Conformal heat exchanger

Patent metadata

Field	Value
Publication number	US-12298080-B2
Application number	US-202318165256-A
Country	US
Kind code	B2
Filing date	Feb 6, 2023
Priority date	Feb 10, 2022
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

A heat exchanger is provided and includes parting sheets flat along a first axis and curved along a second axis perpendicular to the first axis, a fin sheet interposed between the parting sheets and corrugated along the first axis to form fins that are curved along the second axis and diffusion bonds formed along an entire length of a fin to diffusion bond the entire length of the fin to the parting sheets.

First claim

What is claimed is:

1. A heat exchanger, comprising:
parting sheets flat along a first axis and curved along a second axis perpendicular to the first axis;
a fin sheet interposed between the parting sheets and corrugated along the first axis to form fins that are curved along the second axis; and
diffusion bonds formed along an entire length of a fin to diffusion bond the entire length of the fin to the parting sheets.

2. The heat exchanger according to claim 1 , wherein the diffusion bonds are formed by field assisted sintering technology/spark plasma sintering (FAST/SPS) processing.

3. The heat exchanger according to claim 1 , wherein the diffusion bonds are formed along respective entire lengths of a substantial number of the fins to diffusion bond the respective entire lengths of the substantial number of the fins to the parting sheets.

4. The heat exchanger according to claim 1 , wherein the diffusion bonds are formed along respective entire lengths of each fin to diffusion bond the respective entire lengths of each fins to the parting sheets.

5. The heat exchanger according to claim 1 , further comprising side bars on opposite sides of the fin sheet.

6. The heat exchanger according to claim 1 , further comprising an additional fin sheet abutting one of the parting sheets and being corrugated along the second axis to form fins that are curved along the first axis.

7. The heat exchanger according to claim 6 , wherein the fin sheet and the additional fin sheet have different thicknesses.

8. The heat exchanger according to claim 6 , wherein:
the parting sheets and the fin sheet form a layer, and
the heat exchanger comprises multiple layers with neighboring layers being separated by an additional fin sheet.

9. The heat exchanger according to claim 8 , wherein curvatures along the second axis of the multiple layers differ.

10. A conformal heat exchanger for disposition within a curved passage and comprising multiple layers each comprising:
first and second parting sheets, each flat along a first axis and curved along a second axis perpendicular to the first axis to conform to the curved passage;
a fin sheet interposed between the first and second parting sheets and corrugated along the first axis to form fins that are curved along the second axis to conform to the curved passage, each fin comprising first and second sections for contacting the first and second parting sheets, respectively; and
first and second diffusion bonds formed along respective entire lengths of the first and second sections, respectively, of a fin to diffusion bond the respective entire lengths of the first and second sections of the fin to the first and second parting sheets, respectively.

11. The conformal heat exchanger according to claim 10 , wherein the first and second diffusion bonds are formed by field assisted sintering technology/spark plasma sintering (FAST/SPS) processing.

12. The conformal heat exchanger according to claim 10 , wherein the first and second diffusion bonds are formed along respective entire lengths of the first and second sections, respectively, of a substantial number of the fins to diffusion bond the respective entire lengths of the first and second sections of the substantial number of the fins to the first and second parting sheets, respectively.

13. The conformal heat exchanger according to claim 10 , wherein the first and second diffusion bonds are formed along respective entire lengths of the first and second sections, respectively, of each of the fins to diffusion bond the respective entire lengths of the first and second sections of each of the fins to the first and second parting sheets, respectively.

14. The conformal heat exchanger according to claim 10 , further comprising side bars on opposite sides of the fin sheet in each of the multiple layers.

15. The conformal heat exchanger according to claim 10 , further comprising an additional fin sheet interleaved between neighboring ones of the multiple layers and being corrugated along the second axis to form fins that are curved along the first axis.

16. The conformal heat exchanger according to claim 15 , wherein the fin sheets and the additional fin sheets each have different thicknesses.

17. The conformal heat exchanger according to claim 10 , wherein curvatures along the second axis of the multiple layers differ.

18. A method of assembling a conformal heat exchanger, the method comprising:
forming a fin sheet flat and corrugated along a first axis to form fins extending along a second axis perpendicular to the first axis;
interposing the fin sheet between parting sheets;
executing field assisted sintering technology/spark plasma sintering (FAST/SPS) processing to form diffusion bonds along respective entire lengths of each fin to diffusion bond the respective entire lengths of each fin to the parting sheets; and
imparting a curvature to the parting sheets and the fin sheet along the second axis with the diffusion bonds surviving the imparting.

19. The method according to claim 18 , wherein:
the fin sheet and the parting sheets form a layer of the conformal heat exchanger; and
the method further comprises interleaving additional fin sheets between multiple layers to form an assembly and installing the assembly into a curved passage.

20. The method according to claim 19 , wherein the imparting of the curvature for each of the multiple layers comprises varying the curvature for each of the multiple layers.

Assignees

• Rtx Corp

Inventors

• Wiedenhoefer James Fredric

Classifications

• F28F2275/061

  by diffusion bonding · CPC title

• F28F2215/04

  Assemblies of fins having different features, e.g. with different fin densities · CPC title

• F28F3/027

  with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips · CPC title

• F28D2021/0026

  for combustion engines, e.g. for gas turbines or for Stirling engines · CPC title

• F05D2260/213

  by the provision of a heat exchanger within the cooling circuit · CPC title