# US 2023/0407791 A1 · Countercurrent heat exchanger for a turbomachine, turbomachine, and method for manufacturing the exchanger

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- Number: US 2023/0407791 A1
- Document ID: US20230407791A1
- Status: Published application
- Kind: A1
- Application number: 18/248,290
- Filed: 2021-10-07
- Published: 2023-12-21
- Earliest claimed: 2020-10-08
- Assignees: Safran
- Applicants: Safran
- Inventors: Ephraïm TOUBIANA; Fabien DESARNAUD; Frédéric LAURENSAN
- Web page: https://patentgrep.com/patent/US20230407791A1

## CPC

- F02C 7/141: of working fluid
- F28D 1/0476: {the conduits having a non-circular cross-section}
- F28D 9/0006: {the plate-like or laminated conduits being enclosed within a pressure vessel}
- F28F 1/022: {with multiple channels}
- F28F 9/0275: {with multiple branch pipes}
- B33Y 10/00: Processes of additive manufacturing
- B33Y 80/00: Products made by additive manufacturing
- F05D 2260/213: by the provision of a heat exchanger within the cooling circuit
- F28D 2021/0026: {for combustion engines, e.g. for gas turbines or for Stirling engines}
- F28F 2009/029: {with increasing or decreasing cross-section, e.g. having conical shape}
- F28F 2210/02: with particular branching, e.g. fractal conduit arrangements
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A counter-current heat exchanger for a turbomachine comprising a first and a second circuit, the first and the second circuit being respectively configured to receive a first gas flow and a second gas flow, each circuit including a secondary inlet manifold, an exchanging part and a secondary outlet manifold; the exchanging parts of the first circuit and of the second circuit being delimited by exchange walls configured to direct the first and the second gas flow along a first direction; and wherein the secondary inlet manifold and the secondary outlet manifold of the first circuit extend along a second direction substantially perpendicular to the first direction, and open onto a same face of the exchanger.

## Claims

### Claim 3 (depends on 2)

The heat exchanger as claimed in claim 2,
comprising at least a second secondary inlet manifold and/or a second secondary outlet manifold, the main corresponding manifold among the main inlet manifold and the main outlet manifold comprises a primary duct and at least two auxiliary ducts meeting in the primary duct,
each secondary inlet manifold and/or each secondary outlet manifold being connected to an auxiliary duct.

### Claim 4 (depends on 1)

The heat exchanger as claimed in claim 1, wherein the first circuit comprises a plurality of secondary inlet manifolds and a plurality of secondary outlet manifolds configured such that at least one secondary inlet manifold communicates with at least two secondary outlet manifolds.

### Claim 5 (depends on 1)

The heat exchanger as claimed in claim 1, wherein the secondary inlet manifold and the secondary outlet manifold of the second circuit are respectively configured so that the directions of flow of the second gas flow at the inlet and the outlet of the second circuit are substantially along the first direction.

### Claim 6 (depends on 5)

The heat exchanger as claimed in claim 5,
wherein the at least one secondary inlet and outlet manifolds of the second circuit has a V-shaped section in a section along a plane orthogonal to the second direction.

### Claim 7 (depends on 6)

The heat exchanger as claimed in claim 6, wherein walls of the V-shaped section have an angle with the first direction less than preferably less than 30°.

### Claim 8 (depends on 1)

A turbomachine comprising a heat exchanger as claimed in claim 1.

### Claim 9 (depends on 8)

The turbomachine as claimed in claim 8, wherein the first circuit is connected to a compressor and the second circuit is connected to a turbine.

### Claim 10 (depends on 1)

A method for manufacturing a heat exchanger as claimed in claim 1, comprising at least one powder bed additive manufacturing step.