当前申请(专利权)人地址：
Bristol & Bath Science Park, Dirac Crescent, Emersons Green, Bristol, BS16 7FR, United Kingdom
摘要：
A heat exchanger (4, Fig. 2) has fluid flow channels (6, Fig. 2) with at least one heat exchanging surface 10 which has an undulating surface section extending along a length of the channel (6, Fig. 2). A surface profile of the undulating surface section varies such that at a first edge E1 the surface profile follows a first transverse wave 20 along a direction of travel z, at a second edge E2 the surface profile follows a second transverse wave 22 along the direction of travel z and at an intermediate point I between the edges E1, E2 the surface profile follows a third transverse wave 24 along the direction of travel z. The third transverse wave 24 has a different phase, frequency or amplitude to the first and second transverse waves so that chevron-shaped ridges 26 and valleys 28 are formed. Fluid flow through the heat exchanger (4, Fig. 2) may be along the direction z. The heat exchanger (4, Fig. 2) is typically produced by additive manufacturing. A system comprising a heat exchanger, method of manufacturing a heat exchanger, computer readable data structure and storage medium are also claimed.
权利要求：
CLAIMS
1. A heat exchanger comprising:
a plurality of fluid flow channels;
at least one of the fluid flow channels comprising at least one heat exchanging surface comprising at least one undulating surface section extending along at least part of a length of the channel;
wherein for each undulating surface section:
along a first edge of the undulating surface section aligned with a predetermined direction, a profile of the heat exchanging surface varies according to a first transverse wave with a direction of travel corresponding to the predetermined direction;
along a second edge of the undulating surface section aligned with the predetermined direction, a profile of the heat exchanging surface varies according to a second transverse wave with a direction of travel corresponding to the predetermined direction; and
at an intermediate portion of the undulating surface section lying between the first edge and the second edge, a profile of the heat exchanging surface varies according to a third transverse wave with a direction of travel corresponding to the predetermined direction;
wherein said third transverse wave has at least one of different phase, different amplitude and different frequency to at least one of said first transverse wave and said second transverse wave, to provide one or more chevron-shaped ridges or valleys in the undulating surface section.
2. The heat exchanger according to claim 1, wherein the first transverse wave has the same phase, amplitude and frequency as the second transverse wave.
3. The heat exchanger according to any of claims 1 and 2, wherein the third transverse wave is out of phase with at least one of the first transverse wave and the second transverse wave
4. The heat exchanger according to any of claims 1 and 2, wherein the third transverse wave has a different frequency to at least one of the first transverse wave and the second transverse wave
5. The heat exchanger according to any preceding claim, wherein the third transverse wave has a different amplitude to at least one of the first transverse wave and the second transverse wave.
6. The heat exchanger according to any preceding claim, wherein the third transverse wave has a different waveform to at least one of the first transverse wave and the second transverse wave.
7. The heat exchanger according to any preceding claim, wherein at least one of said first transverse wave, said second transverse wave and said third transverse wave comprises one of:
a sinusoidal wave: and
a triangle wave.
8. The heat exchanger according to any preceding claim, wherein an apex of the chevron-shaped ridges or valleys lies half way between the first edge and the second edge.
9. The heat exchanger according to any of claims 1 to 7, wherein at least one of the chevron-shaped ridges or valleys has an apex lying closer to one of the first edge and the second edge than the other.
10. The heat exchanger according to any preceding claim, wherein said at least one heat exchanging surface comprises a plurality of said undulating surface sections arranged side by side with the first edge of one undulating surface section adjacent to the second edge of another undulating surface section.
11. The heat exchanger according to any preceding claim, wherein said at least one heat exchanging surface has a substantially constant thickness in said at least one undulating surface section.
12. The heat exchanger according to any preceding claim, wherein said at least one heat exchanging surface comprises a wall of the at least one fluid flow channel.
13. The heat exchanger according to any preceding claim, wherein said at least one heat exchanging surface comprises an internal fin within the at least one fluid flow channel.
14. The heat exchanger according to claim 13, wherein said internal fin extends along less than a full length of the heat exchanging channel in the predetermined direction.
15. The heat exchanger according to any preceding claim, wherein the predetermined direction corresponds to a fluid flow direction of fluid through the fluid flow channels.
16. The heat exchanger according to any preceding claim, wherein the heat exchanger comprises an integrated mass of consolidated material.
17. A system comprising:
a combustor to generate heat by combusting a fuel; and
a recuperator to recover heat from the exhaust gas output by the combustor;
wherein the recuperator comprises the heat exchanger according to any preceding claim.
18. A method of manufacturing a heat exchanger comprising:
forming a plurality of fluid flow channels;
at least one of the fluid flow channels comprising at least one heat exchanging surface comprising at least one undulating surface section extending along at least part of a length of the channel;
wherein for each undulating surface section:
along a first edge of the undulating surface section aligned with a predetermined direction, a profile of the heat exchanging surface varies according to a first transverse wave with a direction of travel corresponding to the predetermined direction;
along a second edge of the undulating surface section aligned with the predetermined direction, a profile of the heat exchanging surface varies according to a second transverse wave with a direction of travel corresponding to the predetermined direction: and
at an intermediate portion of the undulating surface section lying between the first edge and the second edge, a profile of the heat exchanging surface varies according to a third transverse wave with a direction of travel corresponding to the predetermined direction;
wherein said third transverse wave has at least one of different phase, different amplitude and different frequency to at least one of said first transverse wave and said second transverse wave, to provide one or more chevron-shaped ridges or valleys in the undulating surface section.
19. The method of claim 18, wherein the heat exchanger is made by additive manufacture.
20. A computer-readable data structure representing a design of a heat exchanger according to any of claims 1 to 16.
21. A storage medium storing the data structure of claim 20.