Flow boiling experiment device

Abstract

The utility model discloses a flow boiling experiment device. The flow boiling experiment device comprises a base and an upper cover. A groove, an inlet and an outlet are formed in the base, a plurality of protrusions are arranged on the bottom wall of the groove at intervals in the width direction of the groove and extend in the length direction of the groove, a flowing groove is defined between every two adjacent protrusions, and gasification grooves extending in the length direction of the flowing groove are formed in the bottom wall of each flowing groove. One end of each flowing groove is communicated with the inlet, and the other end of each flowing groove is communicated with the outlet; the upper cover is a transparent piece, covers the base and is used for sealing the opening of the groove. According to the flow boiling experiment device provided by the utility model, the critical heat flux density can be effectively improved, and the heat exchange effect of the cooling working medium is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of phase change heat transfer, in particular to a flow boiling experimental device. Background Art

[0002] Among related technologies, two-phase flow boiling heat transfer technology has broad application prospects in areas such as cooling high-heat-flux electronic devices and battery thermal management. During the flow boiling process of the coolant, bubble growth is easily restricted by the channel size, resulting in a shorter duration of the coolant's plug flow state and a subsequent decrease in the critical heat flux density, which seriously affects the coolant's heat transfer performance. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a flow boiling experimental device that can effectively increase the critical heat flux density and enhance the heat exchange effect of the cooling medium.

[0004] According to an embodiment of the present invention, a flow boiling experimental device comprises a base and an upper cover. The base has a groove, an inlet, and an outlet. The bottom wall of the groove is provided with a plurality of protrusions spaced along the width of the groove. The protrusions extend along the length of the groove, with a flow channel defined between two adjacent protrusions. The bottom wall of the flow channel is provided with a vaporization groove extending along the length of the flow channel, the width of the vaporization groove being smaller than the width of the flow channel. One end of the plurality of flow channels is connected to the inlet, and the other end is connected to the outlet. The upper cover is a transparent member, which is mounted on the base and used to seal the opening of the groove.

[0005] According to the flow boiling experimental device of the embodiment of the present invention, a plurality of protrusions are arranged on the bottom wall of the groove on the base at intervals along the width direction of the groove, and the protrusions extend along the length direction of the groove, and a flow groove is defined between two adjacent protrusions. At the same time, by providing a vaporization groove extending along the length direction of the flow groove on the bottom wall of the flow groove, and making the width of the vaporization groove smaller than the width of the flow groove, the speed of bubble aggregation in the vaporization groove can be accelerated, so that the cooling medium can form a plug flow state more quickly, thereby improving the heat exchange effect of the cooling medium. At the same time, the flow groove can provide bubbles with a larger growth space, and can reduce the spatial restriction of the flow groove side wall on the bubbles in the cooling medium, so that the cooling medium can form larger bubbles, thereby prolonging the duration of the cooling medium in the plug flow state, thereby effectively improving the critical heat flux density and further improving the heat exchange effect of the cooling medium.

[0006] According to some embodiments of the present invention, the flow groove and the gasification groove are T-shaped in cross-section perpendicular to the length direction of the groove, and the gasification groove is located below the flow groove.

[0007] According to some embodiments of the present invention, the two ends of the protrusion in the length direction are respectively spaced apart from the two side walls opposite to the length direction of the groove, and the groove has a first confluence area and a second confluence area located on both sides of the length direction of the protrusion, and the inlet and the outlet are respectively arranged on the bottom wall of the first confluence area and the bottom wall of the second confluence area.

[0008] According to some embodiments of the present invention, two ends of the plurality of protrusions along the length direction of the groove are flush with each other, and the length of the gasification groove is the same as the length of the flow groove.

[0009] According to some embodiments of the present invention, along the width direction of the groove, the flow groove located in the middle area of ​​the multiple flow grooves is the first flow groove, and the flow grooves located on both sides are the second flow grooves, and the width of the first flow groove is smaller than the width of the second flow groove.

[0010] In some embodiments of the present invention, the width of the first flow groove is d, and satisfies 2.5mm≤d≤3.5mm; and / or the width of the second flow groove is e, and satisfies 3.5mm<e≤4.5mm.

[0011] According to some embodiments of the present invention, along the width direction of the groove, the gasification groove located in the middle area among the multiple gasification grooves is the first gasification groove, and the gasification grooves located on both sides are the second gasification grooves, and the width of the first gasification groove is smaller than the width of the second gasification groove.

[0012] In some embodiments of the present invention, the width of the first gasification groove is 0.5 mm-0.9 mm; and / or the width of the second gasification groove is 1 mm-1.2 mm.

[0013] According to some embodiments of the present invention, the height of the protrusion is 0.5 mm-0.9 mm; and / or the depth of the gasification groove is 0.5 mm-0.9 mm.

[0014] According to some embodiments of the present invention, there is a blind hole on the side wall of the base, and the blind holes are multiple and spaced apart along the length direction of the groove. The blind holes are located below the vaporization tank. The flow boiling experimental device also includes a thermocouple, and the thermocouple is inserted into the blind hole. The thermocouples correspond one-to-one to the multiple blind holes.

[0015] According to some embodiments of the present invention, the upper cover and the base are connected by fasteners; and / or the upper cover is an acrylic plate; and / or the base is an aluminum alloy part.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is an exploded view of a flow boiling experimental device according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Enlarged view of point C in the middle;

[0020] Figure 3 is a top view of the base of the flow boiling experimental device according to an embodiment of the present utility model;

[0021] Figure 4 It is along Figure 3 Cross-sectional view along line AA;

[0022] Figure 5 It is along Figure 3 Cross-sectional view along line BB.

[0023] Reference numerals:

[0024] 100. Flow boiling experimental apparatus;

[0025] 1. Base; 11. Groove; 111. First confluence area; 112. Second confluence area; 12. Inlet; 13. Outlet; 14. Protrusion; 15. Flow groove; 151. First flow groove; 152. Second flow groove; 16. Vaporization groove; 161. First vaporization groove; 162. Second vaporization groove; 17. Blind hole; 18. Second mounting hole; 19. Sealing groove;

[0026] 2. Upper cover; 21. First mounting hole. DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] Reference below Figure 1-Figure 5 A flow boiling experimental device 100 according to an embodiment of the present invention is described.

[0031] like Figure 1 As shown, the flow boiling experimental device 100 according to an embodiment of the present invention includes a base 1 and an upper cover 2 .

[0032] Specifically, such as Figure 1-Figure 5 As shown, the base 1 has a groove 11, an inlet 12, and an outlet 13. The bottom wall of the groove 11 is provided with a plurality of protrusions 14, which are spaced apart along the width of the groove 11 and extend along the length of the groove 11. A flow channel 15 is defined between two adjacent protrusions 14. The bottom wall of the flow channel 15 is provided with a vaporization groove 16 extending along the length of the flow channel 15. The width of the vaporization groove 16 is smaller than that of the flow channel 15. One end of each of the multiple flow channels 15 is connected to the inlet 12, and the other end is connected to the outlet 13. The upper cover 2 is a transparent member and is placed on the base 1 to cover the opening of the groove 11.

[0033] It is understood that the upper cover 2 is provided on the base 1 and covers the open opening of the groove 11, so that a circulation channel for the cooling medium can be formed between the base 1 and the upper cover 2. Among them, the inlet 12 and the outlet 13 can be provided on the bottom wall of the groove 11 and penetrate the base 1 in the thickness direction of the base 1. In the length direction of the groove 11, the inlet 12 and the outlet 13 can be located on both sides of the protrusion 14 and the flow groove 15 respectively, so that the cooling medium can enter the groove 11 from the inlet 12, and then flow into the flow groove 15 and the vaporization groove 16 on the bottom wall of the flow groove 15 from the end of the flow groove 15 close to the inlet 12. Then, the cooling medium flowing out of the flow groove 15 and the vaporization groove 16 can flow out of the groove 11 through the outlet 13.

[0034] Furthermore, in the thickness direction of the base 1, the side of the base 1 facing away from the groove 11 is suitable for connection to a heat source, and the heat source is opposite to the protrusion 14, the flow groove 15, and the vaporization groove 16, so that the cooling medium can achieve flow boiling heat exchange in the flow groove 15 and the vaporization groove 16. The heat source can specifically be a battery, a high-heat electronic device, or a simulated heat source. When a single-phase liquid cooling medium flows from the inlet 12 into the multiple flow grooves 15 and the multiple vaporization grooves 16, heat exchange occurs between the cooling medium and the heat source. The cooling medium absorbs heat from the heat source and forms multiple vaporization cores on the bottom and side walls of the vaporization groove 16 and the flow groove 15. At the vaporization cores, part of the liquid cooling medium absorbs heat and is converted into steam, thereby forming tiny bubbles. The single-phase liquid cooling medium becomes a multiphase flow cooling medium, and then the size and number of the bubbles continue to increase.

[0035] As the bubbles grow, gravity forces them to detach from the bottom and side walls of vaporization groove 16 and flow groove 15 and move upward. As the coolant flows and absorbs heat, the bubbles coalesce, causing the coolant within vaporization groove 16 and flow groove 15 to form a plug flow. This increases the bubble surface area and the latent heat transfer at the gas-liquid interface, helping to increase the coolant's heat transfer coefficient and enhance the heat transfer effect. Finally, the multiphase coolant flowing from the multiple flow grooves 15 exits groove 11 through outlet 13.

[0036] Among them, the vaporization groove 16 is arranged on the bottom wall of the flow groove 15 and the width of the vaporization groove 16 is smaller than the width of the flow groove 15. The space of the vaporization groove 16 is smaller, so that the bubbles that grow in isolation on the bottom wall and side wall of the vaporization groove 16 can be generated more quickly and gathered to form large bubbles, and then the large bubbles move upward to the flow groove 15, so that the cooling medium in the vaporization groove 16 and the flow groove 15 can form a plug flow state more quickly, thereby improving the heat exchange effect of the cooling medium.

[0037] At the same time, the space of the flow groove 15 is larger than that of the vaporization groove 16. After the bubbles in the vaporization groove 16 move upward to the flow groove 15, the flow groove 15 can provide the bubbles with a larger growth space. After the cooling medium forms a plug flow state, the space restriction of the side wall of the flow groove 15 on the bubbles in the cooling medium can be reduced, so that the cooling medium can form larger bubbles, thereby extending the duration of the cooling medium in the plug flow state, and then effectively increasing the critical heat flux density, further improving the heat exchange effect of the cooling medium.

[0038] It should be noted that the upper cover 2 is transparent, allowing the flow boiling experimental apparatus 100 to intuitively display various phenomena of the cooling medium during the flow boiling process, such as bubble generation, movement, merging, and rupture, facilitating visualization experiments and helping the experimenter more clearly observe the physical process and mechanism of the cooling medium's flow boiling. By changing experimental conditions (such as the cooling medium flow rate, heat source temperature, etc.), the effects of different parameters on the flow boiling process can be observed and analyzed, thereby providing guidance for understanding, technical optimization, and innovation in flow boiling heat transfer.

[0039] According to the flow boiling experimental device 100 of the embodiment of the present invention, a plurality of protrusions 14 are provided on the bottom wall of the groove 11 on the base 1, spaced apart along the width direction of the groove 11. The protrusions 14 extend along the length direction of the groove 11, and a flow groove 15 is defined between two adjacent protrusions 14. At the same time, a vaporization groove 16 is provided on the bottom wall of the flow groove 15, extending along the length direction of the flow groove 15, and the width of the vaporization groove 16 is smaller than the width of the flow groove 15. This can accelerate the coalescence speed of bubbles in the vaporization groove 16, allowing the cooling medium to form a plug flow state more quickly, thereby improving the heat exchange effect of the cooling medium. At the same time, the flow groove 15 can provide bubbles with a larger growth space, which can reduce the spatial restriction of the bubbles in the cooling medium by the side wall of the flow groove 15, allowing the cooling medium to form larger bubbles, thereby extending the duration of the cooling medium in the plug flow state, and thus effectively increasing the critical heat flux density, further improving the heat exchange effect of the cooling medium.

[0040] In some embodiments of the present invention, Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown, the flow groove 15 and the vaporization groove 16 are T-shaped in cross-section perpendicular to the length direction of the groove 11, and the vaporization groove 16 is located below the flow groove 15. It can be understood that part of the bottom wall of the flow groove 15 is sunken to form the vaporization groove 16, and the width of the vaporization groove 16 is smaller than the width of the flow groove 15. In the width direction of the base 1, the vaporization groove 16 is located in the middle position of the bottom wall of the flow groove 15, so that the bubbles growing isolated on the bottom wall and side wall of the vaporization groove 16 with a smaller space below can be generated more quickly and gathered to form large bubbles, and then the large bubbles move upward to the flow groove 15, so that the cooling medium in the vaporization groove 16 and the flow groove 15 can form a plug flow state more quickly, thereby improving the heat exchange effect of the cooling medium.

[0041] The flow groove 15 with a larger space at the top can provide bubbles with a larger growth space, which can reduce the spatial restriction of the side wall of the flow groove 15 on the bubbles in the cooling medium, so that the cooling medium can form larger bubbles, thereby extending the duration of the cooling medium in the plug flow state, and then effectively increasing the critical heat flux density, further improving the heat exchange effect of the cooling medium.

[0042] It should be noted that, Figure 4 and Figure 5 As shown, the up-down direction is consistent with the thickness direction of the base 1 mentioned above, and the up-down direction is perpendicular to the width direction of the base 1 .

[0043] In some embodiments of the present invention, Figure 1 、 Figure 2 and Figure 3 As shown, the two ends of the protrusion 14 in the longitudinal direction are spaced apart from the two side walls of the groove 11 in the longitudinal direction. The groove 11 has a first confluence area 111 and a second confluence area 112 located on both sides of the protrusion 14 in the longitudinal direction. The inlet 12 and the outlet 13 are respectively located on the bottom wall of the first confluence area 111 and the bottom wall of the second confluence area 112. The first confluence area 111 and the second confluence area 112 respectively serve to divide and converge the flow. The inlet 12 located on the bottom wall of the first confluence area 111 is located on one side of the protrusion 14 in the longitudinal direction and is spaced apart from the side wall of the groove 11 in the longitudinal direction. The outlet 13 located on the bottom wall of the second confluence area 112 is located on the other side of the protrusion 14 in the longitudinal direction and is spaced apart from the side wall of the groove 11 in the longitudinal direction.

[0044] Thus, the cooling medium entering the groove 11 from the inlet 12 can first enter the first confluence region 111 and then flow into different flow grooves 15, which can effectively improve the uniformity of the cooling medium flow rate within the multiple flow grooves 15, thereby improving the heat exchange uniformity of the flow boiling experimental device 100 along the width direction of the groove 11. At the same time, the cooling medium flowing out of the multiple flow grooves 15 is also first gathered in the second confluence region 112 and then flows out from the outlet 13, which can ensure the flowability of each flow groove 15 and thus ensure the flow boiling heat exchange effect of the cooling medium in each flow groove 15.

[0045] In some embodiments of the present invention, Figure 1 、 Figure 2 and Figure 3 As shown, the multiple protrusions 14 are flush at both ends along the length of the groove 11, and the length of the vaporization groove 16 is the same as the length of the flow groove 15. This ensures that each flow groove 15 and vaporization groove 16 are of the same length, thereby ensuring consistency and uniformity in the flow boiling process of the cooling medium within the multiple flow grooves 15 and vaporization grooves 16 across the width of the groove 11, thereby improving the heat exchange uniformity and heat exchange effect of the flow boiling experimental device 100 across the width. In addition, the fact that the multiple protrusions 14 and vaporization grooves 16 are of the same length and flush at both ends along the length also facilitates processing, improves production efficiency, and reduces production costs.

[0046] In some embodiments of the present invention, Figure 3 、 Figure 4 and Figure 5 As shown, along the width direction of the groove 11, the flow groove 15 located in the middle area of ​​the multiple flow grooves 15 is a first flow groove 151, and the flow grooves 15 located on both sides are second flow grooves 152. The width of the first flow groove 151 is smaller than the width of the second flow groove 152. Because the inlet 12 and the outlet 13 are located in the middle area in the width direction of the groove 11, the inlet 12 and the outlet 13 are located closer to the first flow groove 151.

[0047] If the width of the first flow groove and the second flow groove is the same, it is easy to cause the flow rate of the cooling medium in the first flow groove to be greater than the flow rate of the cooling medium in the second flow groove. The fluid flow rate and flow velocity in the second flow grooves on both sides are relatively small, so that after the cooling medium in the second flow groove forms a plug flow state, the large bubbles in the second flow groove cannot be discharged in time, thereby causing the second flow groove to be blocked and even causing the bubbles in the second flow groove to flow back.

[0048] Therefore, making the width of the first flow groove 151 smaller than the width of the second flow groove 152 is conducive to more cooling medium flowing to the second flow grooves 152 located on both sides, thereby effectively improving the fluid flow rate and flow rate in the second flow groove 152, and can improve the uniformity of the fluid flow flowing into the first flow groove 151 and the second flow groove 152, thereby avoiding blockage or even bubble reflux in the first flow groove 151 and the second flow groove 152 at the same time.

[0049] In such Figure 4 In the specific embodiment shown, along the width direction of the groove 11, there are three first flow grooves 151 located in the middle area, and three second flow grooves 152 located on both sides. Of course, the number of the above-mentioned first flow grooves 151 and second flow grooves 152 is exemplary, and this application does not make any specific restrictions on this.

[0050] In some embodiments of the present invention, Figure 4 As shown, the width of the first flow groove 151 is d, and satisfies 2.5mm≤d≤3.5mm. If d<2.5mm, the first flow groove 151 is too narrow, and the flow rate of the cooling medium in the first flow groove 151 is too small. If d>3.5mm, the first flow groove 151 is too wide, so that the number of first flow grooves 151 that can be arranged in the width direction of the groove 11 is reduced, and the contact area between the cooling medium and the base 1 that can form a vaporization core is reduced, which is not conducive to the flow boiling heat exchange effect.

[0051] Therefore, d is within the range of 2.5mm-3.5mm, which can not only ensure the flow rate of the cooling medium in the first flow groove 151, avoid blockage or even bubble reflux in the first flow groove 151, but also ensure the size of the contact area between the cooling medium and the base 1 to form a vaporization core, thereby improving the flow boiling heat exchange effect.

[0052] In some embodiments of the present invention, Figure 4 As shown, the width of the second flow groove 152 is e, and satisfies 3.5mm<e≤4.5mm. If e≤3.5mm, the second flow groove 152 is too narrow, and the flow rate of the cooling medium in the second flow groove 152 is too small. If e>4.5mm, the second flow groove 152 is too wide, so that the number of second flow grooves 152 that can be arranged in the width direction of the groove 11 is reduced, and the contact area between the cooling medium and the base 1 that can form a vaporization core is reduced, which is not conducive to the flow boiling heat exchange effect.

[0053] Therefore, 3.5mm<e≤4.5mm can ensure the flow rate of the cooling medium in the second flow groove 152, avoid blockage or even bubble backflow in the second flow groove 152, and ensure the size of the contact area between the cooling medium and the base 1 to form a vaporization core, thereby improving the flow boiling heat exchange effect.

[0054] In some embodiments of the present invention, Figure 3 、 Figure 4 and Figure 5 As shown, along the width direction of the groove 11, the gasification groove 16 located in the middle region of the plurality of gasification grooves 16 is a first gasification groove 161, and the gasification grooves 16 located on both sides are second gasification grooves 162. The width of the first gasification groove 161 is smaller than the width of the second gasification groove 162. Because the inlet 12 and the outlet 13 are located in the middle region along the width direction of the groove 11, the inlet 12 and the outlet 13 are located closer to the first gasification groove 161.

[0055] If the width of the first vaporization tank and the second vaporization tank are the same, it is easy to cause the flow rate of the cooling medium in the first vaporization tank to be greater than the flow rate of the cooling medium in the second vaporization tank. The fluid flow rate and flow velocity in the second vaporization tanks on both sides are relatively small, so that after the cooling medium in the second vaporization tank forms a plug flow state, the large bubbles in the second vaporization tank cannot be discharged in time, thereby causing the second vaporization tank to be blocked and even causing the bubbles in the second vaporization tank to flow back.

[0056] Therefore, the width of the first vaporization groove 161 is smaller than the width of the second vaporization groove 162, which is conducive to more cooling medium flowing to the second vaporization grooves 162 located on both sides, thereby effectively improving the fluid flow rate and flow rate in the second vaporization groove 162, and can improve the uniformity of the fluid flow rate flowing into the first vaporization groove 161 and the second vaporization groove 162, thereby avoiding blockage or even bubble backflow in the first vaporization groove 161 and the second vaporization groove 162 at the same time.

[0057] In such Figure 4 In the specific embodiment shown, along the width direction of the groove 11, there are three first gasification grooves 161 located in the middle area, and three second gasification grooves 162 located on both sides. Of course, the number of the above-mentioned first gasification grooves 161 and second gasification grooves 162 is exemplary, and this application does not make any specific limitations on this.

[0058] In some embodiments of the present invention, Figure 4As shown, the width of the first vaporization groove 161 is f, and f is in the range of 0.5mm-0.9mm. If f is less than 0.5mm, the first vaporization groove 161 is too narrow, the flow rate of the cooling medium in the first vaporization groove 161 is too small, and the contact area between the cooling medium and the base 1 that can form a vaporization core is reduced, which is not conducive to the flow boiling heat exchange effect. If f is greater than 0.9mm, the first vaporization groove 161 is too wide, which weakens the effect of the first vaporization groove 161 in accelerating the coalescence of bubbles, and the cooling medium in the vaporization groove 16 and the flow groove 15 cannot quickly form a plug flow state, thereby affecting the heat exchange effect of the cooling medium.

[0059] Thus, by keeping f within the range of 0.5 mm to 0.9 mm, the flow rate of the cooling medium in the first vaporization groove 161 is guaranteed, preventing blockage or even bubble backflow in the first vaporization groove 161. Furthermore, the contact area between the cooling medium and the base 1 is large enough to form a vaporization core, thereby improving the flow boiling heat exchange effect. Furthermore, the first vaporization groove 161 is ensured to accelerate the coalescence of bubbles, allowing the cooling medium in the vaporization groove 16 and the flow groove 15 to form a plug flow state more quickly, thereby improving the heat exchange effect of the cooling medium.

[0060] In some embodiments of the present invention, Figure 4 As shown, the width of the second vaporization groove 162 is g, and g is in the range of 1mm-1.2mm. If g is less than 1mm, the second vaporization groove 162 is too narrow, the flow rate of the cooling medium in the second vaporization groove 162 is too small, and the contact area between the cooling medium and the base 1 that can form a vaporization core is reduced, which is not conducive to the flow boiling heat exchange effect. If g is greater than 1.2mm, the second vaporization groove 162 is too wide, so that the effect of the second vaporization groove 162 to accelerate the coalescence of bubbles is weakened, and the cooling medium in the vaporization groove 16 and the flow groove 15 cannot quickly form a plug flow state, thereby affecting the heat exchange effect of the cooling medium.

[0061] Thus, by keeping g within the range of 1 mm to 1.2 mm, the flow rate of the cooling medium in the second vaporization groove 162 is guaranteed, preventing blockage or even bubble backflow in the second vaporization groove 162. Furthermore, the contact area between the cooling medium and the base 1 is large enough to form a vaporization core, thereby improving the flow boiling heat exchange effect. Furthermore, the second vaporization groove 162 is ensured to accelerate the coalescence of bubbles, allowing the cooling medium in the vaporization groove 16 and the flow groove 15 to form a plug flow state more quickly, thereby improving the heat exchange effect of the cooling medium.

[0062] In some embodiments of the present invention, Figure 4As shown, the height of the protrusion 14 is h, which is within the range of 0.8 mm to 1.2 mm. If h is less than 0.8 mm, the depth of the flow groove 15 is too small, the flow rate of the cooling medium in the flow groove 15 is too small, and the space for the bubbles of the cooling medium in the plug flow state is restricted. If h is greater than 1.2 mm, the depth of the flow groove 15 is too large, which increases the thickness of the flow boiling experimental device 100 and thus increases the occupied volume of the flow boiling experimental device 100.

[0063] Therefore, h is made within the range of 0.8mm-1.2mm, which can not only ensure the flow rate of the cooling medium in the flow groove 15 and avoid blockage or even bubble backflow in the flow groove 15, but also provide bubbles with a larger growth space, and reduce the spatial restriction of the flow groove 15 on bubbles in the plug flow state of the cooling medium, thereby extending the duration of the cooling medium in the plug flow state, and then effectively increasing the critical heat flux density and the heat exchange effect of the cooling medium, while ensuring that the occupied volume of the flow boiling experimental device 100 is within an appropriate range.

[0064] In some embodiments of the present invention, Figure 4 As shown, the depth of the vaporization groove 16 is i, and i is in the range of 0.8mm-1.2mm. If i is less than 0.8mm, the depth of the vaporization groove 16 is too small, the flow rate of the cooling medium in the vaporization groove 16 is too small, and the contact area between the cooling medium and the base 1 that can form a vaporization core is reduced, which is not conducive to the flow boiling heat exchange effect. If i is greater than 1.2mm, the depth of the vaporization groove 16 is too large, which will increase the thickness of the flow boiling experimental device 100, thereby increasing the occupied volume of the flow boiling experimental device 100. It will also weaken the effect of the vaporization groove 16 in accelerating the coalescence of bubbles, and the cooling medium will not be able to quickly form a plug flow state, thereby affecting the heat exchange effect of the cooling medium.

[0065] Thus, by keeping i within the range of 0.8 mm to 1.2 mm, the flow rate of the cooling medium in the vaporization tank 16 can be guaranteed, preventing blockage or even bubble backflow in the vaporization tank 16, while also ensuring the size of the contact area between the cooling medium and the base 1 to form a vaporization core, thereby improving the flow boiling heat transfer effect. At the same time, the vaporization tank 16 can also accelerate the coalescence of bubbles, allowing the cooling medium to form a plug flow state more quickly, thereby improving the heat transfer effect of the cooling medium. Furthermore, the occupied volume of the flow boiling experimental apparatus 100 can be ensured to be within an appropriate range.

[0066] In some embodiments of the present invention, Figure 1 and Figure 5As shown, the sidewall of the base 1 has blind holes 17, which are spaced apart along the length of the groove 11 and located below the vaporization tank 16. The flow boiling experimental apparatus 100 also includes thermocouples inserted into the blind holes 17, with each thermocouple corresponding to each of the blind holes 17. The blind holes 17 facilitate the placement and installation of the thermocouples. Along the thickness of the flow boiling experimental apparatus 100, the thermocouples can measure the temperature of the flow boiling experimental apparatus 100 near the heat source and the temperature of the flow boiling experimental apparatus 100 near the cooling medium. Different electromotive force signals are generated based on the temperature differences, allowing the relevant heat transfer characteristic parameters of the cooling medium during the flow boiling process to be measured and calculated. This facilitates experimentation and helps analyze the impact of different parameters on the flow boiling process, providing guidance for understanding flow boiling heat transfer, technical optimization, and innovation.

[0067] In some embodiments of the present invention, Figure 1 As shown, the upper cover 2 and the base 1 are connected by fasteners; this ensures the connection stability between the upper cover 2 and the base 1, while facilitating operation and installation, and also enables a detachable connection between the upper cover 2 and the base 1, facilitating subsequent maintenance and overhaul.

[0068] The upper cover 2 is provided with a plurality of first mounting holes 21, which are spaced apart circumferentially and extend through the thickness of the upper cover 2. The base 1 is provided with a plurality of second mounting holes 18, which correspond one-to-one with the first mounting holes 21. The second mounting holes 18 are spaced apart circumferentially and extend through the thickness of the base 1. The operator can insert fasteners such as bolts sequentially through the corresponding first mounting holes 21 and second mounting holes 18 to securely connect the upper cover 2 and the base 1, making the operation simple and convenient.

[0069] In some embodiments of the present invention, Figure 1 As shown, the upper cover 2 is an acrylic plate, which is a transparent material, so that the dynamic boiling experimental device can intuitively display various phenomena of the cooling medium in the flow boiling process, facilitate the realization of visual experiments, and thus provide guidance for the understanding, technical optimization and innovation of flow boiling heat transfer.

[0070] In some embodiments of the present invention, Figure 1 As shown, the base 1 is made of aluminum alloy. Aluminum alloy has good thermal conductivity and can quickly transfer heat from the heat source to the cooling medium, thereby ensuring the heat absorption effect of the cooling medium and facilitating the heat exchange effect of the cooling medium through flow boiling.

[0071] In some embodiments, as Figure 1 and Figure 2 As shown, in the thickness direction of the flow boiling experimental device 100, a sealing groove 19 is also provided on the side of the base 1 where the groove 11 is provided. The sealing groove 19 is specifically a strip-shaped ring and is arranged around the groove 11. A sealing ring is suitable for placing in the sealing groove 19 to ensure the sealing between the upper cover 2 and the base 1 and prevent the cooling medium in the groove 11 from flowing out of the gap between the upper cover 2 and the base 1.

[0072] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flow boiling experimental device, characterized in that: include: A base, wherein the base has a groove, an inlet, and an outlet, a bottom wall of the groove is provided with a protrusion, wherein the protrusions are arranged in a plurality of intervals along the width direction of the groove, the protrusions extend along the length direction of the groove, and a flow groove is defined between two adjacent protrusions, the bottom wall of the flow groove is sunken and provided with a gasification groove extending along the length direction of the flow groove, the width of the gasification groove is smaller than the width of the flow groove, one end of the plurality of flow grooves is connected to the inlet, and the other end is connected to the outlet; and The upper cover is a transparent member, and the upper cover is arranged on the base and is used to cover the open mouth of the groove.

2. The flow boiling experimental device according to claim 1, characterized in that: The cross-sections of the flow groove and the gasification groove perpendicular to the length direction of the groove are T-shaped, and the gasification groove is located below the flow groove.

3. The flow boiling experimental device according to claim 1, characterized in that: The two ends of the protrusion in the length direction are respectively spaced apart from the two side walls opposite to the length direction of the groove, and the groove has a first confluence area and a second confluence area located on both sides of the length direction of the protrusion, and the inlet and the outlet are respectively arranged on the bottom wall of the first confluence area and the bottom wall of the second confluence area.

4. The flow boiling experimental device according to claim 1, characterized in that: Two ends of the plurality of protrusions along the length direction of the groove are flush with each other, and the length of the gasification groove is the same as the length of the flow groove.

5. The flow boiling experimental device according to claim 1, characterized in that: Along the width direction of the groove, the flow groove located in the middle area of ​​the multiple flow grooves is the first flow groove, and the flow grooves located on both sides are the second flow grooves. The width of the first flow groove is smaller than the width of the second flow groove.

6. The flow boiling experimental device according to claim 5, characterized in that: The width of the first flow groove is d, and satisfies 2.5 mm ≤ d ≤ 3.5 mm; And / or, the width of the second flow groove is e, and satisfies 3.5mm<e≤4.5mm.

7. The flow boiling experimental device according to claim 1, characterized in that: Along the width direction of the groove, the gasification groove located in the middle area of ​​the multiple gasification grooves is the first gasification groove, and the gasification grooves located on both sides are the second gasification grooves. The width of the first gasification groove is smaller than the width of the second gasification groove.

8. The flow boiling experimental device according to claim 7, characterized in that: The width of the first gasification groove is 0.5mm-0.9mm; And / or, the width of the second gasification groove is 1 mm-1.2 mm.

9. The flow boiling experimental device according to claim 1, characterized in that: The height of the protrusion is 0.5mm-0.9mm; And / or, the depth of the gasification groove is 0.5mm-0.9mm.

10. The flow boiling experimental device according to claim 1, characterized in that: The side wall of the base is provided with a plurality of blind holes, the blind holes being spaced apart along the length direction of the groove, and the blind holes being located below the vaporization tank. The flow boiling experimental device further comprises: Thermocouples are inserted into the blind holes, and the thermocouples are multiple and correspond one to one with the multiple blind holes.

11. The flow boiling experimental device according to claim 1, characterized in that: The upper cover and the base are connected by fasteners; And / or, the upper cover is an acrylic plate; And / or, the base is an aluminum alloy part.

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