A tuna gill filament biomimetic structure micro-channel heat exchange test device and method

Abstract

The application belongs to the technical field of hypersonic vehicle engine, and particularly relates to a tuna gill filament bionic structure micro-channel heat exchange test device and method, which comprises, in sequence, a coming air heating section, a test section and a measuring section; the test section comprises a heat exchange piece, a side wall piece and a vortex generating structure; two heat exchange pieces are oppositely arranged in a detachable manner; two side wall pieces are oppositely arranged between the two heat exchange pieces; two heat exchange surfaces and two flow channel side walls form a rectangular flow channel; the vortex generating structure is arranged in the rectangular flow channel; when the two heat exchange pieces are matched, the two heat exchange surfaces abut against the two ends of the side wall piece and the first end surface and the second end surface of the vortex generating structure, and the side wall piece and the vortex generating structure are fixed, so that the test device is convenient for replacing different vortex generating structures to obtain a more optimal configuration of the vortex generating structure during testing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hypersonic vehicle engine, and particularly relates to a tuna gill filament bionic structure micro-channel heat exchange test device and method. BACKGROUND

[0002] With the development of aerospace technology, the application of pre-cooling type combined cycle engine in hypersonic vehicles is more and more extensive. When the vehicle flies at hypersonic speed, the high-temperature incoming air needs to pass through a pre-cooler to reduce the temperature before entering the compressor to ensure the working efficiency of the compressor, so as to realize the purpose of large thrust and high specific impulse of the engine. However, due to the complex working environment and extremely high heat dissipation demand in the combined cycle engine, the air pre-cooling technology faces great challenges.

[0003] At present, when a certain air pre-cooler is tested, a special experimental device matched with the air pre-cooler needs to be specially designed. When different sizes and different structures of parts are replaced, the device needs to be redesigned, and the cost of equipment and design is extremely high, so that the mechanism research on the convective heat transfer of the structure in the flow channel cannot be realized at low cost and high efficiency. SUMMARY

[0004] The technical problem to be solved by the application is to provide a tuna gill filament bionic structure micro-channel heat exchange test device and method which is low in cost, fast in response, easy to use, and can save development cost and improve research efficiency.

[0005] The application provides a tuna gill filament bionic structure micro-channel heat exchange test device, which comprises, in sequence, an incoming air heating section, a test section and a measurement section.

[0006] The test section comprises two heat exchange pieces, two side wall pieces and at least one vortex generating structure to be measured.

[0007] The two heat exchange pieces are detachably arranged opposite to each other, and the opposite sides are heat exchange surfaces parallel to each other.

[0008] The two side wall pieces are arranged opposite to each other between the two heat exchange pieces, and the opposite sides are flow channel side walls parallel to each other.

[0009] The two heat exchange surfaces and the two flow channel side walls form a rectangular flow channel, and the vortex generating structure is arranged in the rectangular flow channel.

[0010] The vortex generating structure comprises a first end surface and a second end surface arranged opposite to each other.

[0011] When the two heat exchange pieces are matched, the two heat exchange surfaces abut against the two ends of the side wall piece and the first end surface and the second end surface of the vortex generating structure, and the side wall piece and the vortex generating structure are fixed.

[0012] Further, the side wall member and / or the vortex generating structure is made of elastic material.

[0013] Further, the two heat exchange members are detachably connected by bolts.

[0014] Further, the side wall member is provided with a through hole, and the bolts connecting the two heat exchange members pass through the through hole.

[0015] Further, the heat exchange member and the side wall member are provided with an ear plate on the outside, and the bolts are arranged on the ear plate.

[0016] Further, the heat exchange member is provided with a cooling channel for circulating coolant.

[0017] Further, the vortex generating structure is a triangular column, including oppositely arranged first and second end faces, and first, second and third side edges of a rectangular face.

[0018] The first side edge is arranged in abutment with one of the flow channel side walls, the second side edge is close to one side of the incoming air heating section, and the included angle between the second side edge and the flow channel side wall is greater than or equal to 90°; and the third side edge is close to one side of the measuring section, and the included angle between the third side edge and the flow channel side wall is greater than 90°.

[0019] Further, the incoming air heating section includes an air heating section, a front end measuring section, a straightening section, a damping net section and a contraction section arranged in sequence, and the outlet of the contraction section is connected with the inlet of the rectangular flow channel.

[0020] Further, the measuring section includes a rear end measuring section and a negative pressure section arranged in sequence, and the inlet of the rear end measuring section is connected with the outlet of the rectangular flow channel.

[0021] The application also provides a tuna gill filament biomimetic structure micro-channel heat exchange test method, which uses the experimental device of the tuna gill filament biomimetic structure micro-channel heat exchange test.

[0022] S1, placing the vortex generating structure to be measured in the rectangular flow channel, assembling the test section, and connecting the incoming air heating section, the test section and the measuring section;

[0023] S2, conveying heated air to the incoming air heating section, and the heated air passes through the test section and the measuring section in sequence and flows out from the measuring section;

[0024] S3, obtaining the air temperature of the incoming air heating section and the measuring section, and completing the performance test of the vortex generating structure to be measured.

[0025] S4, dismounting two heat exchange members, replacing the measured vortex generating structure of different sizes and configurations, or replacing the same measured vortex generating structure in different installation positions and / or different numbers, and repeating steps S1-S4.

[0026] The present application has the beneficial effect that the present application completes the dismounting of the side wall member and the replacement of the vortex generating structure through the detachable connection of two heat exchange members, so that the test device only needs to replace the vortex generating structure during testing, and can test the heat exchange performance of different sizes of rectangular flow channels, different sizes of vortex generating structures, different shapes of vortex generating structures, different installation positions of vortex generating structures, and different numbers of vortex generating structures, greatly reducing the equipment cost of the test, and the replacement and dismounting of the vortex generating structure are extremely convenient and fast, greatly improving the test efficiency, and the vortex generating structure is stable and reliable after installation, which can ensure the stability and accuracy of the test.

[0027] In addition, the present application is particularly suitable for performance testing of triangular column vortex generating structures, the first end face and the second end face of the triangular column vortex generating structure can directly determine the thickness of the rectangular flow channel, and the first side edge is arranged in close contact with one of the flow channel side walls of the side wall member, which is also convenient to arrange. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the present application; Figure 1 Figure 1 is a structural schematic diagram of the present application;

[0029] Figure 1 is a structural schematic diagram of the present application; Figure 2 Figure 1 is a structural schematic diagram of the present application;

[0030] Figure 1 is a structural schematic diagram of the present application; Figure 3 Figure 1 is a structural schematic diagram of the present application;

[0031] Figure 1 is a structural schematic diagram of the present application; Figure 4 Figure 1 is a structural schematic diagram of the present application;

[0032] Figure 1 is a structural schematic diagram of the present application; Figure 5 Figure 1 is a structural schematic diagram of the present application;

[0033] Figure 1 is a structural schematic diagram of the present application; Figure 6 Figure 1 is a structural schematic diagram of the present application;

[0034] Figure 1 is a structural schematic diagram of the present application; Figure 7 Figure 1 is a structural schematic diagram of the present application;

[0035] Figure 1 is a structural schematic diagram of the present application; Figure 8 Figure 1 is a structural schematic diagram of the present application;

[0036] In the figure, 1-air heating section; 11-electric heating device; 2-round-to-square transition section; 3-front end measuring section; 31-flow rate sensor; 4-straightening section; 41-rectangular small flow channel; 42-hexagonal small flow channel; 5-damping mesh section; 51-metal mesh; 6-contracting section; 7-test section; 71-heat exchange piece; 711-heat exchange surface; 712-cooling channel; 7121-cooling agent inlet; 7122-cooling agent outlet; 72-side wall piece; 721-flow channel side wall; 73-vortex generating structure; 731-first side edge; 732-second side edge; 733-third side edge; 734-first end surface; 735-second end surface; 736-circular arc; 74-rectangular flow channel; 75-bolt; 8-rear end measuring section; 9-negative pressure section; 91-turbine fan. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0039] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0040] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection, or physical connection or wireless communication connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0042] As shown in the accompanying drawings Figures 1-8 The present application provides a tuna gill filament biomimetic structure micro-channel heat exchange test device for testing the heat exchange performance of a micro-channel provided with a tuna gill filament biomimetic structure, so as to find a more optimal structure and a more optimal installation position of the vortex generating structure 73 to be tested, so as to realize a better combination of air resistance coefficient and heat exchange effect, comprising a flow air heating section, a test section 7 and a measurement section arranged in sequence, wherein the flow air heating section is used for heating the air entering the test section 7, the measurement section is used for obtaining the temperature of the heated air after passing through the test section 7, obtaining the cooling performance of the test section 7, and obtaining the air flow rate of each part, providing data support for the resistance coefficient of the test section 7;

[0043] The test section 7 comprises two heat exchange pieces 71, two side wall pieces 72 and at least one vortex generating structure 73 to be tested;

[0044] The two heat exchange pieces 71 are detachably arranged opposite to each other, and the opposite side is a heat exchange surface 711 parallel to each other;

[0045] The two side wall pieces 72 are arranged opposite to each other between the two heat exchange pieces 71, and the opposite side is a flow channel side wall 721 parallel to each other;

[0046] The two heat exchange surfaces 711 and the two flow channel side walls 721 form a rectangular flow channel 74, and the vortex generating structure 73 is arranged in the rectangular flow channel 74;

[0047] The vortex generating structure 73 comprises a first end surface 734 and a second end surface 735 arranged opposite to each other;

[0048] In one specific application scenario, referring to Figure 5 and Figure 8 The vortex generating structure 73 is a triangular column, that is, a tuna gill filament biomimetic structure, which is combined with the rectangular flow channel 74 to form a tuna gill filament biomimetic structure micro-channel. The vortex generating structure 73 comprises a first end surface 734 and a second end surface 735 arranged opposite to each other, and a first side edge 731, a second side edge 732 and a third side edge 733 in the form of a rectangular surface;

[0049] The first side edge 731 is arranged in abutment with one of the flow channel side walls 721, the second side edge 732 is close to one side of the incoming flow air heating section, and the included angle between the second side edge 732 and the flow channel side wall 721 is greater than or equal to 90°; the third side edge 733 is close to one side of the measurement section, and the included angle between the third side edge 733 and the flow channel side wall 721 is greater than 90°, in addition, the second side edge 732 and the third side edge 733 can also be transitioned through a circular arc 736, one of the purposes of the test device is to find the optimal distance of the first end face 734 and the second end face 735 of the vortex generating structure 73, that is, the optimal thickness of the triangular column; find the optimal included angle of the first side edge 731 and the second side edge 732, that is, the optimal included angle of the second side edge 732 and the flow channel side wall 721; find the optimal included angle of the first side edge 731 and the third side edge 733, that is, the optimal included angle of the third side edge 733 and the flow channel side wall 721, find the optimal diameter of the circular arc 736, in order to find a better structure of the measured vortex generating structure 73, and achieve better air resistance coefficient and heat exchange effect.

[0050] When the two heat exchange pieces 71 are matched, the two heat exchange surfaces 711 abut the two ends of the side wall piece 72 and the first end face 734 and the second end face 735 of the vortex generating structure 73, and fix the side wall piece 72 and the vortex generating structure 73.

[0051] The present application can complete the disassembly and assembly of the side wall piece 72 and the replacement of the vortex generating structure 73 through the detachable connection of the two heat exchange pieces 71, so that the test device only needs to replace the vortex generating structure 73 during testing, that is, the heat exchange performance test of different size rectangular flow channels, different size vortex generating structures 73, different shape vortex generating structures 73, different installation position vortex generating structures 73, and different number of vortex generating structures 73 can be carried out, which greatly reduces the equipment cost of the test, and the replacement and disassembly of the vortex generating structure 73 are extremely convenient and fast, which greatly improves the test efficiency. The vortex generating structure 73 is stable and reliable after installation, which can ensure the stability and accuracy of the test.

[0052] In addition, the present application is particularly suitable for performance testing of the triangular column vortex generating structure 73, the first end face 734 and the second end face 735 of the triangular column vortex generating structure 73 can directly determine the thickness of the rectangular flow channel 74, and the abutment arrangement of the first side edge 731 with one of the flow channel side walls 721 of the side wall piece 72 is also convenient.

[0053] Among them, two side wall pieces 72 can be fixedly connected with one of the heat exchange pieces 71, which can simplify the assembly process of the test section 7; two side wall pieces 72 can also be independent of two heat exchange pieces 71, so as to replace the thickness of the two side wall pieces 72 and adapt to the test of vortex generating structures 73 of different thicknesses.

[0054] In one of the embodiments, the side wall member 72 and / or the vortex generating structure 73 are made of elastic material, that is, when the two heat exchange members 71 are matched with each other, the rectangular flow channel 74 can be ensured to be closed. In a preferred embodiment, the side wall member 72 is made of elastic material, while the vortex generating structure 73 is made of hard material, and the thickness of the side wall member 72 is greater than the thickness of the vortex generating structure 73. At this time, the thickness of the vortex generating structure 73 determines the thickness of the rectangular flow channel 74, and the thickness of the vortex generating structure 73 can be accurately determined, and meanwhile, the matching sealing degree of the side wall member 72 and the heat exchange member 71 can be ensured.

[0055] In one of the embodiments, the two heat exchange members 71 are detachably connected through a plurality of bolts 75. The bolts 75 connect the two heat exchange members 71, which have the advantages of simple and reliable structure, convenient and fast operation, and can adjust the distance between the two heat exchange members 71, so as to facilitate the installation of vortex generating structures 73 with different thicknesses.

[0056] In one of the embodiments, the side wall member 72 is provided with a through hole, and the bolts 75 connecting the two heat exchange members 71 pass through the through hole. In this embodiment, the two side wall members 72 are positioned by the bolts 75 at the same time, so as to avoid the displacement of the side wall member 72 when the two heat exchange members 71 are moved close to each other, which affects the shape and size of the rectangular flow channel 74.

[0057] In one of the embodiments, the heat exchange member 71 and the side wall member 72 are provided with an ear plate on the outside, and the bolt 75 is arranged on the ear plate, so as to simplify the installation difficulty of the heat exchange member 71 and the side wall member 72.

[0058] In one of the embodiments, the heat exchange member 71 is provided with a cooling channel 712 for circulating coolant. The circulating coolant is used for heat exchange with hot air in the rectangular flow channel 74, so as to test the active heat exchange performance of the cooling channel 712. Specifically, the two ends of the cooling channel 712 are respectively a coolant inlet 7121 and a coolant outlet 7122, and the coolant inlet 7121 and the coolant outlet 7122 are used for connecting an external coolant circulating device.

[0059] In one of the embodiments, the incoming air heating section includes an air heating section 1, a front end measuring section 3, a rectifying section 4, a damping net section 5 and a contraction section 6 arranged in sequence. The outlet of the contraction section 6 is connected with the inlet of the rectangular flow channel 74. In addition, a round-to-square adapter 2 can also be arranged between the air heating section 1 and the front end measuring section 3.

[0060] Specifically, the internal flow channel of the air heating section 1 is circular in cross section, and the cross sections of the sections after the round-to-square adapter 2 are all rectangular, and the sections are sequentially connected end to end.

[0061] The air heating section 1 is provided with an electric heating device 11 capable of providing heat to the air. In this embodiment, the electric heating device 11 is composed of a resistance wire and an adjustable transformer. The temperature of the resistance wire is controlled by adjusting the output power of the adjustable transformer, thereby controlling the temperature parameters of the incoming air. The incoming air after adjustment can continuously obtain stable heat.

[0062] The round-to-square adapter section 2 is responsible for converting the circular cross-section flow channel into a rectangular flow channel suitable for testing, facilitating the subsequent rectification section 4 and test section 7.

[0063] The front-end measurement section 3 is responsible for measuring the temperature, pressure and velocity of the air at the front end of the test section. The front-end measurement section 3 is provided with a flow rate sensor 31, a temperature sensor and a pressure sensor. The flow rate sensor 31 can detect the air velocity. The temperature sensor is attached to the inner wall of the front-end measurement section 3 to measure the temperature of the front-end measurement section 3. The pressure sensor is used to measure the pressure in the front-end measurement section 3. The measured velocity, pressure and temperature parameters can be used as feedback for the adjustment of the air heating section 1 and provide basic data for the heat exchange performance of the subsequent test section 7.

[0064] The rectification section 4 is responsible for rectification and turbulence reduction. The purpose of rectification is achieved by uniformly dividing the flow channel into several small-diameter flow channels to destroy large eddies and reduce turbulence. The rectification section 4 can be composed of several rectangular small flow channels 41 (as shown in Figure 6 ) or several hexagonal small flow channels 42 (as shown in Figure 7 ).

[0065] The damping net section 5 is responsible for further reducing the turbulence of the air from the rectification section 4. The small eddies in the air flowing out of the rectification section 4 are further broken into smaller eddies by the multiple layers of metal gauze 51, accelerating the dissipation of eddies in the incoming flow and reducing the turbulence of the air.

[0066] The contraction section 6 mainly adjusts the flow channel to the size required by the rectangular flow channel 74 in the test section 7, and at the same time realizes the purpose of air acceleration by reducing the cross-sectional area of the flow channel, which is closer to the high-temperature and high-speed environment in the aircraft engine. According to the principle of mass conservation, the flow rate is inversely proportional to the cross-sectional area of the flow channel. The air flow rate in the test piece flow channel can be calculated.

[0067] In one embodiment, the measurement section includes a rear-end measurement section 8 and a negative pressure section 9 arranged in sequence. The inlet of the rear-end measurement section 8 is connected to the outlet of the rectangular flow channel 74.

[0068] Specifically, the rear-end measurement section 8 is responsible for measuring the temperature of the air at the rear end of the test section. The temperature measurement can be obtained by attaching a temperature sensor to the inner wall of the rear-end measurement section 8. Finally, the temperature obtained by the rear-end measurement section 8 is compared with the temperature obtained by the front-end measurement section 3 to obtain the heat exchange performance of the test section.

[0069] The negative pressure section 9 is mainly responsible for providing negative pressure at the end of the flow channel. Specifically, a turbine fan 91 is installed inside the negative pressure section 9. The air heating section 1 continuously draws in air from the outside through the negative pressure of the negative pressure section 9 to provide continuous air for the experiment. By adjusting the speed of the turbine fan 91 in the negative pressure section 9, the negative pressure value of the negative pressure zone can be changed, thereby controlling the speed of the incoming air. In addition, the drag coefficient of various vortex generating structures 73 can be inferred based on the power of the turbine fan 91 required to generate the same flow velocity when the same rectangular flow channel 74 is used.

[0070] In this embodiment, the turbine fan 91 and the electric heating device 11 can easily obtain the incoming air with a specified temperature and speed; the combination of the rectifier section 4 and the damping mesh section 5 can obtain a relatively ideal low-turbulence stable incoming air; by introducing excess coolant into the heat exchanger 71, the isobaric test conditions close to the ideal working conditions can be obtained, reducing the processing cost of the test bench; at the same time, by changing the test piece, the heat exchange test of different test pieces can be completed quickly.

[0071] This invention also provides a method for testing heat transfer in a microchannel using a biomimetic structure of tuna gill filaments. The method utilizes the aforementioned experimental apparatus for testing heat transfer in a microchannel using a biomimetic structure of tuna gill filaments and includes the following steps:

[0072] S1. Place the eddy current generating structure 73 to be tested into the rectangular flow channel 74, complete the assembly of the test section 7, and complete the docking of the incoming air heating section, the test section 7 and the measurement section.

[0073] S2. Heated air is supplied to the incoming air heating section. The heated air passes sequentially through the test section 7 and the measurement section, and flows out from the measurement section.

[0074] S3. Obtain the air temperature of the incoming air heating section and the measuring section to complete the performance test of the tested vortex generating structure 73;

[0075] S4. Disassemble the two heat exchange components 71, replace the tested eddy current generating structure 73 with a different size and configuration, or replace the same tested eddy current generating structure 73 with a different installation position and / or a different number, and repeat steps S1-S4. That is, the heat exchange performance test of different test pieces can be completed by replacing test pieces with different structures.

[0076] Specifically, step S2 includes:

[0077] S21. Before the test begins, the air speed is controlled by adjusting the speed of the turbine fan 91, and the temperature is controlled by adjusting the power of the electric heating device 11. During the adjustment process, the flow rate and temperature parameters fed back by the front-end measuring section 3 are precisely adjusted.

[0078] S22, the stable parameter of the incoming air is rectified by the small flow channel of the rectifying section 4, and the flow field of the incoming air is stable and low turbulence, then the air turbulence is further reduced by the damping net section 5, and finally the air is accelerated by the contraction section 6 and flows into the test section 7;

[0079] S23, the test section 7 is filled with a large amount of constant temperature cooling liquid from the cooling liquid inlet 7121 to flow into the cooling channel 712, the heat exchange surface 711 is temperature controlled, and the cooling of the incoming air is realized through the heat exchange surface 711, and then the cooling liquid flows out from the cooling liquid outlet 7122.

[0080] In addition, when comparing the temperature, the power required by the turbine fan 91 to generate the same flow rate can also be used to infer the resistance coefficient of various vortex generating structures 73 when the same rectangular flow channel 74, and then test the more optimal air resistance coefficient and heat exchange effect matching.

[0081] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

Claims

1. A tuna gill filament biomimetic structure micro-channel heat exchange test device, characterized in that, The test section (7) comprises two heat exchange pieces (71), two side wall pieces (72) and at least one vortex generating structure (73) to be measured. The two heat exchange pieces (71) are oppositely arranged and have mutually parallel heat exchange surfaces (711) on opposite sides. The two side wall pieces (72) are oppositely arranged between the two heat exchange pieces (71) and have mutually parallel flow channel side walls (721) on opposite sides. The two heat exchange surfaces (711) and the two flow channel side walls (721) form a rectangular flow channel (74) and the vortex generating structure (73) is arranged in the rectangular flow channel (74). The vortex generating structure (73) comprises oppositely arranged first and second end surfaces (734) and (735). When the two heat exchange pieces (71) are combined, the two heat exchange surfaces (711) abut against the two ends of the side wall piece (72) and the first and second end surfaces (734) and (735) of the vortex generating structure (73) to fix the side wall piece (72) and the vortex generating structure (73). The side wall piece (72) is made of elastic material and the vortex generating structure (73) is made of hard material, and the thickness of the side wall piece (72) is greater than that of the vortex generating structure (73). The two heat exchange pieces (71) are detachably connected by a plurality of bolts (75). The side wall piece (72) is provided with a through hole through which the bolt (75) connecting the two heat exchange pieces (71) passes. The heat exchange piece (71) and the side wall piece (72) are provided with an ear plate on the outside, and the bolt (75) is arranged on the ear plate.

2. The tuna gill filament biomimetic structure micro-channel heat exchange test device of claim 1, characterized in that, The heat exchange piece (71) is provided with a cooling channel (712) for flowing coolant.

3. The tuna gill filament biomimetic structure micro-channel heat exchange test device of claim 1, characterized in that, The vortex generating structure (73) is in the shape of a triangular column and comprises oppositely arranged first and second end surfaces (734) and (735), and first, second and third side edges (731), (732) and (733) in the shape of a rectangular face.

4. The tuna gill filament biomimetic structure micro-channel heat exchange test device of claim 1, characterized in that, The first side edge (731) is arranged in close contact with one of the flow channel side walls (721), the second side edge (732) is close to one side of the incoming air heating section, and the included angle between the second side edge (732) and the flow channel side wall (721) is greater than or equal to 90°; and the third side edge (733) is close to one side of the measuring section, and the included angle between the third side edge (733) and the flow channel side wall (721) is greater than 90°. The incoming air heating section comprises, in sequence, an air heating section (1), a front end measuring section (3), a straightening section (4), a damping net section (5) and a contraction section (6), and the outlet of the contraction section (6) is connected with the inlet of the rectangular flow channel (74).

5. The tuna gill filament biomimetic structure micro-channel heat exchange test device according to any one of claims 1-4, characterized in that, The measuring section comprises, in sequence, a rear end measuring section (8) and a negative pressure section (9), and the inlet of the rear end measuring section (8) is connected with the outlet of the rectangular flow channel (74).

6. The tuna gill filament biomimetic structure micro-channel heat exchange test device according to any one of claims 1-4, characterized in that, The experimental device for the tuna gill filament biomimetic structure micro-channel heat exchange test according to any one of claims 1-6 comprises the following method:

7. A test method for heat exchange in a microchannel with a tuna gill filament biomimetic structure, characterized in that, ​ S1, placing the vortex generating structure (73) to be tested in the rectangular flow channel (74), and completing the assembly of the test section (7), and completing the butt joint of the incoming air heating section, the test section (7) and the measuring section; S2, delivering heated air to the incoming air heating section, and the heated air sequentially passes through the test section (7) and the measuring section, and flows out from the measuring section; S3, obtaining the air temperature of the incoming air heating section and the measuring section, and completing the performance test of the vortex generating structure (73) to be tested; S4, disassembling the two heat exchange members (71), replacing the vortex generating structure (73) to be tested with different sizes and configurations, or replacing the same vortex generating structure (73) to be tested with different installation positions and / or different quantities, and repeating steps S1-S4.

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