Honeycomb-like liquid cooling plate flow channel and design method thereof

Abstract

The invention relates to a honeycomb-like liquid cooling plate flow channel and a design method thereof, belongs to the technical field of electronic heat dissipation of aircrafts, and solves the problems of large occupied space and large flow resistance of heat source equipment in an existing aircraft heat dissipation system. A honeycomb-like liquid cooling plate flow channel is arranged in a rectangular liquid cooling plate and comprises a honeycomb flow channel net, a first collection flow channel, a second collection flow channel, a parallel linear flow channel, a flow channel inlet and a flow channel outlet, the flow channel inlet and the flow channel outlet are symmetrically formed in the centers of the left and right sides of the liquid cooling plate respectively, and the flow channel inlet is formed in the center of the right side of the liquid cooling plate and communicates with the first collection flow channel; the runner outlet is formed in the center of the left side plate of the liquid cooling plate and communicated with the second converging runner; the first collecting flow channel and the second collecting flow channel are square, the first collecting flow channel and the second collecting flow channel are connected with the N parallel linear flow channels respectively, and the parallel linear flow channels are connected with the honeycomb type flow channel net. The honeycomb-like liquid cooling plate runner is applied to heat source equipment, and is small in space and low in flow resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic heat dissipation for aircraft, and particularly to a honeycomb-like liquid-cooled plate flow channel and a design method thereof. Background Art

[0002] With the continuous improvement of the working efficiency of modern aircraft, the electronic devices inside the aircraft, such as navigation systems and control systems, are facing more severe working conditions. Firstly, the continuous improvement of working performance (such as detection range, resolution, etc.) leads to a continuous increase in the power consumption of the devices; secondly, the design of the aircraft platform tends to be lightweight and miniaturized, resulting in a higher degree of device integration and a further increase in the heat flux density; thirdly, with the increase in the flight time of the aircraft, the electronic devices face a longer working time. In summary, the aircraft platform is facing severe challenges of high power consumption, long working hours, and high heat flux density.

[0003] The existing heat control measures for aircraft platforms generally use two types of technologies. One is the passive cooling measure based on phase change materials, and its disadvantage is that this passive consumption-type cold source can only support the device to work for a limited time; the other is the use of compression refrigeration, and its disadvantage is that it consumes a huge amount of electric energy and has a large volume and mass itself.

[0004] Therefore, it is of great significance to design a heat source device that can be applied to the heat dissipation system of the aircraft platform, which can meet the requirements of small space occupied by the aircraft platform, long continuous working time, small flow resistance, and large heat dissipation area under the conditions of high heat transfer and low flow resistance. Summary of the Invention

[0005] In view of the above analysis, the embodiments of the present invention aim to provide a honeycomb-like liquid-cooled plate flow channel and a design method thereof, so as to solve the problems that the heat source device of the heat dissipation system occupies a large space and has a large flow resistance on the aircraft platform when working under high power, long working hours, and high heat flux density.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] On the one hand, the present invention provides a honeycomb-like liquid-cooled plate flow channel, which is arranged in a rectangular liquid-cooled plate and includes a honeycomb-like flow channel network, a first collecting flow channel, a second collecting flow channel, parallel straight flow channels, a flow channel inlet, and a flow channel outlet;

[0008] The flow channel inlet and the flow channel outlet are symmetrically arranged at the centers of the left and right sides of the liquid-cooled plate respectively. The flow channel inlet is arranged at the center of the right side of the liquid-cooled plate and is connected to the first collecting flow channel; the flow channel outlet is arranged at the center of the left side of the liquid-cooled plate and is connected to the second collecting flow channel;

[0009] The first converging flow channel and the second converging flow channel are square. The first converging flow channel and the second converging flow channel are respectively connected to N parallel straight flow channels, and the parallel straight flow channels are connected to a honeycomb-shaped flow channel network.

[0010] Further, the honeycomb-shaped flow channel network is axially symmetric.

[0011] Further, the honeycomb-shaped flow channel network is composed of the arrangement of a number of micro-channel units in the shape of regular hexagons. Adjacent micro-channel units share a common flow channel tube, and each unit is interconnected through the common flow channel, forming a honeycomb-like shape as a whole.

[0012] Further, the flow channel spacing of the parallel straight flow channels and the regular hexagon micro-channels in the honeycomb-shaped flow channel network satisfies:

[0013] 1.5*W ≤ K ≤ 3*W;

[0014] Wherein, W is the flow channel width, in mm;

[0015] K is the flow channel spacing, in mm.

[0016] Further, the equivalent diameters of the flow channel inlet and the flow channel outlet are equal.

[0017] Further, the equivalent diameters of the flow channel inlet and the flow channel outlet satisfy:

[0018] D ≥ N*W;

[0019] Wherein, D is the equivalent diameter of the flow channel inlet and the flow channel outlet, in mm;

[0020] W is the flow channel width, in mm;

[0021] N is the number of parallel straight flow channels connected to the first converging flow channel, in number.

[0022] Further, the widths of the first converging flow channel and the second converging flow channel are equal, satisfying:

[0023] W1 ≥ D;

[0024] Wherein, D is the equivalent diameter of the flow channel inlet and the flow channel outlet, in mm;

[0025] W1 is the width of the first converging flow channel and the second converging flow channel, in mm.

[0026] On the other hand, the present invention also provides a design method for a honeycomb-like liquid cooling plate flow channel, which is used to design the above-mentioned honeycomb-like liquid cooling plate flow channel, and includes the following steps:

[0027] S1: Obtain an actually available rectangular liquid cooling plate bottom plate;

[0028] S2: Design the preliminary shape and dimensions of the honeycomb-like liquid cooling plate flow channel to obtain the dimensions and shape of the target flow channel;

[0029] S3: According to the dimensions and shape of the target flow channel, use the sketch tool of the modeling software to draw the basic shape and dimensions of the flow channel on a plane;

[0030] S4: Use the feature tool of the modeling software to convert the sketch into a 3D solid to obtain the first honeycomb-like liquid cooling plate flow channel model;

[0031] S5: Use the modeling software to extract the inner cavity model of the first honeycomb-like liquid cooling plate flow channel model, import it into the simulation software for mesh generation, boundary condition setting, working fluid property parameter and solution parameter setting, and perform the solution to obtain the flow resistance, flow rate and average temperature of the flow channel;

[0032] S6: Analyze the flow resistance, flow rate and average temperature of the flow channel obtained in step S5. According to the analysis results, optimize the structure of the first honeycomb-like liquid cooling plate flow channel model to obtain the second honeycomb-like liquid cooling plate flow channel model;

[0033] Perform a simulation analysis on the flow resistance, flow rate and average temperature of the second honeycomb-like liquid cooling plate flow channel model. According to the simulation analysis results of the second honeycomb-like liquid cooling plate flow channel model and the first honeycomb-like liquid cooling plate flow channel model, judge whether the simulation analysis results meet the stop iteration condition. If they meet, determine the second honeycomb-like liquid cooling plate flow channel model as the final liquid cooling plate flow channel model. If they do not meet, optimize the structure of the second honeycomb-like liquid cooling plate flow channel model and repeat the simulation analysis until the Nth honeycomb-like liquid cooling plate flow channel model obtained after N iterations meets the stop iteration condition, which is the final honeycomb-like liquid cooling plate flow channel model.

[0034] Further, in step S5, the scale of the mesh is 0.01 times the diameter of the flow channel inlet.

[0035] Further, in step S6, the condition for stopping iteration is: the flow resistance of the (N - 1)th honeycomb-like liquid cooling plate flow channel model is P N-1 , the flow resistance of the Nth honeycomb-like liquid cooling plate flow channel model is P N , when abs(P N - P N-1 ) / P N-1 ≤ 0.01, stop the iteration to obtain the final honeycomb-like liquid cooling plate flow channel model.

[0036] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects:

[0037] 1. The liquid cooling plate flow channel of the present invention is a honeycomb shape as a whole in a rhombus shape, including a honeycomb flow channel network, a first collecting flow channel, a second collecting flow channel, parallel straight flow channels, a flow channel inlet and a flow channel outlet; the first collecting flow channel and the second collecting flow channel are respectively connected to N parallel straight flow channels, and the parallel straight flow channels are connected to the flow channel network forming the honeycomb shape; the honeycomb flow channel network constitutes the main flow channel, which is axially symmetric as a whole and is composed of several regular hexagon-shaped micro flow channel units arranged. Adjacent micro flow channel units share a common flow channel tube, and each unit is interconnected through the common flow channel, forming a honeycomb-like shape as a whole and covering the entire liquid cooling plate; applying this imitation honeycomb liquid cooling plate flow channel to the liquid cooling plate inside the aircraft as a heat source device, it can maintain the continuous operation of electronic devices for more than 2 hours under the condition of occupying a relatively small space in the aircraft platform cabin.

[0038] 2. When the imitation honeycomb liquid cooling plate flow channel of the present invention is applied to a heating device with a heat flux density of 50 W / cm 2 in the aircraft platform, it has a relatively small flow resistance and a relatively large heat exchange area.

[0039] 3. The imitation honeycomb liquid cooling plate flow channel of the present invention is applied to the liquid cooling plate inside the aircraft and is suitable for the harsh working conditions of low air pressure, high acceleration, and large-scale shock vibration in the aircraft platform.

[0040] 4. The imitation honeycomb liquid cooling plate flow channel of the present invention is applied to the liquid cooling plate inside the aircraft. By means of a circulation pipeline, the heat generated by the electronic device is transported to the cold source device, realizing the application requirements of the heat source device in the aircraft cooling system for occupying a small space in the aircraft platform, having a long continuous working time, having a small flow resistance under a high heat flux density, and having a large heat dissipation area; when the imitation honeycomb liquid cooling plate flow channel of the present invention is applied to the aircraft heat source device, the flow resistance ≤ 900 Pa and the highest temperature of the heat source ≤ 80 °C.

[0041] In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present invention will be described in the subsequent specification, and some advantages can be made obvious from the specification or understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained from the content specifically pointed out in the specification and the drawings. Description of the Drawings

[0042] The drawings are only for the purpose of showing specific embodiments and are not considered to be a limitation of the present invention. Throughout the drawings, the same reference signs represent the same components.

[0043] Figure 1 It is a schematic diagram of the imitation honeycomb liquid cooling plate flow channel of Embodiment 1 of the present invention;

[0044] Figure 2 It is a pressure contour map of the imitation honeycomb liquid cooling plate flow channel of Embodiment 1 of the present invention;

[0045] Figure 3 This is the temperature contour map of the honeycomb-like liquid cooling plate flow channel in Embodiment 1 of the present invention;

[0046] Figure 4 This is the structural diagram of the ground verification system in Embodiment 1 of the present invention.

[0047] Reference numerals: 1 - flow channel inlet; 2 - flow channel outlet; 3 - first converging flow channel; 4 - second converging flow channel; 5 - honeycomb-like flow channel network; 6 - parallel straight flow channels; A - A - cross-section direction; W - rectangular width of the cross-section of the flow channel in the A - A direction; H - rectangular height of the cross-section of the flow channel in the A - A direction; K - flow channel spacing. Detailed implementation manners

[0048] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present invention to explain the principles of the present invention, rather than to limit the scope of the present invention.

[0049] The present invention provides a honeycomb-like liquid cooling plate flow channel disposed in a rectangular liquid cooling plate, including a honeycomb-like flow channel network, a first converging flow channel, a second converging flow channel, parallel straight flow channels, a flow channel inlet, and a flow channel outlet;

[0050] The flow channel inlet and the flow channel outlet are symmetrically disposed at the centers of the left and right sides of the liquid cooling plate respectively. Among them, the flow channel inlet is disposed at the center of the right side of the liquid cooling plate and is connected to the first converging flow channel; the flow channel outlet is disposed at the center of the left side of the liquid cooling plate and is connected to the second converging flow channel;

[0051] The first converging flow channel and the second converging flow channel are respectively connected to N parallel straight flow channels, and the parallel straight flow channels are connected to the flow channel network forming a honeycomb-like shape;

[0052] Viewed from the overall structure, the liquid cooling plate flow channel is a rhombus-shaped honeycomb-like. The first converging flow channel and the second converging flow channel are respectively parallel and symmetrically disposed on the opposite sides of the rhombus. The first converging flow channel is connected to the honeycomb-like flow channel network through N parallel straight flow channels, and the second converging flow channel is connected to the honeycomb-like flow channel network through N parallel straight flow channels; the flow channel inlet is disposed at the middle position of the first converging flow channel; the flow channel outlet is disposed at the middle position of the second converging flow channel, and the axes of the flow channel inlet and the flow channel outlet are parallel and pass through the center of the rhombus.

[0053] The honeycomb-like flow channel network constitutes the main flow channel, which is axially symmetric as a whole and is composed of an arrangement of a plurality of regular hexagon-shaped micro flow channel units. Adjacent micro flow channel units share a common flow channel pipe, and each unit is interconnected through the common flow channel, forming a honeycomb-like shape as a whole.

[0054] Particularly, the lengths of the N parallel straight channels connecting the first collecting channel and the honeycomb channel network are equal to the side length of the regular hexagon of the honeycomb channel network. The lengths of the N parallel straight channels connecting the second collecting channel and the honeycomb channel network are also equal to the side length of the regular hexagon of the honeycomb channel network. And if the number of regular hexagons on a single side of the rhombic honeycomb liquid cooling plate channel is n, then the number N of the parallel straight channels connecting the first collecting channel or the second collecting channel and the honeycomb channel network is n + 1.

[0055] Regarding the setting of the lengths and numbers of the parallel straight channels, it can be understood that the first collecting channel constitutes the set of adjacent two sides of multiple regular hexagons on a single side of the rhombic honeycomb liquid cooling plate channel, and the channel width of the first collecting channel is set to be much larger than the channel width of the regular hexagon of the honeycomb channel network; the second collecting channel constitutes the set of adjacent two sides of multiple regular hexagons on a single side of the rhombic honeycomb liquid cooling plate channel, and the channel width of the second collecting channel is set to be much larger than the channel width of the regular hexagon of the honeycomb channel network. When the medium flows into the first collecting channel from the channel inlet, it can uniformly and stably fill each channel of the honeycomb channel network and uniformly and stably converge to the second collecting channel. When the liquid cooling plate channel satisfies the above structure, when the medium flows into the liquid cooling plate channel from the channel inlet, the medium can traverse the entire liquid cooling plate with a relatively small flow resistance along with the honeycomb channel network, and at the same time, the temperature distribution of the liquid cooling plate can be made uniform.

[0056] It should be noted that along the direction away from the channel inlet, the number of regular hexagons in the next vertical layer of regular hexagon-shaped microchannel units connected to the N parallel straight channels is N, and the number of regular hexagons in the next vertical layer of regular hexagon-shaped microchannel units is N + 1. The number of regular hexagons in each vertical layer of hexagon-shaped microchannel units increases by one level by level until the distance between a certain vertical layer of regular hexagon-shaped microchannel units and the upper and lower sides of the liquid cooling plate ≤ 4 mm, then the increase in the number of regular hexagons in the vertical regular hexagon-shaped microchannel units stops, and then the number of regular hexagons in the next vertical layer of regular hexagon-shaped microchannel units decreases level by level until the number of regular hexagons in the last vertical layer of regular hexagon-shaped microchannel units is N, ensuring that the overall honeycomb channel network is axisymmetric and covers the entire liquid cooling plate; preferably, N > 5. This honeycomb channel network structure ensures that when the medium flows into the first collecting channel from the channel inlet, it will not flow away quickly in one channel. When the entire channel is filled with the medium after a period of time, the fluid inflow and outflow reach equilibrium, and the medium in the liquid cooling plate fills the entire channel at any time and flows in each channel.

[0057] The channels in the parallel straight channels and the hexagonal micro-channel units in the honeycomb channel network have a channel width of W, a channel height of H, and a channel spacing of K, satisfying 1.5*W ≤ K ≤ 3*W. Meeting this condition for the channel spacing can improve the heat dissipation effect of the liquid cooling plate and balance the convective heat transfer and heat conduction of the liquid cooling plate.

[0058] The equivalent diameters of the channel inlet and the channel outlet are the same, satisfying D ≥ N*W. Meeting this condition for the diameters of the channel inlet and the channel outlet can ensure sufficient flow supply of the medium at the channel inlet and outlet.

[0059] The first converging channel and the second converging channel are rectangular, with equal widths of W1, and W1 = 1.5N*W. Meeting this condition can further ensure that the medium flowing into the above-mentioned converging channels has a smaller resistance and a larger flow rate relative to the medium flowing into the channels of the honeycomb channel network, and the medium flows uniformly and stably in the channel network.

[0060] The present invention also provides a design method for the honeycomb-like liquid cooling plate channels for manufacturing the above-mentioned honeycomb-like liquid cooling plate channels, including the following steps:

[0061] S1: Obtain an actually available rectangular liquid cooling plate bottom plate;

[0062] S2: Design the preliminary shape and size of the honeycomb-like liquid cooling plate channels to obtain the size and shape of the target channels;

[0063] S3: According to the size and shape of the target channels, use the sketch tool of the modeling software to draw the basic shape and size of the channels on a plane;

[0064] S4: Use the feature tool of the modeling software to convert the sketch into a three-dimensional entity to obtain the first honeycomb-like liquid cooling plate channel model;

[0065] S5: Use the modeling software to extract the inner cavity model of the first honeycomb-like liquid cooling plate channel model, import it into the simulation software for mesh generation, boundary condition setting, working fluid property parameter and solution parameter setting, and perform a solution to obtain the channel flow resistance, channel flow rate, and average temperature;

[0066] S6: Analyze the channel flow resistance, channel flow rate, and average temperature obtained in step S5, and optimize the structure of the first honeycomb-like liquid cooling plate channel model according to the analysis results to obtain the second honeycomb-like liquid cooling plate channel model;

[0067] Simulate and analyze the flow resistance, flow rate, and average temperature of the flow channels of the second honeycomb-like liquid cooling plate flow channel model. According to the simulation analysis results of the second honeycomb-like liquid cooling plate flow channel model and the first honeycomb-like liquid cooling plate flow channel model, determine whether the simulation analysis results meet the stop iteration condition. If they meet, determine the second honeycomb-like liquid cooling plate flow channel model as the final liquid cooling plate flow channel model. If they do not meet, optimize the structure of the second honeycomb-like liquid cooling plate flow channel model, repeat the simulation analysis until the Nth honeycomb-like liquid cooling plate flow channel model obtained after N iterations meets the stop iteration condition, which is the final honeycomb-like liquid cooling plate flow channel model.

[0068] Specifically, in step S2, design the preliminary shape and size of the honeycomb-like liquid cooling plate flow channel to obtain the size and shape of the target flow channel, including the following steps:

[0069] S21: Respectively set a flow channel inlet and a flow channel outlet at the centers of the left and right side edges of the bottom plate of the liquid cooling plate to determine the positions and sizes of the flow channel inlet and the flow channel outlet.

[0070] Specifically, the flow channel inlet and the flow channel outlet are symmetrically arranged at the centers of the left and right side edges of the liquid cooling plate. Among them, the flow channel inlet is set at the center of the right side edge of the liquid cooling plate; the flow channel outlet is set at the center of the left side plate of the liquid cooling plate.

[0071] S22: Respectively set a square first converging flow channel and a second converging flow channel on the bottom plate of the liquid cooling plate. The first converging flow channel is connected to the flow channel inlet, and the second converging flow channel communicates with the flow channel outlet.

[0072] S23: Set N parallel straight flow channels on the bottom plate of the liquid cooling plate that are connected to the first converging flow channel. Then, along the direction away from the flow channel inlet, set regular hexagon-shaped micro-channel units in the next vertical layer connected to the N parallel straight flow channels. The number of regular hexagons in the regular hexagon-shaped micro-channel units is N. Sequentially set vertical layers of regular hexagon-shaped micro-channel units. The number of regular hexagons in the regular hexagon-shaped micro-channel units of each vertical layer increases by one level by level until the distance between the regular hexagon-shaped micro-channel units of a certain vertical layer and the upper and lower side edges of the liquid cooling plate ≤ 4 mm, then stop increasing the number of regular hexagons in the regular hexagon-shaped micro-channel units of the vertical layer. Then, sequentially decrease the number of regular hexagons in the regular hexagon-shaped micro-channel units of the next vertical layer level by level until the number of regular hexagons in the regular hexagon-shaped micro-channel units of the last vertical layer is N, forming a honeycomb-like flow channel network.

[0073] S24: Set N parallel straight flow channels on the bottom plate of the liquid cooling plate to connect to the second converging flow channel and the honeycomb-like flow channel network to obtain the size and shape of the target flow channel.

[0074] Among them, for the flow channels in the parallel straight flow channels and the hexagonal micro-channel units in the honeycomb-shaped flow channel network, the flow channel width is W, the flow channel height is H, and the flow channel spacing is K, satisfying 1.5*W≤K≤3*W.

[0075] Specifically, in step S5, the inner cavity model of the first honeycomb-like liquid cooling plate flow channel is extracted using modeling software, imported into the simulation software for mesh generation, and mesh independence analysis is performed. The mesh scale is D / 100, which can balance the simulation efficiency and accuracy.

[0076] Then, boundary conditions are set. The boundary conditions are as follows: At the inlet position of the flow channel, velocity and temperature boundary conditions are set, with the velocity value being 3.5 - 4 L / min and the temperature value being 10 - 20 °C; at the outlet position of the flow channel, a pressure boundary condition is set, with the pressure value being 0 - 0.1 MPa; on one side surface of the liquid cooling plate, a heat boundary condition is set, with the heat flux being 50 W / m 2 .

[0077] Set the physical property parameters of the working fluid, including the density, specific heat capacity, and viscosity of the working fluid.

[0078] The solution parameters are the number of calculation steps and the convergence residual. The number of calculation steps ≥ 500, and the convergence residual ≤ 1E - 6; then, simulation operations are performed for solution to obtain the flow resistance of the flow channel, the flow rate of the medium flow channel, and the average temperature.

[0079] Specifically, in step S6, the condition for stopping iteration is: the flow resistance of the (N - 1)th honeycomb-like liquid cooling plate flow channel model is P N-1 , and the flow resistance of the Nth honeycomb-like liquid cooling plate flow channel model is P N , when abs(P N - P N-1 ) / P N-1 ≤0.01, stop the iteration to obtain the final honeycomb-like liquid cooling plate flow channel model.

[0080] Specifically, in step S6, the structure optimization includes adjusting the equivalent diameters of the flow channel inlet and the flow channel outlet to satisfy D≥N*W and widening the widths W1 of the first collecting flow channel and the second collecting flow channel to satisfy W1 = 1.5N*W until the obtained final honeycomb-like liquid cooling plate flow channel model meets the condition for stopping iteration.

[0081] The honeycomb-like liquid cooling plate flow channel model of the present invention can be applied to the heat source device in the aircraft liquid cooling system. The liquid cooling plate, as the heat source device, is in direct contact with the heat-generating electronic device for heat conduction, and is cooled by the low-temperature fluid coming from the cold source system, thereby achieving the effect of cooling the heat-generating electronic device.

[0082] Example 1

[0083] The honeycomb-like liquid cooling plate flow channel of this embodiment is arranged inside a rectangular liquid cooling plate. As Figure 1 shown, it includes a honeycomb-like flow channel network, a first collecting flow channel, a second collecting flow channel, parallel straight flow channels, a flow channel inlet, and a flow channel outlet;

[0084] The flow channel inlet and the flow channel outlet are symmetrically arranged at the centers of the left and right side edges of the liquid cooling plate respectively. Among them, the flow channel inlet is arranged at the center of the right side edge of the liquid cooling plate and is connected to the first collecting flow channel; the flow channel outlet is arranged at the center of the left side plate of the liquid cooling plate and is connected to the second collecting flow channel;

[0085] The first collecting flow channel and the second collecting flow channel are respectively connected to 6 parallel straight flow channels, and the parallel straight flow channels are connected to the flow channel network forming a honeycomb shape;

[0086] From the overall structure, the liquid cooling plate flow channel is a rhombus-shaped honeycomb. The first collecting flow channel and the second collecting flow channel are respectively parallel and symmetrically arranged on the opposite sides of the rhombus. The first collecting flow channel is connected to the honeycomb-like flow channel network through 6 parallel straight flow channels, and the second collecting flow channel is connected to the honeycomb-like flow channel network through 6 parallel straight flow channels; the flow channel inlet is arranged at the middle position of the first collecting flow channel; the flow channel outlet is arranged at the middle position of the second collecting flow channel, and the axes of the flow channel inlet and the flow channel outlet are parallel and pass through the center of the rhombus.

[0087] The honeycomb-like flow channel network constitutes the main flow channel, which is axially symmetric as a whole and is composed of 61 regular hexagon-shaped micro flow channel units arranged. Adjacent micro flow channel units share a common flow channel tube, and each unit is interconnected through the common flow channel, forming a honeycomb-like shape as a whole.

[0088] Particularly, the lengths of the 6 parallel straight flow channels connecting the first collecting flow channel and the honeycomb-like flow channel network are equal to the side length of the regular hexagon of the honeycomb-like flow channel network. The lengths of the 6 parallel straight flow channels connecting the second collecting flow channel and the honeycomb-like flow channel network are also equal to the side length of the regular hexagon of the honeycomb-like flow channel network. And if the number n of regular hexagons on a single side of the rhombus-shaped honeycomb-like liquid cooling plate flow channel is 5, then the number N of the parallel straight flow channels connecting the first collecting flow channel or the second collecting flow channel and the honeycomb-like flow channel network is n + 1, that is, N is 6.

[0089] The honeycomb-like flow channel network is axially symmetric as a whole and is composed of 61 regular hexagon-shaped micro flow channel units arranged. Adjacent micro flow channel units share a common flow channel tube, and each unit is interconnected through the common flow channel, forming a honeycomb-like shape as a whole.

[0090] The first collecting channel forms a set of adjacent sides of five regular hexagons on one side of the rhombus-shaped honeycomb liquid-cooled plate channel, and the channel width of the first collecting channel is set to be much larger than the channel width of the regular hexagon in the honeycomb channel network; the second collecting channel forms a set of adjacent sides of five regular hexagons on one side of the rhombus-shaped honeycomb liquid-cooled plate channel, and the channel width of the second collecting channel is set to be much larger than the channel width of the regular hexagon in the honeycomb channel network

[0091] It should be noted that along the direction away from the channel inlet, the number of regular hexagons in the next vertical layer of regular hexagon-shaped micro-channel units connected to six parallel straight channels is 6, and the number of regular hexagons in the next vertical layer of regular hexagon-shaped micro-channel units is 7. The number of regular hexagons in each vertical layer of hexagonal micro-channel units increases by one level by level until the distance between a certain vertical layer of regular hexagon-shaped micro-channel units and the upper and lower sides of the liquid-cooled plate ≤ 4 mm, then the increase in the number of regular hexagons in the vertical regular hexagon-shaped micro-channel units stops, and then the number of regular hexagons in the next vertical layer of regular hexagon-shaped micro-channel units decreases level by level until the number of regular hexagons in the last vertical layer of regular hexagon-shaped micro-channel units is 6, ensuring that the overall honeycomb channel network is axisymmetric and covers the entire liquid-cooled plate;

[0092] For the channels in the parallel straight channels and the regular hexagon-shaped micro-channel units in the honeycomb channel network, the channel width is W = 1 mm, the channel height is H = 1 mm, and the channel spacing is K = 3 mm, satisfying 1.5 * W ≤ K ≤ 3 * W.

[0093] The equivalent diameters of the channel inlet and the channel outlet are the same, D = 6 mm, satisfying D ≥ N * W.

[0094] The first collecting channel and the second collecting channel are rectangular, with a width of W1 = 9 mm, and W1 satisfies W1 = 1.5N * W.

[0095] The pressure nephogram of the honeycomb-like liquid-cooled plate channel in this embodiment is as Figure 2 shown. It can be seen from the figure that the flow resistance obtained by the simulation calculation of the honeycomb-like liquid-cooled plate channel in this embodiment is 844.92 Pa.

[0096] The temperature nephogram of the honeycomb-like liquid-cooled plate channel in this embodiment is as Figure 3 shown. It can be seen from the figure that the highest temperature of the heat source obtained by the simulation calculation of the honeycomb-like liquid-cooled plate channel in this embodiment is 68.41 °C.

[0097] Embodiment 2

[0098] The honeycomb-like liquid-cooled plate channel designed in Embodiment 1 is actually verified by a ground verification system.

[0099] The structure of the ground verification system is as follows Figure 4 As shown, the verification system consists of a liquid storage tank, a flow meter, a gear pump, an analog thermal load, a heat dissipation skin, and sensors. The sensors are set at the inlet and outlet positions of the S-shaped single-strip series skin flow channel;

[0100] The verification conditions are: a heat flux of 50 W / cm 2 for the heat load;

[0101] After actual verification by the ground verification system, the flow resistance of the honeycomb-like liquid cooling plate flow channel is 844.92 Pa, and the highest temperature of the heat source is 68.41 °C, showing a good cooling effect.

[0102] Example 3

[0103] This example is a design method for the honeycomb-like liquid cooling plate flow channel of Example 1, including the following steps:

[0104] S1: Obtain the actually available rectangular liquid cooling plate bottom plate with a bottom plate width of 45 mm;

[0105] S2: Design the preliminary shape and size of the honeycomb-like liquid cooling plate flow channel to obtain the size and shape of the target flow channel;

[0106] S21: Set the flow channel inlet and outlet at the centers of the left and right sides of the liquid cooling plate bottom plate respectively to determine the positions and sizes of the flow channel inlet and outlet;

[0107] Specifically, the flow channel inlet and outlet are symmetrically arranged at the centers of the left and right sides of the liquid cooling plate. Among them, the flow channel inlet is set at the center of the right side of the liquid cooling plate; the flow channel outlet is set at the center of the left side of the liquid cooling plate; the equivalent radius D of the flow channel inlet and outlet is 5 mm;

[0108] S22: Set a square first collecting flow channel and a second collecting flow channel on the liquid cooling plate bottom plate. The first collecting flow channel is connected to the flow channel inlet, and the second collecting flow channel is in communication with the flow channel outlet;

[0109] The width W1 of the first collecting flow channel and the second collecting flow channel is 5 mm;

[0110] S23: Set 6 parallel linear channels on the bottom plate of the liquid cooling plate, which are connected to the first collecting channel. Then, along the direction away from the channel inlet, set a micro-channel unit in the shape of a regular hexagon at the next vertical level connected to the 6 parallel linear channels. The number of regular hexagons in this micro-channel unit is 6. Set the vertical-level regular-hexagon-shaped micro-channel units successively and step by step. The number of regular hexagons in the regular-hexagon-shaped micro-channel unit at each vertical level increases by one step by step until the distance between the regular-hexagon-shaped micro-channel unit at a certain vertical level and the upper and lower sides of the liquid cooling plate is equal to 4 mm. Then, stop increasing the number of regular hexagons in the regular-hexagon-shaped micro-channel unit at the vertical level. Then, successively and step by step, decrease the number of regular hexagons in the regular-hexagon-shaped micro-channel unit at the next vertical level until the number of regular hexagons in the regular-hexagon-shaped micro-channel unit at the last vertical level is 6, forming a honeycomb-shaped channel network.

[0111] S24: Set 6 parallel linear channels on the bottom plate of the liquid cooling plate to connect to the second collecting channel and the honeycomb-shaped channel network, obtaining the size and shape of the target channel.

[0112] S3: According to the size and shape of the target channel, use the sketch tool of the modeling software to draw the basic shape and size of the channel on the plane.

[0113] S4: Use the feature tool of the modeling software to convert the sketch into a three-dimensional solid, obtaining the first honeycomb-shaped liquid cooling plate channel model.

[0114] S5: Use the modeling software to extract the inner cavity model of the first honeycomb-shaped liquid cooling plate channel model, import it into the simulation software for mesh generation, boundary condition setting, working medium physical property parameter and solution parameter setting, and perform the solution to obtain the channel flow resistance, channel flow rate, and average temperature.

[0115] Among them, the mesh scale is D / 100, which can balance the simulation efficiency and accuracy.

[0116] The boundary conditions are as follows: Set the velocity and temperature boundary conditions at the channel inlet position. The velocity value is 3.5 L / min, and the temperature value is 10 °C. Set the pressure boundary condition at the channel outlet position, and the pressure value is 0.1 MPa. Set the heat boundary condition on one surface of the liquid cooling plate, and the heat flux is 50 W / m 2 .

[0117] Set the working medium physical property parameters: The medium is 65% ethylene glycol solution, with a density of 1069.145 kg / m 3 , a specific heat capacity of 3.165 kJ / kg*K, and a viscosity of 1.91 mPa*s.

[0118] The solution parameters are the number of calculation steps and the convergence residual. The number of calculation steps is 500 steps, and the convergence residual is 1E-6.

[0119] S6: Analyze the flow resistance, flow rate, and average temperature of the flow channels obtained in step S5. According to the analysis results, optimize the structure of the first honeycomb-like liquid-cooled plate flow channel model, adjust the equivalent radius D = 6 mm of the flow channel outlet and inlet, and widen the widths W1 = 9 mm of the first and second collecting flow channels to obtain the second honeycomb-like liquid-cooled plate flow channel model;

[0120] Simulate and analyze the flow resistance of the second honeycomb-like liquid-cooled plate flow channel model. Among them, the flow resistance of the second honeycomb-like liquid-cooled plate flow channel model is P 2 = 844.92 Pa, and that of the first honeycomb-like liquid-cooled plate flow channel model is P 1 = 844.93 Pa. When abs(P N - P N-1 ) / P N-1 ≤ 0.01, stop the iteration. The second honeycomb-like liquid-cooled plate flow channel model is the final honeycomb-like liquid-cooled plate flow channel model.

[0121] Comparative Example 1

[0122] The honeycomb-like liquid-cooled plate flow channel in this comparative example has the same shape as that in Example 1, but the difference lies in some dimensions of the honeycomb-like liquid-cooled plate flow channel. The differences are as follows:

[0123] For the flow channels in the parallel straight flow channels and the hexagonal micro-flow channel units in the honeycomb-like flow channel network, the flow channel width is W = 1 mm, the flow channel height is H = 1 mm, and the flow channel spacing is K = 1 mm, which does not satisfy 1.5 * W ≤ K ≤ 3 * W.

[0124] The equivalent diameters of the flow channel inlet and outlet are the same, D = 5 mm, which does not satisfy D ≥ N * W.

[0125] The width W1 of the first and second collecting flow channels is 6 mm, which does not satisfy W1 = 1.5N * W.

[0126] Apply the honeycomb-like liquid-cooled plate flow channels of Example 1 and Comparative Example 1 to the heat source equipment in the aircraft liquid cooling system. After actual verification by the ground verification system, the flow resistance of the honeycomb-like liquid-cooled plate flow channel in Example 1 is 844.92 Pa, and the highest temperature of the heat source is 68.41 °C; the flow resistance of the S-shaped broken line single-strip series liquid-cooled plate flow channel in Comparative Example 1 is 1238.76 Pa, and the highest temperature of the heat source is 96.23 °C. The application of the honeycomb-like liquid-cooled plate flow channel in Example 1 to the heat source equipment in the aircraft liquid cooling system is superior to that in Comparative Example 1.

[0127] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A honeycomb - like liquid - cooling plate flow channel is arranged in a rectangular liquid - cooling plate. It is characterized in that it includes a honeycomb - like flow channel network, a first collecting flow channel, a second collecting flow channel, parallel straight flow channels, a flow channel inlet and a flow channel outlet; The flow channel inlet and the flow channel outlet are symmetrically arranged at the centers of the left and right sides of the liquid - cooling plate respectively. The flow channel inlet is arranged at the center of the right side of the liquid - cooling plate and is connected to the first collecting flow channel; the flow channel outlet is arranged at the center of the left side of the liquid - cooling plate and is connected to the second collecting flow channel; The first collecting flow channel and the second collecting flow channel are square. The first collecting flow channel and the second collecting flow channel are respectively connected to N parallel straight flow channels, and the parallel straight flow channels are connected to the honeycomb - like flow channel network.

2. The honeycomb - like liquid - cooling plate flow channel according to claim 1, It is characterized in that the honeycomb - like flow channel network is axisymmetric.

3. The honeycomb - like liquid - cooling plate flow channel according to claim 2, It is characterized in that the honeycomb - like flow channel network is composed of several regular - hexagon - shaped micro - flow channel units arranged. Adjacent micro - flow channel units share a common flow channel tube, and each unit is interconnected through the common flow channel, forming a shape similar to a honeycomb as a whole.

4. The honeycomb - like liquid - cooling plate flow channel according to claim 3, It is characterized in that the flow channel spacing between the parallel straight flow channels and the regular - hexagon micro - flow channels in the honeycomb - like flow channel network satisfies: 1.5*W ≤ K ≤ 3*W; where W is the flow channel width, in mm; K is the flow channel spacing, in mm.

5. The honeycomb - like liquid - cooling plate flow channel according to claim 4, It is characterized in that the equivalent diameters of the flow channel inlet and the flow channel outlet are equal.

6. The honeycomb - like liquid - cooling plate flow channel according to claim 5, It is characterized in that the equivalent diameters of the flow channel inlet and the flow channel outlet satisfy: D ≥ N*W; where D is the equivalent diameter of the flow channel inlet and the flow channel outlet, in mm; W is the flow channel width, in mm; N is the number of parallel straight flow channels connected to the first collecting flow channel, in pieces.

7. The honeycomb - like liquid - cooling plate flow channel according to claim 6, It is characterized in that the widths of the first collecting flow channel and the second collecting flow channel are equal and satisfy: W1 ≥ D; where D is the equivalent diameter of the flow channel inlet and the flow channel outlet, in mm; W1 is the width of the first collecting flow channel and the second collecting flow channel, in mm.

8. A design method for a honeycomb - like liquid - cooling plate flow channel, It is characterized in that it is used to design the honeycomb - like liquid - cooling plate flow channel according to any one of claims 1 - 7, and includes the following steps: S1: Obtain the actual available bottom plate of the rectangular liquid - cooling plate; S2: Design the preliminary shape and size of the honeycomb - like liquid - cooling plate flow channel to obtain the size and shape of the target flow channel; S3: According to the size and shape of the target flow channel, use the sketch tool of the modeling software to draw the basic shape and size of the flow channel on a plane; S4: Use the feature tool of the modeling software to convert the sketch into a three - dimensional entity to obtain the first honeycomb - like liquid - cooling plate flow channel model; S5: Extract the inner cavity model of the first honeycomb-like liquid cooling plate flow channel model using modeling software, import it into the simulation software for mesh generation, boundary condition setting, working fluid property parameter and solution parameter setting, and perform the solution to obtain the flow channel flow resistance, flow channel flow rate, and average temperature; S6: Analyze the flow channel flow resistance, flow channel flow rate, and average temperature obtained in step S5. According to the analysis results, optimize the structure of the first honeycomb-like liquid cooling plate flow channel model to obtain the second honeycomb-like liquid cooling plate flow channel model; Perform a simulation analysis on the flow resistance, flow channel flow rate, and average temperature of the second honeycomb-like liquid cooling plate flow channel model. According to the simulation analysis results of the second honeycomb-like liquid cooling plate flow channel model and the first honeycomb-like liquid cooling plate flow channel model, determine whether the simulation analysis results meet the stop iteration condition. If they meet, determine the second honeycomb-like liquid cooling plate flow channel model as the final liquid cooling plate flow channel model. If they do not meet, optimize the structure of the second honeycomb-like liquid cooling plate flow channel model, repeat the simulation analysis until the Nth honeycomb-like liquid cooling plate flow channel model obtained after N iterations meets the stop iteration condition, which is the final honeycomb-like liquid cooling plate flow channel model.

9. According to the design method described in claim 8, wherein, in step S5, the scale of the mesh is 0.01 times the diameter of the flow channel inlet.

10. According to the design method described in claim 9, wherein, In step S6, the condition for stopping iteration is that the flow resistance of the (N - 1)-th honeycomb-like liquid cooling plate flow channel model is P N-1 , and the flow resistance of the N-th honeycomb-like liquid cooling plate flow channel model is P N . When abs(P N - P N-1 ) / P N-1 ≤ 0.01, stop iteration to obtain the final honeycomb-like liquid cooling plate flow channel model.

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