Flow body, process for its production and use of the same
First Claim
1. Flow body with a wall and a flow channel inside the wall for a fluid, the flow channel having in the entry region of the fluid into the flow body in the direction of flow, along a central axis, a first region with a convergent cross-sectional profile and, adjoining the latter, a second region with a divergent cross-sectional profile, wherein the flow body is made up along its axis of at least a first segment and a second segment, the first segment having a convergent cross-sectional profile and the second segment having a divergent cross-sectional profile.
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Accused Products
Abstract
A flow body has a wall and a flow channel inside the wall for a fluid. The flow channel has in an entry region of the fluid into the flow body in the direction of flow, along a central axis, a first region with a convergent cross-sectional profile. Adjoining the first region is a second region with a divergent cross-sectional profile. The flow body is made up along its axis of at least a first segment and a second segment, the first segment having a convergent cross-sectional profile and the second segment having a divergent cross-sectional profile. The segments are connected together at abutting surfaces.
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Citations
21 Claims
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1. Flow body with a wall and a flow channel inside the wall for a fluid, the flow channel having in the entry region of the fluid into the flow body in the direction of flow, along a central axis, a first region with a convergent cross-sectional profile and, adjoining the latter, a second region with a divergent cross-sectional profile,
wherein the flow body is made up along its axis of at least a first segment and a second segment, the first segment having a convergent cross-sectional profile and the second segment having a divergent cross-sectional profile.
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5. Process for producing a flow body with a wall and a flow channel along a central axis inside the wall for a fluid, said flow channel having a convergent cross-sectional profile in an entry region of fluid into the flow body in the direction of flow, and a divergent cross-sectional profile adjoining the convergent cross-sectional profile, said process comprising:
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producing a first segment with a first flow channel portion with a convergent cross-sectional profile inside a wall, producing a second segment with a second flow channel portion with a divergent cross-sectional profile inside the wall, abutting the first segment with a first mating surface against a second mating surface of the second segment, and firmly connecting the segments along the mating surface so that the convergent cross-sectional profile merges in the region of the mating surfaces into the divergent cross-sectional profile. - View Dependent Claims (6, 7, 8)
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9. Metering of a process gas in a fuel cell system using a flow body with a wall and a flow channel inside the wall for a fluid, the flow channel having in the entry region of the fluid into the flow body in the direction of flow, along a central axis, a first region with a convergent cross-sectional profile and, adjoining the latter, a second region with a divergent cross-sectional profile,
wherein the flow body is made up along its axis of at least a first segment and a second segment, the first segment having a convergent cross-sectional profile and the second segment having a divergent cross-sectional profile.
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10. A method of making a flow body having a flow channel with a divergent section adjoining a convergent section, comprising:
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making a first flow body segment with a convergent flow channel section, making a second flow body segment with a divergent flow channel section, and joining said first and second flow body segments at abutting surfaces thereof disposed at a transition between the divergent and convergent sections. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A laval nozzle for metering process gas in a reaction process of a fuel cell system comprising:
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a first flow body segment with a convergent flow channel section, and a second flow body segment with a divergent flow channel section adjoining said first flow body segment at facing abutting surfaces thereof at a transition region between coaxial convergent and divergent flow channel sections, whereby said flow body segments can be formed separately from one another without requiring converging and diverging flow channel sections in a single flow body segment. - View Dependent Claims (20, 21)
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Specification