Radar antenna array surface non-uniform heat flux heat dissipation structure based on liquid metal

Abstract

The invention discloses a liquid metal-based radar antenna array surface non-uniform heat flux density heat dissipation structure, which comprises an antenna array surface, a radiation unit is mounted on the front surface of the antenna array surface, a liquid cooling plate is mounted on the back surface of the antenna array surface, and a T / R assembly on the antenna array surface is connected with the liquid cooling plate; a gradient porous structure formed based on a three-period minimal curved surface is welded at the bottom of the liquid cooling plate, and the liquid cooling plate is sealed with the liquid cooling shell through a sealing piece; the liquid cooling shell comprises a liquid inlet channel, a liquid outlet channel and a liquid cooling cavity, and liquid metal as cooling liquid exchanges heat with the liquid cooling plate through the liquid inlet channel and the liquid cooling cavity and then flows out through the liquid outlet channel. According to the invention, the liquid metal with high thermal conductivity is adopted as the cooling liquid and is combined with the gradient porous structure formed based on the three-period minimal curved surface, so that the problem of non-uniform heat flux density of the seeker detection radar in the flight process of a hypersonic aircraft is effectively solved, and compared with conventional gas-liquid two-phase flow heat dissipation, the stability is more excellent; and while heat exchange is enhanced, metal consumables can be saved, and the consumption of coolants can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of radar antenna array heat dissipation, and in particular to a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure. Background Art

[0002] In the field of aerospace, the flight speed of hypersonic aircraft in the atmosphere can reach or even exceed 5 times the speed of sound. During the flight, the intense friction between the protective cover and the air will generate a temperature of hundreds or even thousands of degrees Celsius, which may cause the performance of the internal electronic equipment to change or even be damaged. The traditional protective cover-seeker mode can only improve the heat insulation ability by increasing the thickness of the protective cover, which will increase the transmission loss of the seeker detection radar and shorten the effective range. The heat dissipation of the seeker detection radar must not only consider the heat generated by the transceiver components, but also the heat transferred from the protective cover to the radar array. The heat flux borne by the front end of the aircraft is higher, while the middle and rear parts are relatively lower, which causes the heat flux of the radar array to change accordingly. For this reason, a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure is proposed. Summary of the invention

[0003] In response to the above technical problems, the present invention proposes a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure, which can effectively solve the problem of non-uniform heat flux density of the seeker detection radar during the flight of a hypersonic aircraft while ensuring its transmission effective distance.

[0004] To achieve the above object, the technical solution of the present invention is:

[0005] A liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure, comprising:

[0006] The antenna array surface has a radiation unit installed on the front and a liquid cooling plate installed on the back. The T / R components on the antenna array surface are connected to the upper surface of the liquid cooling plate. The lower part of the liquid cooling plate is connected to the liquid cooling shell, and the liquid cooling plate is sealed with the liquid cooling shell through a sealing member.

[0007] The liquid cooling housing comprises a liquid inlet channel, a liquid cooling cavity and a liquid outlet channel which are sequentially arranged along the flow direction of the coolant, wherein a first flow dividing baffle is provided between the liquid inlet channel and the liquid cooling cavity, and a second flow dividing baffle is provided between the liquid cooling cavity and the liquid outlet channel;

[0008] The bottom of the liquid cooling plate is welded with a gradient porous structure formed based on a three-period minimal surface, and the liquid metal as a coolant passes through the liquid inlet channel, the diameter expansion channel, the first flow dividing baffle, the liquid cooling cavity and the gradient porous structure formed based on the three-period minimal surface at the bottom of the liquid cooling plate, and then flows out through the second flow dividing baffle, the diameter reduction channel and the liquid outlet channel in sequence;

[0009] The gradient porous structure formed based on the three-periodic minimal surface is a three-periodic minimal surface unit array, including a plurality of three-periodic minimal surface units with different offsets and interconnected, and the three-periodic minimal surface unit is formed based on a Gyroid surface, and the implicit expression of the Gyroid surface is:

[0010] ;

[0011] Among them, a is the size of the unit body, C is the bias constant, r=(x,y,z), x,y,z are the coordinate variables in three-dimensional space;

[0012] The three-periodic minimal surface unit expression is: Φ(r)≤C;

[0013] The porosity of the gradient porous structure formed based on the three-periodic minimal surface gradually decreases from the liquid inlet channel to the liquid outlet channel, the heat flux density gradually increases, and the variation range of the bias constant is -1~0;

[0014] Among them, the gradient porosity ε satisfies the following linear relationship: ε=-0.328C+0.5, the porosity at the inlet of the liquid metal coolant is 82.8%, and the porosity at the outlet of the liquid metal coolant is 50%;

[0015] The bias constant C satisfies the following linear relationship: C=(1 / L)x-1, where x is the distance from the bias point to the liquid metal coolant inlet, and L is the distance from the liquid metal coolant outlet to the liquid metal coolant inlet;

[0016] The specific surface area of ​​the three-periodic minimal surface unit satisfies the following relationship: S1=2.289C 2 -5.001C+6.102, 1 / mm -1 ;

[0017] The surface area of ​​the three-periodic minimal surface unit satisfies the following relationship: 3 The surface area of ​​the G-type unit volume is S2=-0.79C 2 +3.10.

[0018] Beneficial effects: The present invention adopts liquid metal with a thermal conductivity dozens of times that of water as the coolant and combines it with a gradient porous structure formed based on a three-period minimal surface. The porosity of the gradient porous structure formed based on the three-period minimal surface decreases linearly from the liquid inlet channel to the liquid outlet channel, and the heat flux density gradually increases. The porosity at the coolant inlet is large, the resistance is small and the specific surface area is maximized, so that the solid-liquid ratio in the low heat flow zone is as small as possible, which saves metal consumables to a great extent and meets the heat dissipation requirements near the inlet; the coolant temperature at the outlet increases, and the low porosity and high specific surface area maximize the total surface area on the outlet side, so that more heat from the high heat flow zone can be taken away in time, thereby realizing uniform temperature control of the radar antenna array.

[0019] In addition, the three-periodic minimal surface unit is formed based on a Gyroid-type surface. The porous structure has only one internal flow channel and reduces the difficulty of thickness processing, making it simpler and easier to process.

[0020] The gradient porous structure formed based on the three-periodic minimal surface of the present invention adopts a neutral surface offset structure, and the gradient variation range of the offset amount is -1~0, which can ensure the high specific surface area of ​​the gradient porous structure formed based on the three-periodic minimal surface as a whole, is beneficial to the heat dissipation of the structure and thus saves the amount of metal coolant to the greatest extent.

[0021] In an optional embodiment, the T / R component on the antenna array surface is connected to the liquid cooling plate via a boss, and an interface material is applied between the T / R component and the boss to reduce contact thermal resistance.

[0022] Beneficial effect: In the heat dissipation system of the present invention, the T / R component is tightly fitted to the boss through the interface material, and the heat is efficiently transferred to the liquid cooling plate. The boss size can be flexibly adjusted according to the size of the T / R component and the height of the device. It is not only highly adaptable, but also can effectively reduce the contact thermal resistance, facilitate heat transfer, and ensure the heat dissipation effect.

[0023] In an optional embodiment, in order to reduce the contact thermal resistance, the boss and the liquid cooling plate are designed to be integrated.

[0024] In an optional embodiment, the interface material is liquid metal or thermal conductive silicone grease.

[0025] In an optional embodiment, the liquid inlet channel includes a first straight pipe section and an expanded diameter section connected to the end of the first straight pipe section, the end of the expanded diameter section is connected to one end of the liquid cooling chamber, and the first flow dividing baffle is arranged at the connection between the expanded diameter section and the liquid cooling chamber;

[0026] The liquid outlet channel includes a reduced diameter section and a second straight pipe section connected to the end of the reduced diameter section, wherein the front end of the reduced diameter section is connected to the other end of the liquid cooling chamber, and the second diversion baffle is arranged at the connection between the reduced diameter section and the liquid cooling chamber.

[0027] Beneficial effect: The liquid inlet channel includes a first straight pipe section and an expanded diameter section connected to the end of the straight pipe section. The coolant diffuses in the expanded diameter section, and the flow rate is reduced. The coolant flows evenly into the liquid cooling cavity through multiple diversion channels on the first diversion baffle, ensuring that the coolant flows evenly into the liquid cooling cavity, avoiding uneven local coolant flow, making the heat dissipation of each area of ​​the liquid cooling cavity balanced, improving the overall heat dissipation efficiency, and ensuring stable operation of the equipment;

[0028] The liquid outlet channel includes a reduced diameter section and a second straight pipe section connected to the end of the reduced diameter section. The coolant after heat exchange is compressed in the reduced diameter section, and the flow rate is increased, ensuring that the heat is taken away in time in the high heat flow area.

[0029] In an optional embodiment, the liquid metal is gallium, gallium-indium alloy or gallium-indium-tin alloy that is liquid at room temperature; and the liquid cooling plate is made of copper.

[0030] Beneficial effects: The liquid metal of the present invention is gallium, gallium-indium alloy or gallium-indium-tin alloy that is liquid at room temperature. Its thermal conductivity is dozens of times that of water, which can quickly reduce the temperature of the antenna array surface. It has good fluidity and adaptability, can automatically fill tiny gaps and complex channels, and better adapt to irregular heat dissipation surfaces. Taking gallium-indium-tin alloy as an example, its melting point can be as low as -19°C, and its boiling point can reach about 1300°C. It has a wide operating temperature range and can adapt to different working environments and array surface heating conditions.

[0031] The liquid cooling plate is made of copper. The high thermal conductivity of copper can quickly transfer heat from the liquid cooling plate to the coolant, avoiding possible corrosion, extending the service life of the liquid cooling plate and reducing maintenance costs.

[0032] In an optional embodiment, the first diversion baffle and the second diversion baffle are provided with the same number of diversion channels, and the number of the diversion channels is an even number not less than ten.

[0033] In summary, compared with the prior art, the non-uniform heat flux density heat dissipation structure of the radar antenna array based on liquid metal in the present invention uses liquid metal with a thermal conductivity dozens of times that of water as a coolant and combines it with a gradient porous structure formed based on a three-period minimal surface to effectively solve the problem of non-uniform heat flux density of the seeker detection radar during the flight of a hypersonic aircraft, ensuring its transmission range. Compared with the steam blocking effect and oscillation phenomenon that are very easy to occur in gas-liquid two-phase flow heat dissipation, the present invention has better stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an exploded diagram of a heat dissipation structure of a radar antenna array surface with non-uniform heat flux density based on liquid metal according to an embodiment of the present invention;

[0035] Figure 2 is a side schematic diagram of a liquid cooling plate according to an embodiment of the present invention;

[0036] Figure 3 is an axonometric schematic diagram of a flow diversion baffle according to an embodiment of the present invention;

[0037] Figure 4 Schematic diagram of a heat dissipation structure of a radar antenna array with non-uniform heat flux density based on liquid metal according to an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of a gradient porous structure formed based on a Gyroid-type three-periodic minimal surface according to an embodiment of the present invention;

[0039] Figure 6 4 is a relationship diagram between various parameters of the Gyroid unit and the offset C according to an embodiment of the present invention.

[0040] Reference numerals:

[0041] 1. Antenna array surface; 2. Liquid cooling plate; 3. Liquid cooling shell; 4. Radiating unit; 5. T / R assembly; 6. Boss; 7. Gradient porous structure formed based on three-periodic minimal surface; 8. Seal; 9. Liquid inlet channel; 10. Liquid outlet channel; 11-1. First diverter baffle; 11-2. Second diverter baffle; 12. Liquid cooling chamber; 13. Interface material; 14. Gyroid unit; 15. Gyroid surface. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to make the technical solution of the present invention clearer, and cannot be used to limit the protection scope of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0043] Example 1

[0044] See also Figure 1 The present invention discloses a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure, comprising: an antenna array surface 1, a radiation unit 4 is installed on the front of the antenna array surface 1, a liquid cooling plate 2 is installed on the back of the antenna array surface 1, and a T / R component 5 on the antenna array surface 1 is connected to the liquid cooling plate 2.

[0045] See also Figure 2 The bottom of the liquid cooling plate 2 is welded with a gradient porous structure 7 formed based on a Gyroid-type three-periodic minimal surface, which is integrally formed, and the liquid cooling plate 2 is sealed with the liquid cooling housing 3 through a seal 8.

[0046] See also Figure 1 and Figure 4The liquid-cooled housing comprises a liquid inlet channel 9, a liquid cooling cavity 12 and a liquid outlet channel 10 which are sequentially arranged along the flow direction of the coolant, wherein a first flow diversion baffle 11-1 is provided between the liquid inlet channel 9 and the liquid cooling cavity 12, and a second flow diversion baffle 11-2 is provided between the liquid cooling cavity 12 and the liquid outlet channel 10. A gradient porous structure 7 formed based on a three-period minimal surface is welded to the bottom of the liquid cooling plate 2. Liquid metal as a coolant passes through the liquid inlet channel 9, the first flow diversion baffle 11, the liquid cooling cavity 12 and the gradient porous structure 7 formed based on a three-period minimal surface at the bottom of the liquid cooling plate 2, and then flows out through the second flow diversion baffle and the liquid outlet channel 10 in sequence after heat exchange, taking away the non-uniform heat transmitted from the protective cover to the radar array surface and the heat generated by the T / R component 5.

[0047] See also Figure 2 , Figure 5 and Figure 6 In this embodiment, the gradient porous structure 7 formed based on the three-periodic minimal surface is a three-periodic minimal surface unit array, including a plurality of three-periodic minimal surface units 14 with different offsets and interconnected, and the three-periodic minimal surface unit 14 is formed based on the Gyroid surface 15. Specifically, the implicit expression of the Gyroid surface 15 is:

[0048] ;

[0049] Among them, a is the size of the unit cell, C is the bias constant, r=(x,y,z), x,y,z are the coordinate variables in three-dimensional space.

[0050] Specifically, the expression of the three-periodic minimal surface unit 14 is:

[0051] ;

[0052] The porosity of the gradient porous structure 7 formed based on the three-periodic minimal surface gradually decreases from the liquid inlet channel 9 to the liquid outlet channel 10, and the heat flux density gradually increases, and the offset value changes in the range of -1 to 0;

[0053] Among them, the gradient porosity ε satisfies the following linear relationship: ε=-0.328C+0.5, the porosity at the inlet of the liquid metal cooling liquid is 82.8%, and the porosity at the outlet is 50%; the offset C satisfies the following linear relationship: C=(1 / L)x-1, x is the distance from the offset to the inlet, and L is the distance from the outlet to the inlet.

[0054] The specific surface area of ​​the three-periodic minimal surface unit 14 satisfies the following relationship: S1=2.289C 2 -5.001C+6.102, 1 / mm -1, when C∈[-1,1], S1 gradually decreases, and the specific surface area at the inlet of the liquid metal cooling liquid is 13.392, 1 / mm -1 The specific surface area at the outlet is 6.102, 1 / mm -1 .

[0055] The surface area of ​​the three-periodic minimal surface unit 14 satisfies the following relationship: 3 The surface area of ​​the G-type unit volume is S2=-0.79C 2 +3.10, when C∈[-1,1], S2 reaches its maximum value when C=0.

[0056] As a preferred embodiment of Example 1, the liquid metal is gallium, gallium-indium alloy or gallium-indium-tin alloy which is liquid at room temperature.

[0057] The liquid cooling plate 2 is made of copper.

[0058] This embodiment uses liquid metal with a thermal conductivity dozens of times that of water as a coolant and combines it with a gradient porous structure formed based on a three-period minimal surface. The porosity of the gradient porous structure formed based on the three-period minimal surface decreases linearly from the liquid inlet channel to the liquid outlet channel, and the heat flux density gradually increases. The porosity at the coolant inlet is large, the resistance is small, and the specific surface area is maximized, so that the solid-liquid ratio in the low heat flow zone is as small as possible, which saves metal consumables to a great extent and meets the heat dissipation requirements near the inlet; the coolant temperature at the outlet increases, and the low porosity and high specific surface area maximize the total surface area on the outlet side, so that more heat from the high heat flow zone can be taken away in time, thereby achieving uniform temperature control of the radar antenna array.

[0059] In addition, the three-periodic minimal surface unit is formed based on a Gyroid-type surface. The porous structure has only one internal flow channel and reduces the difficulty of thickness processing, making it simpler and easier to process.

[0060] The gradient porous structure formed based on the three-periodic minimal surface of the present invention adopts a neutral surface offset structure, and the gradient variation range of the offset amount is -1~0, which can ensure the high specific surface area of ​​the gradient porous structure formed based on the three-periodic minimal surface as a whole, is beneficial to the heat dissipation of the structure and thus saves the amount of metal coolant to the greatest extent.

[0061] Example 2

[0062] The difference between this embodiment and embodiment 1 is that in the heat dissipation system of the present invention, in order to enable the T / R component to efficiently conduct heat to the liquid cooling plate, the T / R component 5 on the antenna array surface 1 is connected to the liquid cooling plate 2 through the boss 6, and an interface material 13 is applied between the T / R component 5 and the boss 6 to reduce the contact thermal resistance.

[0063] On the other hand, the size of the boss 6 can be adjusted according to the size of the T / R assembly 5, and the height can be adjusted according to the height of different components, so it has strong adaptability.

[0064] As a preferred technical solution of Example 2, the interface material 13 is liquid metal or thermal conductive silicone grease.

[0065] Example 3

[0066] This embodiment is a further optimization of the second embodiment. To reduce the contact thermal resistance, the boss 6 and the liquid cooling plate 2 are designed to be integrated.

[0067] Example 4

[0068] The liquid inlet channel 9 includes a first straight pipe section and an expanded diameter section connected to the end of the first straight pipe section, the end of the expanded diameter section is connected to one end of the liquid cooling chamber, and the first flow dividing baffle is arranged at the connection between the expanded diameter section and the liquid cooling chamber;

[0069] The liquid outlet channel 10 includes a reduced diameter section and a second straight pipe section connected to the end of the reduced diameter section, wherein the front end of the reduced diameter section is connected to the other end of the liquid cooling chamber, and the second diversion baffle is arranged at the connection between the reduced diameter section and the liquid cooling chamber.

[0070] The liquid inlet channel includes a first straight pipe section and an expanded diameter section connected to the end of the straight pipe section. The coolant diffuses in the expanded diameter section, and the flow rate is reduced. The coolant flows evenly into the liquid cooling cavity through the multiple diversion channels on the first diversion baffle, ensuring that the coolant flows evenly into the liquid cooling cavity, avoiding uneven local coolant flow, and making the heat dissipation of each area of ​​the liquid cooling cavity balanced, thereby improving the overall heat dissipation efficiency and ensuring stable operation of the equipment;

[0071] The liquid outlet channel includes a reduced diameter section and a second straight pipe section connected to the end of the reduced diameter section. The coolant after heat exchange is compressed in the reduced diameter section, and the flow rate is increased, ensuring that the heat is taken away in time in the high heat flow area.

[0072] See also Figure 3 The first diversion baffle plate and the second diversion baffle plate are provided with the same number of diversion channels, and the number of the diversion channels is an even number not less than 10. In this embodiment, 16 branch channels are respectively provided on the first diversion baffle plate and the second diversion baffle plate, so that the coolant flows evenly into the liquid cooling chamber 12.

[0073] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0074] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure, characterized in that: include: An antenna array surface (1) having a radiation unit (4) mounted on its front side and a liquid cooling plate (2) mounted on its back side, wherein a T / R component on the antenna array surface is connected to the upper surface of the liquid cooling plate, the lower part of the liquid cooling plate (2) is connected to a liquid cooling housing (3), and the liquid cooling plate (2) is sealed with the liquid cooling housing (3) via a sealing member (8); The liquid cooling housing (3) comprises a liquid inlet channel (9), a liquid cooling cavity (12), and a liquid outlet channel (10) arranged in sequence along the flow direction of the cooling liquid, wherein a first flow dividing baffle is provided between the liquid inlet channel (9) and the liquid cooling cavity, and a second flow dividing baffle is provided between the liquid cooling cavity and the liquid outlet channel (10); A gradient porous structure (7) formed based on a three-period minimal surface is welded to the bottom of the liquid cooling plate (2); liquid metal as a coolant passes through a liquid inlet channel (9), a first flow dividing baffle (11), a liquid cooling cavity (12), and exchanges heat with the gradient porous structure (7) formed based on a three-period minimal surface at the bottom of the liquid cooling plate (2), and then flows out through a second flow dividing baffle and the liquid outlet channel (10); The gradient porous structure (7) formed based on the three-periodic minimal surface is a three-periodic minimal surface unit array, comprising a plurality of three-periodic minimal surface units (14) having different offsets and connected to each other. The three-periodic minimal surface unit (14) is formed based on a Gyroid surface (15). The implicit expression of the Gyroid surface (15) is: ； Among them, a is the size of the unit body, C is the bias constant, r=(x,y,z), x,y,z are the coordinate variables in three-dimensional space; The three-periodic minimal surface unit (14) is expressed as: Φ(r)≤C; The porosity of the gradient porous structure (7) formed based on the three-periodic minimal surface gradually decreases from the liquid inlet channel (9) to the liquid outlet channel (10), and the heat flux density gradually increases, and the variation range of the bias constant is -1 to 0; Among them, the gradient porosity ε satisfies the following linear relationship: ε=-0.328C+0.5, the porosity at the inlet of the liquid metal coolant is 82.8%, and the porosity at the outlet of the liquid metal coolant is 50%; The bias constant C satisfies the following linear relationship: C=(1 / L)x-1, where x is the distance from the bias point to the liquid metal coolant inlet, and L is the distance from the liquid metal coolant outlet to the liquid metal coolant inlet; The specific surface area of ​​the three-periodic minimal surface unit (14) satisfies the following relationship: S1=2.289C 2 -5.001C+6.102, 1 / mm -1 ; The surface area of ​​the three-periodic minimal surface unit (14) satisfies the following relationship: for 1×1×1 mm 3 The surface area of ​​the G-type unit volume is S2=-0.79C 2 +3.

10.

2. According to claim 1, a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure is characterized by: The T / R component (5) on the antenna array surface (1) is connected to the liquid cooling plate (2) via a boss (6), and an interface material (13) is applied between the T / R component (5) and the boss (6) to reduce contact thermal resistance.

3. According to claim 1, a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure is characterized by: In order to reduce the contact thermal resistance, the boss (6) and the liquid cooling plate (2) are designed to be integrated.

4. According to claim 1, a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure is characterized by: The interface material (13) is liquid metal or thermally conductive silicone grease.

5. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The liquid metal is gallium, gallium-indium alloy or gallium-indium-tin alloy which is liquid at room temperature.

6. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The liquid inlet channel (9) comprises a first straight pipe section and an expanded diameter section connected to the end of the first straight pipe section, the end of the expanded diameter section is connected to one end of the liquid cooling chamber, and the first flow dividing baffle is arranged at the connection between the expanded diameter section and the liquid cooling chamber; The liquid outlet channel (10) comprises a reduced diameter section and a second straight pipe section connected to the end of the reduced diameter section, wherein the front end of the reduced diameter section is connected to the other end of the liquid cooling chamber, and the second flow dividing baffle is arranged at the connection between the reduced diameter section and the liquid cooling chamber.

7. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The liquid cooling plate (2) is made of copper.

8. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The first flow diversion baffle and the second flow diversion baffle are provided with the same number of flow diversion channels, and the number of the flow diversion channels is an even number not less than 10.

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