrifft eine Mischvorrichtung zum Mischen von zwei oder mehreren Fluiden, welche den gleichen oder ungleichen Massenstrom aufweisen können, wobei die zu mischenden Fluide längs einer Trennwand strömen, an deren stromabwärtigem Ende mehrere frei umströmte Flächen aufweisende Wirbel-Generatoren angeordnet sind, von denen mehrere nebeneinander angeordnet sind, wobei die Seitenflächen des Wirbel-Generators mit einer Seite der Trennwand bündig sind und miteinander den Pfeilwinkel einschliessen, die längsgerichteten Kanten der Seitenflächen unter einem Anstellwinkel zur Wand verlaufen und die beiden Seitenflächen eine Verbindungskante miteinander umfassen, die vorzugsweise senkrecht zur Wand verläuft und die von der Strömung zuerst beaufschlagte Kante ist.The invention relates to a mixing device for mixing two or more fluids, which may have the same or different mass flow, the fluids to be mixed flowing along a partition wall, at the downstream end of which a plurality of vortex generators with freely flowing surfaces are arranged, of which several are arranged side by side, the side surfaces of the vortex generator being flush with one side of the partition and enclosing the arrow angle with one another, the longitudinal edges of the side surfaces being at an angle of incidence to the wall and the two side surfaces comprising a connecting edge with one another, which is preferably perpendicular to the wall and is the edge first hit by the flow.

Stand der TechnikState of the art

Derartige Mischvorrichtungen sind beispielsweise bekannt aus EP-A1-0 619 134. In vielen Sektoren wie beispielsweise in der Chemie, der Nahrungsmittel- oder Pharmaproduktion usw. wird verlangt, Fluide auf kürzestem Weg innig zu vermischen. Die Qualität des ganzen Prozesses hängt meistens von der erzielten Mischqualität ab. Dabei sollte der Druckabfall anlässlich des Mischvorgangs in "vernünftigem" Rahmen bleiben, um die Prozesskosten durch niedrige Pumparbeit klein zu halten.Such mixing devices are known, for example, from EP-A1-0 619 134. In many sectors, for example in chemistry, food or pharmaceutical production, etc., it is required to mix fluids intimately by the shortest route. The quality of the whole process mostly depends on the mixing quality achieved. The pressure drop on the occasion of the mixing process should remain in a "reasonable" range in order to keep the process costs low due to low pumping work.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zugrunde, bei einer Mischvorrichtung der eingangs genannten Art die Durchmischung zu verbessern.The invention has for its object to improve the mixing in a mixing device of the type mentioned.

Erfindungsgemäss wird dies dadurch erreicht,

  • dass eine Dachfläche aus zwei Teildachflächen besteht, wobei die längsgerichteten Kanten der Teildachflächen bündig sind mit den Kanten der Seitenflächen und die Teildachflächen über eine Verbindungskante miteinander verbunden sind,
  • dass die stromabwärts liegenden Hinterkanten der Teildachflächen mit der Trennwand einen Winkel einschliessen, wodurch die Hinterkanten in Bezug auf die Seitenflächen im wesentlichen auf die andere Seite der Trennwand zu liegen kommen,
  • und dass eine Bodenfläche aus zwei Teilbodenflächen besteht, die über eine Verbindungskante miteinander und über die Hinterkanten mit den Teildachflächen verbunden sind.
According to the invention, this is achieved by
  • that a roof surface consists of two partial roof surfaces, the longitudinal edges of the partial roof surfaces being flush with the edges of the side surfaces and the partial roof surfaces being connected to one another via a connecting edge,
  • that the downstream rear edges of the partial roof surfaces form an angle with the partition wall, as a result of which the rear edges come to lie essentially on the other side of the partition wall with respect to the side surfaces,
  • and that a floor area consists of two partial floor areas which are connected to one another via a connecting edge and to the partial roof areas via the rear edges.

Die Vorteile der Erfindung sind unter anderem darin zu sehen, dass durch die Einführung der gegenüber der Trennwand verdrehten Hinterkanten die stromabwärtige Kante der Trennwand verlängert wird. Dadurch wird zum einen die Kontaktfläche der zu mischenden Ströme erhöht, zum anderen werden durch die in der Strömung angestellten Hinterkanten weitere Wirbel erzeugt. Diese Wirbel unterstützen und verstärken die an den längsgerichteten Kanten erzeugten Wirbel des Wirbelgenerators. Zudem wird die Durchmischung der zu mischenden Ströme erhöht, da die Wirbel in Richtung des jeweils gegenüberliegenden Stromes propagieren, wodurch ein verwobenes Strömungsmuster entsteht.The advantages of the invention can be seen, inter alia, in that the introduction of the rear edges twisted relative to the partition wall extends the downstream edge of the partition wall. On the one hand, this increases the contact area of the streams to be mixed, and on the other hand, further eddies are generated by the trailing edges in the flow. These vortices support and reinforce the vortices of the vortex generator generated on the longitudinal edges. In addition, the mixing of the streams to be mixed is increased because the vortices propagate in the direction of the opposite stream, which creates a woven flow pattern.

Vom strömungstechnischen Standpunkt her weist das Wirbelgenerator-Element beim Umströmen einen sehr geringen Druckverlust auf und es erzeugt Wirbel ohne Totwassergebiet. Schliesslich kann das Element durch seinen in der Regel hohlen Innenraum auf die verschiedensten Arten und mit diversen Mitteln gekühlt werden.From a fluidic point of view, the vortex generator element has a very low pressure loss when flowing around, and it generates vortices without a dead water area. Finally, due to its generally hollow interior, the element can be cooled in a variety of ways and with various means.

Es ist besonders zweckmässig, wenn die beiden den Pfeilwinkel α einschliessenden Seitenflächen sowie die Teildachflächen des Wirbel-Generators symmetrisch zu einer Symmetrieebene, gebildet durch eine Symmetrieachse und die Verbindungskante der Seitenflächen angeordnet sind. Damit werden drallgleiche Wirbel erzeugt.It is particularly expedient if the two side surfaces including the arrow angle α and the partial roof surfaces of the vortex generator are arranged symmetrically to a plane of symmetry, formed by an axis of symmetry and the connecting edge of the side surfaces. This creates swirls of equal swirl.

Kurze Beschreibung der ZeichnungBrief description of the drawing

In den Zeichnungen ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt.In the drawings, an embodiment of the invention is shown schematically.

Es zeigen:

Fig. 1
eine perspektivische Darstellung eines Wirbelgenerators, Sicht von oben;
Fig. 2
eine perspektivische Darstellung des Wirbelgenerators, Sicht von unten;
Fig. 3
eine perspektivische Darstellung mehrerer Wirbelgeneratoren;
Fig. 4
Draufsicht auf die Wirbelgeneratoren von Fig.3;
Fig. 5
Teilquerschnitt durch einen Kanal mit darin angeordneten Wirbelgeneratoren.
Show it:
Fig. 1
a perspective view of a vortex generator, view from above;
Fig. 2
a perspective view of the vortex generator, view from below;
Fig. 3
a perspective view of several vortex generators;
Fig. 4
Top view of the vortex generators of Figure 3;
Fig. 5
Partial cross section through a channel with vortex generators arranged in it.

Es sind nur die für das Verständnis der Erfindung wesentlichen Elemente gezeigt.Only the elements essential for understanding the invention are shown.

Weg zur Ausführung der ErfindungWay of carrying out the invention

Nach Fig. 1 besteht ein Wirbel-Generator 9 im wesentlichen aus mehreren frei umströmten dreieckigen Flächen. Es sind dies zwei Teil-Dachflächen 1, 2, zwei Seitenflächen 11, 13 und zwei in der Figur 1 nicht sichtbare Teil-Bodenflächen. In ihrer Längserstreckung verlaufen diese Flächen unter bestimmten Winkeln in Strömungsrichtung.According to FIG. 1, a vortex generator 9 essentially consists of several triangular surfaces with free flow. These are two partial roof surfaces 1, 2, two side surfaces 11, 13 and two partial floor surfaces not visible in FIG. 1. In their longitudinal extension, these surfaces run at certain angles in the direction of flow.

Die beiden Seitenflächen 11 und 13 stehen jeweils senkrecht auf der zugehörigen Oberseite 21 einer Trennwand 22, wobei angemerkt wird, dass dies nicht zwingend ist. Die Seitenflächen 11, 13, welche aus rechtwinkligen Dreiecken bestehen, sind hier mit ihrer längeren Kathete auf der Trennwand 22 fixiert. Sie sind so orientiert, dass sie mit ihrer kürzeren Kathete einen Stoss bilden unter Einschluss eines Pfeilwinkels α. Der Stoss ist als scharfe Verbindungskante 16 ausgeführt und steht ebenfalls senkrecht zur Trennwand 22. In einem Kanal eingebaut, wird wegen der scharfen Verbindungskante der Durchströmquerschnitt kaum durch Sperrung beeinträchtigt. Durch die längeren Katheten der Seitenflächen 11, 13 und durch die Verbindungskante 16 wird ein Schnittpunkt 8 gebildet, der in der Trennwand liegt. Die beiden den Pfeilwinkel α einschliessenden Seitenflächen 11, 13 sind symmetrisch in Form, Grösse und Orientierung und sind beidseitig einer Symmetrieebene angeordnet, welche durch eine Symmetrieachse 17 und die Verbindungskante 16 gebildet wird. Die Symmetrieachse 17 ist üblicherweise gleichgerichtet wie die Kanalachse und damit wie die Kanalströmung.The two side surfaces 11 and 13 are each perpendicular to the associated upper side 21 of a partition wall 22, it being noted that this is not mandatory. The side surfaces 11, 13, which consist of right-angled triangles, are fixed here with their longer catheter on the partition wall 22. They are oriented in such a way that they form a joint with their shorter cathete, including an arrow angle α. The joint is designed as a sharp connecting edge 16 and is also perpendicular to the partition wall 22. Installed in a duct, the flow cross-section is hardly affected by blocking because of the sharp connecting edge. An intersection 8 is formed by the longer cathets of the side surfaces 11, 13 and by the connecting edge 16, which lies in the partition. The two side surfaces 11, 13 including the arrow angle α are symmetrical in shape, size and orientation and are arranged on both sides of a plane of symmetry which is formed by an axis of symmetry 17 and the connecting edge 16. The axis of symmetry 17 is usually aligned in the same way as the channel axis and thus like the channel flow.

Eine im wesentlichen längsgerichtete Kante 12 der Teil-Dachfläche 1 ist bündig mit der in den Strömungskanal hineinragenden Hypothenuse der Seitenfläche 11. Diese Längskante 12 verläuft unter einem Anstellwinkel θ zur Wand 22. Eine stromabwärts liegende Hinterkante 5 der Teildachfläche 1 liegt in einer Ebene senkrecht zur Symmetrieachse 17 und ist um einen Winkel γ gegenüber der Trennwand 22 verdreht, so dass die Hinterkante 5 unterhalb der Trennwand zu liegen kommt. Zur Montage des Wirbelgenerators 9 müssen deshalb Schlitze in der Trennwand 22 angebracht werden, oder die Trennwand muss entsprechend angepasst werden.
Die Teildachfläche 2 ist symmetrisch zur Teildachfläche bezüglich der Symmetriebene, gebildet durch die Symmetrieachse 17 und die Verbindungskante 16. Somit ist eine längsgerichtete Kanten 14 der Teil-Dachfläche 2 bündig mit der in den Strömungskanal hineinragenden Hypothenuse der Seitenfläche 13. Die Längskante 14 verläuft unter dem Anstellwinkel θ zur Wand 22. Eine Hinterkante 6 der Teildachfläche 2 liegt ebenfalls in der Ebene senkrecht zur Symmetrieachse 17 und ist um den negativen Winkel γ gegenüber der Trennwand verdreht, so dass die Hinterkante 6 unterhalb der Trennwand 22 zu liegen kommt.
Die zweite längsgerichtete Kante der Teil-Dachfläche 1 bildet mit der zweiten längsgerichteten Kante der Teil-Dachfläche 2 eine Verbindungskante 10, die in der durch die Symmetrieachse 17 und die Verbindungskante 16 gebildeten Symmetrieebene liegt. Die Verbindungskante 10 bildet mit der Hinterkante 5 sowie mit der Hinterkante 6 eine am stromabwärtigen Ende des Wirbelgenerators 9 liegende Spitze 7. Die Längskanten 12, 14 bilden zusammen mit der Verbindungskante 16 sowie der Verbindungskante 10 eine am stromaufwärtigen Ende des Wirbelgenerators 9 liegende Spitze 18.An essentially longitudinal edge 12 of the partial roof surface 1 is flush with the hypotenuse of the side surface 11, which protrudes into the flow channel. This longitudinal edge 12 runs at an angle of incidence θ to the wall 22. One downstream lying rear edge 5 of the partial roof surface 1 lies in a plane perpendicular to the axis of symmetry 17 and is rotated by an angle γ with respect to the partition wall 22, so that the rear edge 5 comes to lie below the partition wall. To assemble the vortex generator 9, slots must therefore be made in the partition 22, or the partition must be adapted accordingly.
The partial roof surface 2 is symmetrical with respect to the partial roof surface with respect to the plane of symmetry, formed by the axis of symmetry 17 and the connecting edge 16. Thus, a longitudinal edge 14 of the partial roof surface 2 is flush with the hypothenus of the side surface 13 protruding into the flow channel Angle of attack θ to the wall 22. A rear edge 6 of the partial roof surface 2 also lies in the plane perpendicular to the axis of symmetry 17 and is rotated by the negative angle γ relative to the partition wall, so that the rear edge 6 comes to lie below the partition wall 22.
The second longitudinal edge of the partial roof surface 1 forms with the second longitudinal edge of the partial roof surface 2 a connecting edge 10 which lies in the plane of symmetry formed by the axis of symmetry 17 and the connecting edge 16. The connecting edge 10 forms with the trailing edge 5 and with the trailing edge 6 a tip 7 located at the downstream end of the vortex generator 9. The longitudinal edges 12, 14 together with the connecting edge 16 and the connecting edge 10 form a tip 18 located at the upstream end of the vortex generator 9.

Nach Fig. 2 wird die dreieckige Teil-Bodenflächen 3 definiert durch die Hinterkante 5 und den Schnittpunkt 8, die dreieckige Teil-Bodenflächen 4 wird definiert durch die Hinterkante 6 und den Schnittpunkt 8. Eine Verbindungskante 30 der Teil-Bodenflächen 3, 4 erstreckt sich somit von der Spitze 7 bis zum Schnittpunkt 8.2, the triangular partial floor surface 3 is defined by the rear edge 5 and the intersection 8, the triangular partial floor surface 4 is defined by the rear edge 6 and the intersection 8. A connecting edge 30 of the partial floor surfaces 3, 4 extends thus from tip 7 to intersection 8.

Selbstverständlich kann der Wirbel-Generator auch ohne Bodenflächen hergestellt werden, wobei dann die Trennwand die Funktion der Bodenflächen übernimmt. Dazu muss die Trennwand an ihrem stromabwärtigen Ende gezackt ausgeformt werden, entsprechend den Teil-Bodenflächen. Um die Kontaktfläche am stromabwärtigen Ende der Trennwand weiter zu erhöhen, können die Hinterkanten des Wirbelgenerators auch in verschiedenen Ebenen liegen, die nicht senkrecht zur Symmetrieachse verlaufen.Of course, the vortex generator can also be manufactured without floor surfaces, with the partition then taking over the function of the floor surfaces. For this purpose, the partition wall must be jagged at its downstream end, corresponding to the partial floor areas. In order to further increase the contact area at the downstream end of the partition, the trailing edges of the vortex generator can also lie in different planes that are not perpendicular to the axis of symmetry.

In Fig. 3 und Fig. 4 ist ein Wirbelgenerator 9' auf der Unterseite 20 der Trennwand 22 und ein Wirbelgenerator 9 auf der Oberseite 21 der Trennwand nebeneinander angeordnet. Der Wirbelgenerator 9' ist in Form und Grösse identisch mit dem Wirbelgenerator 9, die bereits oben verwendeten Bezeichnungen für den Wirbelgenerator 9 werden deshalb auch für den Wirbel-generator 9' verwendet, sind jedoch mit einem Apostroph versehen. Der Wirbelgenerator 9 kann durch eine Drehung von 180° um eine Drehachse 19 in den Wirbelgenerator 9' überführt werden. Die Drehachse 19 liegt in der Trennwand 22, ist parallel zur Symmetrieachse 17 und geht durch den Schnittpunkt von Längskante 14 und Hinterkante 6.In FIGS. 3 and 4, a vortex generator 9 'is arranged next to one another on the underside 20 of the partition wall 22 and a vortex generator 9 on the top side 21 of the partition wall. The vortex generator 9 'is identical in shape and size to the vortex generator 9, the designations already used above for the vortex generator 9 are therefore also used for the vortex generator 9', but are provided with an apostrophe. The vortex generator 9 can be transferred into the vortex generator 9 'by a rotation of 180 ° about an axis of rotation 19. The axis of rotation 19 lies in the partition wall 22, is parallel to the axis of symmetry 17 and passes through the intersection of the longitudinal edge 14 and the rear edge 6.

Die Verbindungskante 16 der beiden Seitenflächen 11, 13 bildet immer die stromaufwärtige Kante der Wirbel-Generatoren 9, 9'. Die scharfe Verbindungskante 16 ist jene Stelle, die von der Kanalströmung zuerst beaufschlagt wird. Die quer zur umströmten Trennwand 22 verlaufenden Hinterkanten 5, 6, 5', 6' der Dachflächen sind somit die von der Kanalströmung zuletzt beaufschlagten Kanten.The connecting edge 16 of the two side surfaces 11, 13 always forms the upstream edge of the vortex generators 9, 9 '. The sharp connecting edge 16 is the point which is first affected by the channel flow. The trailing edges 5, 6, 5 ', 6' of the roof surfaces, which run transversely to the flow around the partition wall 22, are thus the edges last acted upon by the channel flow.

Selbstverständlich können die Wirbelgeneratoren 9' auch anders als die Wirbelgeneratoren 9 ausgestaltet werden, wobei die Wirbelgeneratoren immer eine der gezeigten Grundkonfiguration ähnliche Geometrie aufweisen. Dies ist beispielsweise vorteilhaft zur Mischung physikalisch unterschiedlicher Strömungen.Of course, the vortex generators 9 'can also be designed differently than the vortex generators 9, the vortex generators always being one of the basic configurations shown have similar geometry. This is advantageous, for example, for mixing physically different flows.

Die Wirkungsweise des Wirbel-Generators ist folgende: Beim Umströmen der Kanten 12 und 14 wird die Strömung in ein Paar gegenläufiger Wirbel umgewandelt. Die Wirbelachsen liegen in der Achse der Strömung. Die Geometrie der Wirbel-Generatoren ist so gewählt, dass bei der Wirbelerzeugung keine Rückströmzonen entstehen. Die Wirbel des Wirbelgenerators 9 rotieren oberhalb der Dachflächen entlang und streben der Trennwand 22 zu, auf welcher der Wirbel-Generator montiert ist. Die Wirbel des Wirbelgenerators 9' rotieren unterhalb der Dachflächen entlang und streben ebenfalls der Trennwand 22 zu.The vortex generator works as follows: When flowing around edges 12 and 14, the flow is converted into a pair of opposing vortices. The vortex axes lie in the axis of the flow. The geometry of the vortex generators is chosen so that no backflow zones arise during vortex generation. The vortices of the vortex generator 9 rotate above the roof surfaces and strive towards the partition wall 22 on which the vortex generator is mounted. The vortices of the vortex generator 9 'rotate below the roof surfaces and also strive towards the partition wall 22.

Die Drallzahl des Wirbels wird bestimmt durch entsprechende Wahl des Anstellwinkels θ und/oder des Pfeilwinkels α. Mit steigenden Winkeln wird die Wirbelstärke bzw. die Drallzahl erhöht und der Ort des Wirbelaufplatzens (vortex break down) - sofern dies überhaupt gewünscht ist - wandert stromaufwärts bis hin in den Bereich des Wirbel-Generators selbst. Je nach Anwendung sind diese beiden Winkel θ und α durch konstruktive Gegebenheiten und durch den Prozess selbst vorgegeben. Angepasst werden muss dann nur noch die Höhe h der Verbindungskante 16. Durch die Wahl des Winkels γ werden die Wirbel so beeinflusst, dass je grösser γ gewählt wird, desto besser die Durchmischung der Teilströme erfolgt. Der Winkel γ kann jedoch nicht beliebig gross gewählt werden, da mit grösser werdendem γ auch der Druckabfall ansteigt.The swirl number of the vortex is determined by a corresponding choice of the angle of attack θ and / or the arrow angle α. With increasing angles, the vortex strength or the number of swirls is increased and the location of the vortex breakdown (if desired at all) moves upstream into the area of the vortex generator itself. Depending on the application, these two angles are θ and α determined by design and by the process itself. Only the height h of the connecting edge 16 then has to be adjusted. The choice of the angle γ influences the eddies in such a way that the larger the γ is selected, the better the partial flows are mixed. However, the angle γ cannot be chosen to be arbitrarily large, since the pressure drop also increases with increasing γ.

Es wird darauf hingewiesen, dass die Form der umströmten Trennwand 22 für die Wirkungsweise der Erfindung nicht wesentlich ist. Statt der in den Figuren gezeigten geraden Form der Trennwand 22 könnte es sich auch um eine ringförmige oder hexagonale oder eine sonstige Querschnittsform handeln. Bei einer gekrümmten Trennwand muss die obige Aussage, dass die Seitenflächen senkrecht auf der Wand stehen, selbstverständlich relativiert werden. Massgebend ist, dass die auf der Symmetrielinie 17 liegende Verbindungskante 16 senkrecht auf der entsprechenden Wand steht. Im Fall von ringförmigen Wänden würde die Verbindungskante 16 somit radial ausgerichtet sein.It is pointed out that the shape of the flow around the partition wall 22 is not essential for the mode of operation of the invention is. Instead of the straight shape of the partition wall 22 shown in the figures, it could also be an annular or hexagonal or some other cross-sectional shape. In the case of a curved partition, the above statement that the side surfaces are perpendicular to the wall must of course be relativized. It is important that the connecting edge 16 lying on the line of symmetry 17 is perpendicular to the corresponding wall. In the case of annular walls, the connecting edge 16 would thus be radially aligned.

Die Fig. 5 zeigt teilweise einen Kanal mit eingebauter Trennwand 22. Der durchströmte Querschnitt ist durch diese Trennwand 22 in zwei Teilkanäle mit den Kanalhöhen H1 und H2 unterteilt. Die Oberseite 21 der Trennwand 22 bildet eine Kanalwand des oberen Kanals 41, die Unterseite 20 der Trennwand 22 bildet eine Kanalwand des unteren Kanals 42. Die beiden Kanäle könnten von einem gleichen Medium mit unterschiedlichen Geschwindigkeit durchströmt sein; oder es könnte sich um strömende Fluide unterschiedlicher Dichte oder chemischer Zusammensetzung handeln, die auf kürzestem Wege zu einer bestimmten gleichmässig verteilter Konzentration vermischt werden müssen.FIG. 5 partially shows a channel with a built-in partition wall 22. The cross section through which flow is divided is divided into two sub-channels with the channel heights H1 and H2 through this partition wall 22. The upper side 21 of the partition wall 22 forms a channel wall of the upper channel 41, the lower side 20 of the partition wall 22 forms a channel wall of the lower channel 42. The two channels could be flowed through by the same medium at different speeds; or it could be flowing fluids of different densities or chemical compositions that have to be mixed in the shortest possible way to a certain uniformly distributed concentration.

An den beiden Kanalwänden 20 und 21 der Trennwand ist jeweils eine gleiche Anzahl von Wirbel-Generatoren 9, 9' mit Zwischenräumen aneinandergereiht. Die Höhe h1 der Elemente 9 sowie dei Höhe h2 der Elemente 9' beträgt beispielsweise ca. 90% der zugehörigen Kanalhöhen H1 und H2. Die Strömung erfolgt in Fig. 5 senkrecht aus der Zeichenebene heraus; die Elemente 9, 9' sind so orientiert, dass die Verbindungskanten 16 gegen die Strömung gerichtet sind. Der Drehsinn der erzeugten Wirbel im Bereich der Verbindungskante ist absteigend, d.h. er strebt der jeweiligen Kanal-Wand 20, 21 zu, auf der der Wirbel-Generator angeordnet ist. Am Ende der Trennwand 22, d.h. an den Hinterkanten 5, 6, 5', 6', werden die auf deren beiden Seiten erzeugten Wirbelströme ineinandergezwängt, wobei es zu der gewünschten Durchmischung kommt.An equal number of vortex generators 9, 9 'with gaps are strung together on the two channel walls 20 and 21 of the partition. The height h1 of the elements 9 and the height h2 of the elements 9 'is, for example, approximately 90% of the associated channel heights H1 and H2. The flow takes place perpendicularly out of the drawing plane in FIG. 5; the elements 9, 9 'are oriented such that the connecting edges 16 are directed against the flow. The direction of rotation of the generated vortices in the region of the connecting edge is descending, ie it strives towards the respective channel wall 20, 21 on which the vortex generator is arranged. At the end of the partition 22, ie at the rear edges 5, 6, 5 ', 6', the eddy currents generated on their two sides are forced into one another, resulting in the desired mixing.

Die drallgleichen Wirbel in den Teilkanälen 41, 42 kombinieren sich zu einem grossen Wirbel mit einheitlichem Drehsinn. Die Drehachse dieses grossen Wirbels ist im wesentlichen die Drehachse 19.The swirl-like vortices in the sub-channels 41, 42 combine to form a large vortex with a uniform direction of rotation. The axis of rotation of this large vortex is essentially the axis of rotation 19.

Die Wirbel-Generatoren 9, 9' können in den Kanälen 41, 42 unterschiedliche Höhen h1, h2 gegenüber den Kanalhöhen H1, H2 aufweisen. In der Regel wird man die Höhen h1, h2 der Verbindungskanten 16, 16' der Wirbelgeneratoren 9, 9' so mit den jeweiligen Kanalhöhen H1, H2 abstimmen, dass der erzeugte Wirbel unmittelbar stromabwärts des Wirbel-Generators bereits eine solche Grösse erreicht, dass die volle Kanalhöhe H1+H2 oder die volle Höhe des dem Wirbel-Generators zugeordneten Kanalteils ausgefüllt wird, was zu einer gleichmässigen Verteilung in dem beaufschlagten Querschnitt führt. Ein weiteres Kriterium, welches Einfluss auf das zu wählende Verhältnis h/H nehmen kann, ist der Druckabfall, der beim Umströmen des Wirbel-Generators auftritt. Es versteht sich, dass mit grösserem Verhältnis h/H auch der DrucKverlustbeiwert ansteigt.The vortex generators 9, 9 'can have different heights h1, h2 in the channels 41, 42 compared to the channel heights H1, H2. As a rule, the heights h1, h2 of the connecting edges 16, 16 'of the vortex generators 9, 9' are coordinated with the respective channel heights H1, H2 in such a way that the vortex generated immediately downstream of the vortex generator already reaches such a size that the full channel height H1 + H2 or the full height of the channel part assigned to the vortex generator is filled, which leads to a uniform distribution in the applied cross section. Another criterion that can influence the ratio h / H to be selected is the pressure drop that occurs when the vortex generator flows around. It goes without saying that the pressure loss coefficient also increases with a larger ratio h / H.

Selbstverständlich ist die Erfindung nicht nur auf die gezeigten und beschriebenen Ausführungs- und Anwendungsbeispiele beschränkt. Durch gezielte Auslegung und Dimensionierung der Wirbel-Generatoren hat man bei gegebenen Strömungen ein einfaches Mittel an der Hand, je nach Bedarf den Mischvorgang zu steuern.Of course, the invention is not only limited to the exemplary embodiments and examples shown and described. Through the targeted design and dimensioning of the vortex generators, given given flows, you have a simple means of controlling the mixing process as required.

BezugszeichenlisteReference list

11
Teil-DachflächePartial roof area
22nd
Teil-DachflächePartial roof area
33rd
Teil-BodenflächePartial floor area
44th
Teil-BodenflächePartial floor area
55
Hinterkante von 1 und 3Trailing edge of 1 and 3
66
Hinterkante von 2 und 4Trailing edge of 2 and 4
77
Spitzetop
88th
SchnittpunktIntersection
99
WirbelgeneratorVortex generator
9'9 '
Wirbelgenerator an der Unterseite von 22Vortex generator at the bottom of 22
1010th
VerbindungskanteConnecting edge
1111
SeitenflächeSide surface
1212th
LängskanteLong edge
1313
SeitenflächeSide surface
1414
LängskanteLong edge
1616
VerbindungskanteConnecting edge
1717th
SymmetrieachseAxis of symmetry
1818th
Spitzetop
1919th
DrehachseAxis of rotation
2020th
Oberseite von 22Top of 22
2121
Unterseite von 22Bottom of 22
2222
Trennwandpartition wall
3030th
VerbindungskanteConnecting edge
4141
oberer Kanalupper channel
4242
unterer Kanallower channel
αα
PfeilwinkelArrow angle
γγ
Winkel von 4 und 5 zu 22Angle from 4 and 5 to 22
θθ
AnstellwinkelAngle of attack
h1h1
Höhe Verbindungskante 16Connection edge height 16
h2h2
Höhe Verbindungskante 16'Connection edge height 16 '
H1H1
Höhe Kanal 41Height channel 41
H2H2
Höhe Kanal 42Height channel 42

Claims (7)

Mischvorrichtung zum Mischen von zwei oder mehreren Fluiden, welche den gleichen oder ungleichen Massenstrom aufweisen können, wobei die zu mischenden Fluide längs einer Trennwand (22) strömen, an deren stromabwärtigem Ende mehrere frei umströmte Flächen aufweisende Wirbel-Generatoren (9, 9') angeordnet sind, von denen mehrere nebeneinander angeordnet sind, wobei die Seitenflächen (11, 13) des Wirbel-Generators mit einer Seite der Trennwand (22) bündig sind und miteinander den Pfeilwinkel (α) einschliessen, die längsgerichteten Kanten (12, 14) der Seitenflächen unter einem Anstellwinkel (θ) zur Wand (22) verlaufen und die beiden Seitenflächen (11, 13) eine Verbindungskante (16) miteinander umfassen, die vorzugsweise senkrecht zur Wand (22) verläuft und die von der Strömung zuerst beaufschlagte Kante (16) ist,
dadurch gekennzeichnet, dass eine Dachfläche aus zwei Teildachflächen (1, 2) besteht, wobei die längsgerichteten Kanten der Teildachflächen (1, 2) bündig sind mit den Kanten (12, 14) der Seitenflächen (11, 13) und die Teildachflächen über eine Verbindungskante (10) miteinander verbunden sind, dass die stromabwärts liegenden Hinterkanten (5, 6) der Teildachflächen (1, 2) mit der Trennwand (22) einen Winkel (γ) einschliessen, wodurch die Hinterkanten (5, 6) in Bezug auf die Seitenflächen (11, 13) im wesentlichen auf die andere Seite der Trennwand (22) zu liegen kommen, und dass eine Bodenfläche aus zwei Teilbodenflächen (3, 4) besteht, die über eine Verbindungskante (30) miteinander und über die Hinterkanten (5, 6) mit den Teildachflächen verbunden sind. Mixing device for mixing two or more fluids, which may have the same or different mass flow, the fluids to be mixed flowing along a partition wall (22), at the downstream end of which a plurality of vortex generators (9, 9 ') with freely flowing surfaces are arranged are, of which several are arranged side by side, the side surfaces (11, 13) of the vortex generator being flush with one side of the partition (22) and including the arrow angle (α), the longitudinal edges (12, 14) of the side surfaces run at an angle of incidence (θ) to the wall (22) and the two side surfaces (11, 13) comprise a connecting edge (16) with one another, which preferably runs perpendicular to the wall (22) and which is the edge (16) which is first acted upon by the flow ,
characterized, that a roof surface consists of two partial roof surfaces (1, 2), the longitudinal edges of the partial roof surfaces (1, 2) being flush with the edges (12, 14) of the side surfaces (11, 13) and the partial roof surfaces via a connecting edge (10) are interconnected that the downstream rear edges (5, 6) of the partial roof surfaces (1, 2) form an angle (γ) with the partition wall (22), whereby the rear edges (5, 6) essentially with respect to the side surfaces (11, 13) come to rest on the other side of the partition (22), and that a floor area consists of two partial floor areas (3, 4) which are connected to one another via a connecting edge (30) and to the partial roof areas via the rear edges (5, 6). Mischvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
dass die Bodenfläche (3, 4) die Trennwand (22) ist und dass der Wirbelgenerator (9, 9') bestehend aus zwei Seitenflächen (11, 13) und zwei Teildachflächen (1, 2) auf der Trennwand angeordnet ist.Mixing device according to claim 1,
characterized,
that the bottom surface (3, 4) is the partition (22) and that the vortex generator (9, 9 ') consisting of two side surfaces (11, 13) and two partial roof surfaces (1, 2) is arranged on the partition. Mischvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
dass die Hinterkanten (5, 6) der Teildachflächen (1, 2) in einer Ebene senkrecht zu einer Symmetrieachse (17) angeordnet sind.Mixing device according to claim 1,
characterized,
that the rear edges (5, 6) of the partial roof surfaces (1, 2) are arranged in a plane perpendicular to an axis of symmetry (17). Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die beiden den Pfeilwinkel (α) einschliessenden Seitenflächen (11, 13) sowie die Teildachflächen (1, 2) des Wirbel-Generators (9) symmetrisch zu einer Symmetrieebene, gebildet durch eine Symmetrieachse (17) und die Verbindungskante (16), angeordnet sind.Mixing device according to claim 1, characterized in that the two side surfaces (11, 13) including the arrow angle (α) and the partial roof surfaces (1, 2) of the vortex generator (9) are symmetrical to a plane of symmetry, formed by an axis of symmetry (17) and the connecting edge (16) are arranged. Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Verbindungskante (16) und/oder die längsgerichteten Kanten (12, 14) der Dachfläche zumindest annähernd scharf ausgebildet sind.Mixing device according to claim 1, characterized in that the connecting edge (16) and / or the longitudinal edges (12, 14) of the roof surface are at least approximately sharp. Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Trennwand (22) in einem doppelkanaligen Behältnis angeordnet ist unter Bildung von zwei Teilkanälen (41,42), und dass in jedem Teilkanal die gleiche Anzahl von Wirbel-Generatoren (9, 9') angeordnet ist, und dass die Wirbel-Generatoren beidseitig an der Trennwand (22) befestigt sind.Mixing device according to claim 1, characterized in that the partition (22) is arranged in a double-channel container to form two sub-channels (41, 42), and that the same number of vortex generators (9, 9 ') is arranged in each sub-channel is, and that the vortex generators are attached to the partition (22) on both sides. Mischvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Verhältnis Höhe (h1, h2) des Wirbel-Generators (9, 9') zur Höhe (H1, H2) des Teilkanals (41, 42) so gewählt ist, dass der erzeugte Wirbel unmittelbar stromabwärts des Wirbel-Generators die volle Teilkanalhöhe (H1, H2) oder die volle Höhe des Kanals (H1+H2) ausfüllt.Mixing device according to claim 6, characterized in that the ratio height (h1, h2) of the vortex generator (9, 9 ') to the height (H1, H2) of the sub-channel (41, 42) is selected such that the vortex generated is immediate fills the full subchannel height (H1, H2) or the full height of the channel (H1 + H2) downstream of the vortex generator.
EP96810767A 1995-12-01 1996-11-11 Mixing device Expired - Lifetime EP0776689B1 (en)

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Also Published As

Publication number Publication date
DE19544816A1 (en) 1997-06-05
US5803602A (en) 1998-09-08
JPH09173808A (en) 1997-07-08
DE59607626D1 (en) 2001-10-11
EP0776689B1 (en) 2001-09-05

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