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CN-122029343-A - Flow device, internal combustion engine and method for converging two fluid flows by means of such a flow device

CN122029343ACN 122029343 ACN122029343 ACN 122029343ACN-122029343-A

Abstract

The invention relates to a flow device (3) having a flow junction section (15) for converging two fluid flows (11.1, 11.2), wherein the flow junction section (15) has a first inflow region (17.1) for a first fluid flow (11.1) and a second inflow region (17.2) for a second fluid flow (11.2), and an outflow region (19) for a total fluid flow (13) converging from the fluid flows (11.1, 11.2), wherein the inflow regions (17.1, 17.2) are connected to the outflow region (19) in a flow-technical manner by respective inflow regions (31.1, 31.2) which open into a common outflow region (19), wherein an inflow cross section of the inflow regions (31.1, 31.2) is constricted in a constriction direction (V) along a respective flow line from the inflow regions (17.1, 17.2) to the outflow region (19), wherein the inflow regions (17.1, 17.2) are arranged in the constriction direction (47) in the inflow regions (1, 17.2) in the lateral direction (51) and the outflow regions (19) are arranged at the end of the constriction region (19) in the lateral direction (47), the introduction sections (31.1, 31.2) thus converge in a converging section (49) of the outflow region (19) facing away from the inflow region (17.1, 17.2).

Inventors

  • O. Ha Xin
  • S. Kadamm
  • HARDER ROB

Assignees

  • 罗尔斯·罗伊斯解决方案有限公司

Dates

Publication Date
20260512
Application Date
20241016
Priority Date
20231017

Claims (13)

  1. 1. A flow device (3) having a flow junction section (15) for converging a first fluid flow (11.1) and a second fluid flow (11.2), wherein the flow junction section (15): -having a first inflow region (17.1) for the first fluid flow (11.1) and a second inflow region (17.2) for the second fluid flow (11.2), and Having an outflow region (19) for a total fluid flow (13) which is formed by the first fluid flow (11.1) and the second fluid flow (11.2) converging, The first inflow region (17.1) is connected to the outflow region (19) in a flow-technical manner by a first introduction section (31.1) for the flow guidance of the first fluid flow (11.1), wherein, The second inflow region (17.2) is connected to the outflow region (19) in a flow-technical manner by a second introduction section (31.2) for the flow guidance of the second fluid flow (11.2), wherein, The first introduction section (31.1) and the second introduction section (31.2) open into a common outflow region (19), wherein, -A first introduction cross section of the first introduction section (31.1) is constricted in a constriction direction (V) along a first flow line from the first inflow region (17.1) to the outflow region (19), wherein, -A second introduction cross section of the second introduction section (31.2) is constricted in the constriction direction (V) along a second flow line from the second inflow region (17.2) to the outflow region (19), wherein, The first introduction section (31.1) and the second introduction section (31.2) are arranged adjacent to each other in the outflow region (19) along the contraction direction (V) and are separated from each other in a separation section (46) of the outflow region (19) facing the inflow region (17.1, 17.2) by a separation wall (47) oriented transversely to the contraction direction (V), wherein, -The separating wall (47) ends in the flow direction before the outflow end (51) of the outflow region (19), so that the introduction sections (31.1, 31.2) converge in a converging section (49) of the outflow region (19) facing away from the inflow region (17.1, 17.2).
  2. 2. Flow device (3) according to claim 1, wherein the flow junction section (15) is configured as a Y-tube or a pant tube.
  3. 3. The flow device (3) according to any one of the preceding claims, wherein a flange (33) is arranged at least one region selected from the first inflow region (17.1), the second inflow region (17.2) and the outflow region (19).
  4. 4. The flow device (3) according to any of the preceding claims, wherein, The first and the second introduction cross sections are flattened on one side along the respective flow paths in the constriction direction (V) at opposite sides along the constriction direction (V) and form flat sides (45.1, 45.2) respectively, -The first introduction section (31.1) and the second introduction section (31.2) converge in the outflow region (19) such that the first introduction section and the second introduction section rest with the flat sides (45.1, 45.2) against each other, wherein the flat sides (45.1, 45.2) form the separating wall (47) in the outflow region (19).
  5. 5. Flow device (3) according to claim 4, wherein, The first introduction cross section is configured circularly in the first inflow region (17.1) and semi-circularly in the outflow region (19), wherein, The second introduction cross section is configured circularly in the second inflow region (17.2) and semi-circularly in the outflow region (19), wherein, -The outflow cross section in the outflow region (19) is configured circularly, wherein the semicircular first introduction cross section and the semicircular second introduction cross section together form a circular outflow cross section.
  6. 6. The flow device (3) according to any one of the preceding claims, wherein the midpoints (X, Y, Z) of the first inflow region (17.1), of the second inflow region (17.2) and of the outflow region (19) lie in a common plane, wherein preferably the constriction direction (V) is perpendicular to the common plane, and/or wherein the first and second inflow sections (31.1, 31.2) are arranged one above the other in the outflow region (19) in a direction perpendicular to the common plane.
  7. 7. Flow device (3) according to any one of the preceding claims, wherein in the outflow region (19), in particular in the converging section (49), a flow orientation element (21), in particular a flow grid, is arranged.
  8. 8. The flow device (3) according to any one of the preceding claims, wherein the flow device (3) has a flow distribution section (23) downstream of the outflow region (19), which is designed for distributing the total fluid flow (13) into at least a first substream (5.1) and a second substream (5.2).
  9. 9. The flow device (3) according to claim 8, wherein the flow distribution section (23) has a collecting section (37) and a first outlet section (39.1) for guiding the first substream (5.1) and a second outlet section (39.2) for guiding the second substream (5.2) which are connected to the collecting section (37) in a flow-technical manner, wherein optionally the first outlet section (39.1) and the second outlet section (39.2) have equal cross-sectional areas.
  10. 10. The flow device (3) according to any one of claims 8 or 9, wherein the flow distribution section (23) is configured as a Y-tube or a pant tube.
  11. 11. Internal combustion engine (1) having a flow device (3) according to one of the preceding claims, wherein the flow device (3) is designed for bringing together two gases, in particular two fuel gases.
  12. 12. Method for converging two fluid flows (11), in particular fuel gas, in particular for the operation of an internal combustion engine (1), wherein the two fluid flows (11) are converged into a total fluid flow (13) by means of a flow device (3) according to any one of claims 1 to 10.
  13. 13. Method according to claim 12, wherein the total fluid flow (13) is divided into at least two substreams (5) by means of the flow means (3).

Description

Flow device, internal combustion engine and method for converging two fluid flows by means of such a flow device Technical Field The present invention relates to a flow device, an internal combustion engine having such a flow device and a method for converging two fluid flows by means of such a flow device. Background EP 2 924 B1 discloses a homogenizing device for at least two fluid flows, in which a vortex is generated in the fluid flows to be combined in order to support the mixing. The disadvantage is that high pressure losses are caused by the turbulence generated. This in turn has an adverse effect on the overall efficiency of the system (especially an internal combustion engine) to which the two fluid streams are applied. Even distribution of the flow after mixing is not achieved either. Furthermore, such devices typically require a large installation space. Disclosure of Invention The invention is therefore based on the task of providing a flow device, an internal combustion engine having such a flow device and a method for converging two fluid flows by means of such a flow device, wherein the disadvantages mentioned are at least reduced, preferably no longer present. This object is achieved by providing the teaching of the prior art, in particular the teaching of the independent claims and the teaching of the preferred embodiments disclosed in the dependent claims and the description. The object is achieved, inter alia, by providing a flow device having a flow junction section which is designed for converging a first fluid flow and a second fluid flow, wherein the flow junction section has a first inflow region for the first fluid flow and a second inflow region for the second fluid flow, and an outflow region for a total fluid flow which is formed by the converging of the first fluid flow and the second fluid flow. The first inflow region is connected to the outflow region in a flow-technical manner by a first introduction section for the flow guidance of the first fluid flow, wherein the second inflow region is connected to the outflow region in a flow-technical manner by a second introduction section for the flow guidance of the second fluid flow. The first and second inlet sections open into a common outlet region. The first inlet cross section of the first inlet section is constricted in a constriction direction along a first flow path from the first inlet region to the outlet region, wherein the second inlet cross section of the second inlet section is constricted in a constriction direction along a second flow path from the second inlet region to the outlet region. The first and second introduction sections are arranged adjacent to one another in the outflow region along the contraction direction and are separated from one another in a separation section of the outflow region facing the inflow region by a separation wall oriented transversely to the contraction direction, wherein the separation wall ends in the flow direction before (and in particular at a limited distance from) the outflow end of the outflow region, so that the introduction sections converge in a converging section of the outflow region facing away from the inflow region. The two fluid flows to be combined are advantageously first guided in the outflow region side by side or one above the other, but separated by a dividing wall, wherein the two fluid flows to be combined flow in the combining section (where the dividing wall ends) in the same direction and appear to flow in layers side by side or one above the other. The momentum of the flow is correspondingly oriented in the direction of departure by the dividing wall, which is advantageous in order to avoid turbulence. Advantageously, a very low pressure loss results in a compact installation space of the flow junction section and thus of the entire flow device. The low pressure loss particularly advantageously affects the efficiency of systems with flow devices, in particular internal combustion engines. Furthermore, it is possible without problems to divide the total fluid flow into equally divided sub-flows, that is to say with respect to the first fluid flow and the second fluid flow in the respective sub-flows having the same composition. The first fluid flow and the second fluid flow can be distinguished in terms of density and/or volumetric flow rate without this affecting the functionality of the flow device. The shrinkage of the two insertion sections proceeds in particular counter to the shrinkage direction. The first and second introduction sections are designed in particular such that the first and second fluid streams in each case do not undergo a swirling motion or do not significantly undergo a swirling motion, i.e. the first and second fluid streams flow in layers in the associated introduction section. This in turn means in particular that, unlike known homogenisation devices, at least reduced, preferably no, eddies are generated in the fluid flow to be c