Counterflow heat exchanger for a turbine engine, turbine engine and method for manufacturing the exchanger

Abstract

A counterflow heat exchanger (1) for a turbine engine comprising a first circuit and a second circuit, the first circuit and the second circuit being respectively configured to receive a first gas flow (10) and a second gas flow (20), each circuit having a secondary inlet manifold, an exchange member and a secondary outlet manifold (13); the exchange members of the first circuit and of the second circuit being delimited by an exchange wall configured to guide the first gas flow (10) and the second gas flow (20) in a first direction (X); and wherein the secondary inlet manifold and the secondary outlet manifold (13) of the first circuit extend in a second direction (Y) substantially perpendicular to the first direction (X) and open on one and the same face of the exchanger (1).

Description

Technical Field

[0001] The present invention relates to gas-gas heat exchangers for turbine engines, particularly countercurrent heat exchangers. Background Technology

[0002] It is known that a counter-current gas-gas heat exchanger for a turbine engine allows the gas leaving the main flow path of the high-pressure compressor to be heated by the gas leaving the main flow path of the low-pressure turbine, thereby enabling the supply of environmental control systems in the aircraft cabin, or enabling the maintenance of different systems of the aircraft within their operating temperature range, for example, ensuring compliance with mechanical tolerances.

[0003] However, there is a desire to improve efficiency and reliability and / or reduce the size of this type of switch. Summary of the Invention

[0004] The purpose of this invention is to at least partially address these shortcomings.

[0005] For this purpose, the present invention relates to a countercurrent heat exchanger for a turbine engine, comprising a first loop and a second loop, the first loop and the second loop being configured to receive a first airflow and a second airflow, respectively, each loop including a secondary inlet manifold, an exchange component and a secondary outlet manifold; the exchange component of the first loop and the second loop being defined by an exchange wall configured to guide the first airflow and the second airflow along a first direction; and the secondary inlet manifold and the secondary outlet manifold of the first loop extending along a second direction substantially perpendicular to the first direction and opening on the same surface of the exchanger.

[0006] It should be understood that the first circuit and / or the second circuit may include more than one secondary inlet manifold and / or more than one secondary outlet manifold.

[0007] Because the exchanger's structure has a first loop with secondary inlet and outlet manifolds opening on the same side of the exchanger, a more compact exchanger can be manufactured that is easier to integrate into a turbine engine. This also allows for a reduction in the exchanger's front surface area and exchange length, and thus a reduction in the exchanger's weight and volume for a given performance level.

[0008] In some embodiments, the heat exchanger has substantially equal dimensions along the three dimensions of space, which allows for limiting load losses by reducing loop length and edge effects. This also allows for improved uniformity of airflow, which can be manifested as a reduction in the number of exchange stages between two loops, thus reducing the risk of poor gas distribution. Finally, for a given performance level, a more uniform distribution of hot and cold airflows can improve the thermomechanical resistance of the exchanger.

[0009] It should be understood that the exchanger is a counter-current exchanger because the first and second airflows are guided along the first direction. It should also be understood that, because the first flow is guided along the first direction, it enters the exchange component via the first surface and exits via the second surface opposite the first surface, with the exchange component sandwiched between the first and second surfaces. Conversely, the second flow enters via the second surface of the exchange component and exits via the first surface.

[0010] Furthermore, this structure is particularly suitable for additive manufacturing, such as selective melting via a powder bed.

[0011] As a non-limiting example, the first loop may include at least two secondary inlet manifolds and at least two secondary outlet manifolds.

[0012] In some embodiments, the secondary inlet manifold and secondary outlet manifold of the first loop open into the main inlet manifold and main outlet manifold, respectively.

[0013] These main inlet and outlet manifolds allow the first airflow to be distributed toward the secondary inlet manifolds and collected from the secondary outlet manifolds.

[0014] In some embodiments, the first loop includes at least a secondary inlet manifold and / or a secondary outlet manifold, the main corresponding manifold of the main inlet manifold and the main outlet manifold includes a main pipe and at least two auxiliary pipes converging in the main pipe, and each secondary inlet manifold and / or each secondary outlet manifold is connected to an auxiliary pipe.

[0015] Multiple secondary inlet or outlet manifolds allow for better control of the first airflow in the first loop, further improving flow uniformity and thus reducing the thermomechanical resistance of the exchanger.

[0016] In some embodiments, at least one of the secondary inlet and / or outlet manifolds of the first loop may have a different cross-section than the other secondary manifolds. The secondary inlet or outlet manifolds may also be arranged such that at least two adjacent secondary collectors have a spacing different from the spacing between the other secondary manifolds.

[0017] Controlling the spacing and cross-section of the secondary manifolds allows for additional control over the flow uniformity and thermomechanical resistance of the exchanger.

[0018] In some embodiments, the second loop includes at least one secondary inlet manifold and / or one secondary outlet manifold.

[0019] Multiple secondary inlet or outlet manifolds allow for better control of the second airflow through the second loop, thereby further improving the uniformity of the flow and thus improving the thermomechanical resistance of the exchanger.

[0020] In some embodiments, the first loop includes a plurality of secondary inlet manifolds and a plurality of secondary outlet manifolds, configured such that at least one secondary inlet manifold is in communication with at least two secondary outlet manifolds.

[0021] This structure allows for optimization of the circulation of the first airflow within the first loop.

[0022] In some embodiments, the second loop includes a plurality of secondary inlet manifolds and a plurality of secondary outlet manifolds, configured such that at least one secondary inlet manifold is in communication with at least two secondary outlet manifolds.

[0023] This structure allows for optimized circulation of the second airflow within the second loop.

[0024] In some embodiments, the secondary inlet manifold and secondary outlet manifold of the second loop are configured such that the flow direction of the second airflow at the inlet and outlet of the second loop is substantially along the first direction.

[0025] Maintaining the flow direction of the second loop substantially along the first direction reduces the load loss of the second airflow passing through the exchanger.

[0026] In some embodiments, at least one of the secondary inlet and outlet manifolds of the second circuit has a V-shaped cross section in a plane orthogonal to the second direction.

[0027] The V-shaped cross-section allows for improved distribution of the second airflow within the exchange component and collection of the second airflow within the exchange component, while reducing load loss.

[0028] In some embodiments, at least one of the secondary inlet and outlet manifolds of the first loop has a V-shaped cross section in a section along a plane orthogonal to the second direction.

[0029] The V-shaped cross section allows for improved distribution of the first airflow within the exchange component and collection of the first airflow within the exchange component, while reducing load loss.

[0030] In some embodiments, the wall of the V-shaped portion has an angle of less than 45° with the first direction, preferably less than 30°.

[0031] This angle allows for limiting the deflection of the second airflow at the inlet and outlet of the exchange wall, and reduces load loss compared to known solutions with angles close to 90°.

[0032] In some embodiments, the exchange wall includes fins.

[0033] Fins increase the exchange surface area and thus improve exchanger performance. Furthermore, fins allow for better control of airflow within the exchange components, thereby further improving gas distribution. In the case of high-pressure airflow, fins also reduce the thermomechanical resistance of the exchange.

[0034] The present invention also relates to turbojet engines including the exchanger as defined above.

[0035] In some embodiments, the first circuit is connected to the compressor, and the second circuit is connected to the turbine.

[0036] Turbojet engines equipped with such exchangers have the advantage of extracting heat from the gas in the turbine (after combustion) to transfer it to the gas in the compressor (before combustion), thereby increasing the combustion temperature and thus improving the thermal efficiency of the turbojet engine.

[0037] The present invention also relates to a method for manufacturing an exchanger as defined above, the exchanger being produced by a manufacturing method including at least one powder bed additive manufacturing step.

[0038] Because gas-to-gas heat exchangers are manufactured using additive manufacturing methods (such as powder bed laser melting), the shape of the countercurrent heat exchanger can be adapted to the volume and shape of the available space in a turbine engine. In particular, the structure of such heat exchangers allows for design via additive manufacturing by limiting reliance on support components. Furthermore, this manufacturing method is easier to implement compared to conventional brazing methods.

[0039] In the context of this invention, the term "direction" is used for an unoriented straight line, and the term "orientation" is used to define orientation; the terms "inlet" and "outlet" are used in relation to the direction of gas circulation; it should be understood that when a pipe or manifold allows gas to circulate in one direction, the pipe or manifold "extends" along that direction, regardless of the shape of the cross section or dimensions in other directions. Attached Figure Description

[0040] Other features and advantages of the subject matter of this invention will become apparent from the following description of embodiments given by way of non-limiting example with reference to the accompanying drawings.

[0041] [ Figure 1 ] Figure 1 It is a cross-sectional view of a turbine engine including a counter-current heat exchanger.

[0042] [ Figure 2 ] Figure 2 This is a schematic three-dimensional diagram of a counter-current heat exchanger.

[0043] [ Figure 3 ] Figure 3This is a schematic side view of the switch.

[0044] [ Figure 4 ] Figure 4 It is along Figure 2 A schematic cross-sectional view of section IV-IV.

[0045] [ Figure 5 ] Figure 5 It is along Figure 2 The cross-sectional view of section VV.

[0046] [ Figure 6 ] Figure 6 The second embodiment of the counter-current heat exchanger is similar to Figure 5 A schematic partial cross-sectional view. Detailed Implementation

[0047] Figure 1 A half-section view of a turbine engine 101 equipped with a counter-current heat exchanger 1 (hereinafter referred to as "the exchanger") is shown along a vertical plane passing through its centerline A1-A1.

[0048] The turbine engine 101 includes, from upstream to downstream, a fan 102, a low-pressure compressor 103 (also referred to as a "supercharger"), a high-pressure compressor 104, a combustion chamber 105, a high-pressure turbine 106, and a low-pressure turbine 107 along the circulation of airflow. These different components are mounted within a pod 120 to obtain a propulsion assembly that includes the pod 120 and the turbine engine 101.

[0049] Downstream of fan 102, the airflow is divided into a first airflow portion (also called the main airflow) F1 that passes through low-pressure compressor 103 and a second airflow portion (also called the secondary airflow) F2 that bypasses low-pressure compressor 103.

[0050] Fan 102 and low-pressure compressor 103 are driven by low-pressure turbine 107 via main low-pressure shaft SL, while high-pressure compressor 104 is driven by high-pressure turbine 106 via main high-pressure shaft SH. Main low-pressure shaft SL typically extends inside main high-pressure shaft SH.

[0051] As mentioned above, turbine engine 101 is a turbine engine equipped with exchanger 1. Figure 1As schematically illustrated, this exchanger 1 supplies compressed air exiting the high-pressure compressor 104 via an intake duct (not shown), forming a first airflow 10. This compressed air is heated inside the exchanger 1 by hot gas exiting the low-pressure turbine 107, forming a second airflow 20, which is then sent towards the combustion chamber 105 via a return duct (not shown). The presence of the exchanger 1 has the advantage of reducing fuel consumption of the turbine engine 101 (and thus improving thermal efficiency) because the air entering the combustion chamber 105 has been preheated by the hot gas exiting the low-pressure turbine 107.

[0052] In one embodiment, the exchanger 1 may have, for example, a substantially cubic or cuboid shape, such as Figure 2 As shown. In Figures 2 to 6 In one embodiment, the exchange 1 is shown in an orthogonal reference frame XYZ formed by a first direction X, a second direction Y, and a third direction Z.

[0053] exist Figures 2 to 6 In the diagram, arrows without filler indicate the local circulation direction of the first airflow 10 through the exchanger 1, while arrows with solid filler indicate the local circulation direction of the second airflow 20 through the exchanger 1.

[0054] For ease of reading, the reference numerals for a large number of existing components (such as auxiliary pipes 16, 19) are not shown for each component.

[0055] Generally, the exchanger 1 includes a first gas circuit that receives a first gas flow 10 and a second gas circuit that receives a second gas flow 20.

[0056] Figure 3 and Figure 4 The diagram schematically illustrates two views of the switch 1 along two perpendicular directions. Figure 4 Having along Figure 2 The cross-sectional view of section IV-IV.

[0057] exist Figures 2 to 4 In one embodiment, the first gas circuit has a main inlet manifold 14, a plurality of secondary inlet manifolds 11, an exchange component 12, a plurality of secondary outlet manifolds 13, and a main outlet manifold 17. In the first circuit, a first flow 10 enters the exchanger 1 via the main inlet manifold 14 and then passes through the secondary inlet manifolds 11, wherein the first flow 10 is distributed in the exchange component 12 of the first circuit. The first flow 10 is then collected in the secondary outlet manifolds 13 and exits the exchanger 1 via the main outlet manifold 17.

[0058] The main inlet manifold 14 and the main outlet manifold 17 enable the limitation of load loss at the inlet and outlet of the switch 1.

[0059] exist Figures 2 to 6 In the embodiments and as shown Figures 2 to 4 As shown, the second gas loop includes several secondary inlet manifolds 21, an exchange component 22, and several secondary outlet manifolds 23. A second stream 20 enters the exchanger 1 via the secondary inlet manifolds 21, where it is distributed within the exchange component 22 of the second loop. The second stream 20 is then collected in the secondary outlet manifolds 23 and exits the exchanger 1.

[0060] The first gas circuit and the second gas circuit are not interconnected, so that the gas flows 10 and 20 do not mix. However, the exchange wall 30 placed between the exchange components 12 and 22 of the first circuit and the second circuit promotes heat exchange between the first gas flow 10 and the second gas flow 20, and allows the first gas flow 10 and the second gas flow 20 to be guided along the first direction X.

[0061] Specifically, the exchanger 1 is a countercurrent heat exchanger 1, that is, in the exchange components 12 and 22 of the first and second loops, the two airflows 10 and 20 circulate in essentially the same direction but in opposite orientations.

[0062] The second loop extends substantially along the first direction X, such that the flow direction of the second airflow 20 at the inlet and outlet of the second loop is along the first direction X.

[0063] The secondary inlet manifold 11 and the secondary outlet manifold 13 of the first loop extend along a second direction Y that is substantially perpendicular to the first direction X and open onto the same surface of the exchanger 1. The secondary inlet manifold 11 and the secondary outlet manifold 13 of the first loop extending along the second direction Y are also connected to the exchange component 12 of the first loop extending along the first direction X, and thus each has an elbow.

[0064] The elbow of the secondary inlet manifold 11 is located at the connection between the inlet pipe 11 and the exchange component 12. The elbow of the secondary inlet manifold 11 is used to redirect the flow entering the first circuit along the second direction Y towards the exchange component 12 of the first circuit in the first direction X.

[0065] The elbow of the secondary outlet manifold 13 is located at the connection between the secondary outlet manifold 13 and the switching component 12. The elbow of the secondary outlet manifold 13 is used to redirect the flow from the switching component 12 of the first circuit toward the outlet of the first circuit via the secondary outlet manifold 13, which extends substantially along the second direction Y.

[0066] In particular, Figures 2 to 5In this embodiment, the number of secondary inlet manifolds 11 and secondary outlet manifolds 13 in the first loop is seven. However, this number is given by way of non-limiting example. The exchanger 1 may have at least one secondary inlet manifold 11, preferably at least two secondary inlet manifolds 11. The exchanger may have at least one secondary outlet manifold 13, preferably at least two secondary outlet manifolds 13. It should be understood that the first loop may include different numbers of secondary inlet manifolds 11 and secondary outlet manifolds 13. It should also be noted, but not limited to, that the secondary inlet manifolds 11 and secondary outlet manifolds 13 of the first loop have a cross-section that is substantially constant along the second direction Y in the cross-section XZ perpendicular to the second direction Y—except for elbows.

[0067] Note that the secondary inlet manifold 11 and the secondary outlet manifold 13 have the same cross-section in a section XZ perpendicular to the second direction Y, and the secondary inlet manifold 11 and the secondary outlet manifold 13 are spaced apart from each other by the same distance along a third direction Z perpendicular to the first direction X and the second direction Y. It will be understood that at least one of the secondary inlet manifold 11 and / or the secondary outlet manifold 13 may have different cross-sections. It should be understood that at least one of the secondary inlet manifold 11 and / or the secondary outlet manifold 13 may be spaced apart from adjacent pipes by a distance different from the distance between adjacent pipes and other pipes.

[0068] exist Figures 2 to 5 In this embodiment, the number of secondary inlet manifolds 21 and secondary outlet manifolds 23 in the second loop is eight. However, this number is given by way of non-limiting example. Switch 1 may have at least one secondary inlet manifold 21, preferably at least two. Switch 1 may have at least one secondary outlet manifold 23, preferably at least two. It should be understood that the second loop may include different numbers of secondary inlet manifolds 21 and secondary outlet manifolds 23.

[0069] Note that the secondary inlet manifold 21 and secondary outlet manifold 23 of the second loop at the end of the switch 1 have different widths along the third direction Z compared to the intermediate secondary inlet manifold 21 and secondary outlet manifold 23, and the secondary inlet manifold 21 and secondary outlet manifold 23 of the second loop are spaced apart from each other by the same distance along the third direction Z.

[0070] exist Figures 2 to 5 In the embodiments, the secondary inlet manifold 21 and secondary outlet manifold 23 of the second loop correspond to openings formed between the secondary outlet manifold 13 and the secondary inlet manifold 11, respectively. It should be understood, however, that the second loop may include a secondary inlet manifold 21 and a secondary outlet manifold 23 projecting outwards from the exchanger.

[0071] exist Figures 2 to 6 In the embodiments and as shown Figures 2 to 4As shown, the main inlet manifold 14 includes a main inlet pipe 15 and seven auxiliary inlet pipes 16, which converge in the main inlet pipe 15. The number of auxiliary inlet pipes 16 then corresponds to the number of secondary inlet manifolds 11, such that each inlet pipe connects to an auxiliary inlet pipe 16. The number of auxiliary inlet pipes 16 is given by way of non-limiting example.

[0072] exist Figures 2 to 6 In the embodiments and as shown Figures 2 to 4 As shown, the main outlet manifold 17 includes a main outlet pipe 18 and seven auxiliary outlet pipes 19, which converge in the main outlet pipe 18. The number of auxiliary outlet pipes 19 then corresponds to the number of secondary outlet manifolds 13, such that each secondary outlet manifold 13 connects to an auxiliary outlet pipe 19. The number of auxiliary outlet pipes 19 is given by way of non-limiting example.

[0073] It should be understood that auxiliary pipes 16 and 19 can be implemented independently on the main inlet manifold 14 and / or the main outlet manifold 17.

[0074] It should also be understood that although the second circuit is not shown to have a main manifold, this does not preclude an embodiment in which any pipe connected to the second circuit functions as a main manifold.

[0075] Figure 5 It is along Figure 2 The cross-sectional view of section VV.

[0076] The dashed lines schematically represent the extension of the exchange components 12, 22 substantially along the first direction X seen in section VV, and examples of the corresponding trajectories of the airflows 10, 20 have been shown.

[0077] In particular, it should be understood that the exchange walls 30 defining the exchange components 12, 22 may be formed into a dense mesh and / or have fins or any structure known to those skilled in the art, so as to increase the exchange surface and provide control over the airflow in the exchange components 12, 22.

[0078] It should be noted that, for the purposes of explanation, the representation of flow is Figure 5 The projection in the plane. In particular, the first airflow 10 is shown entering and exiting in the first direction X, but in Figure 5 In the embodiment described herein, the first airflow 10 enters and exits the first loop along a second direction Y perpendicular to the direction of the plane XZ.

[0079] exist Figure 5 The cross section (i.e., perpendicular to the second direction Y and passing through exchanger 1 and therefore with) Figure 5In a plane parallel to the plane of the first loop, the secondary inlet manifold 11 and the secondary outlet manifold 13 have V-shaped cross sections, and the secondary inlet manifold 21 and the secondary outlet manifold 23 of the second loop also have V-shaped cross sections. The secondary inlet manifold 11 of the first loop and the outlet manifold 23 of the second loop form a W-shaped structure. Similarly, the secondary inlet manifold 21 of the second loop and the secondary outlet manifold 13 of the first loop form a W-shaped structure.

[0080] Specifically, the wall of the V-shaped section has an angle of less than 45° with the first direction X, preferably less than 30°.

[0081] Figure 6 A second embodiment is shown, which is Figure 5 A variant of the first embodiment shown. Figure 6 Is with Figure 5 A cross-sectional view similar to the cross-sectional view. Therefore, Figure 6 It shows Figure 5 A schematic diagram of a modified embodiment is shown, wherein dashed lines schematically illustrate the extension of the exchange components 12, 22 substantially along the direction X seen in the cross-sectional view VV. This second embodiment is similar to the first embodiment.

[0082] exist Figure 6 In this embodiment, the secondary inlet manifold 11 and secondary outlet manifold 13 of the first loop are positioned in a staggered arrangement, meaning that the secondary inlet manifold 11 and secondary outlet manifold 13 of the first loop are no longer substantially aligned along the first direction X. However, the first flow 10 is guided along the first direction X.

[0083] Furthermore, the secondary inlet manifold 21 and secondary outlet manifold 23 of the second loop are positioned in a staggered arrangement, meaning that the secondary inlet manifold 21 and secondary outlet manifold 23 of the second loop are no longer substantially aligned along the first direction X. However, the second flow 20 is guided along the first direction X.

[0084] Therefore, along Figure 6 In a view perpendicular to the plane of the second direction Y, the secondary inlet manifold 11 of the first circuit is aligned with the secondary inlet manifold 21 of the second circuit along the first direction X, and reciprocally, the secondary outlet manifold 23 of the second circuit is aligned with the secondary outlet manifold 13 of the first circuit along the first direction X.

[0085] like Figure 6 As illustrated in the airflow circulation example, this staggered structure allows the secondary inlet manifold 11 of the first loop to be connected to at least two secondary outlet manifolds 13 of the first loop, splitting the flow into two parts while limiting load loss. Similarly, the staggered structure allows the secondary inlet manifold 21 of the second loop to be connected to at least two secondary outlet manifolds 23 of the second loop, splitting the flow into two parts while limiting load loss.

[0086] The staggered structure also allows the secondary outlet manifold 13 of the first loop to be connected to at least two secondary inlet manifolds 11 of the first loop, and to collect flow from the two secondary inlet manifolds 11 while limiting load loss. Similarly, the staggered structure also allows the outlet pipe 23 of the second loop to be connected to at least two inlet pipes of the second loop, and to collect flow from the two secondary inlet manifolds 21 while limiting load loss.

[0087] The exchanger 1 has a structure particularly suitable for embodiments of additive manufacturing methods. The method for manufacturing the exchanger 1 can then be wholly or partially realized by additive manufacturing (e.g., by powder bed laser melting technology).

[0088] Although the invention has been described with reference to specific exemplary embodiments, it will be apparent that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. In particular, features of the different embodiments shown / mentioned may be combined in additional embodiments. Therefore, the description and drawings should be considered illustrative rather than restrictive.

Claims

1. A counter-current heat exchanger (1) for a turbine engine, comprising: A first loop and a second loop, the first loop and the second loop being configured to receive a first airflow (10) and a second airflow (20), respectively, each loop including a secondary inlet manifold (11, 21), an exchange component (12, 22) and a secondary outlet manifold (13, 23), characterized in that: The exchange components (12, 22) of the first and second loops are defined by an exchange wall (30), which is configured to guide the first airflow (10) and the second airflow (20) along a first direction (X); and The secondary inlet manifold (11) and secondary outlet manifold (13) of the first loop extend along a second direction (Y) substantially perpendicular to the first direction (X) and open onto the same surface of the heat exchanger (1). The secondary inlet manifold (11) and secondary outlet manifold (13) of the first loop open into the main inlet manifold (14) and the main outlet manifold (17), respectively. The heat exchanger (1) includes at least a secondary inlet manifold (11) and / or a secondary outlet manifold (13), and the main corresponding manifold among the main inlet manifold (14) and the main outlet manifold (17) includes a main pipe (15, 18) and at least two auxiliary pipes (16, 19) that converge in the main pipe (15, 18). Each secondary inlet manifold (11) and / or each secondary outlet manifold (13) is connected to an auxiliary pipe (16, 19).

2. The heat exchanger (1) according to claim 1, wherein the first loop includes a plurality of secondary inlet manifolds (11) and a plurality of secondary outlet manifolds (13), which are configured such that at least one secondary inlet manifold (11) is in communication with at least two secondary outlet manifolds (13).

3. The heat exchanger (1) according to claim 1, wherein the secondary inlet manifold (21) and the secondary outlet manifold (23) of the second loop are respectively configured such that the flow direction of the second gas flow at the inlet and outlet of the second loop is substantially along the first direction (X).

4. The heat exchanger (1) according to claim 3, wherein at least one secondary inlet manifold (21) and secondary outlet manifold (23) of the second loop have a V-shaped cross section in a plane (XZ) orthogonal to the second direction (Y).

5. The heat exchanger (1) according to claim 4, wherein the wall of the V-shaped cross section has an angle of less than 45° with the first direction.

6. A turbine engine (101) comprising a heat exchanger (1) according to claim 1.

7. The turbine engine (101) according to claim 6, wherein the first circuit is connected to the compressor (104) and the second circuit is connected to the turbine (107).

8. A method for manufacturing a heat exchanger (1) according to claim 1, comprising at least one powder bed additive manufacturing step.

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