Water-cooled support for thermal evaluation of arc tunnel flat materials

Abstract

This utility model relates to the field of aerospace material testing equipment technology, and in particular to a water-cooled support for thermal testing of flat plate materials in an arc wind tunnel. It includes a base, a material support block, and support rods. The material support block is fixed to the base via the support rods. The material support block has a receiving groove that matches the flat plate material to be fixed. When the surface of the flat plate material to be tested is flush with the surface of the material support block, the material support block also has a water-cooling channel inside. The support rods include hollow inlet and outlet water rods. One end of the inlet water rod is fixedly connected to the material support block, and the other end is connected to the base. One end of the outlet water rod communicates with the inlet water rod, and the other end is connected to the base. This water-cooled support has independent water-cooling structures for the material support block and support rods, which can meet the requirements for fixing and testing flat plate shape models (samples), achieving efficient cooling, stable clamping, and minimizing thermal interference, thus meeting the requirements for high-precision and repeatable material performance testing, and has a simple structure.

Description

Technical Field

[0001] This utility model relates to the field of aerospace material testing equipment technology, and in particular to a water-cooled support for thermal testing of flat plate materials in electric arc wind tunnels. Background Technology

[0002] With the rapid development of aerospace technology, the application of high-temperature materials in aircraft thermal protection systems is becoming increasingly critical. Electric arc wind tunnels, as core ground-based testing equipment simulating the high-temperature, high-enthalpy airflow environment during hypersonic vehicle reentry, are widely used for performance evaluation and thermal testing of materials under extreme thermal loads.

[0003] In arc wind tunnel testing, the performance of the model (sample) support directly determines the reliability and accuracy of the test data. This is especially true for flat materials, whose large planar structures and edges are susceptible to non-uniform thermal loads, placing higher demands on the thermal management, structural stability, and installation adaptability of the support. Currently, existing water-cooled supports are mostly designed for irregularly shaped or curved samples. When dealing with flat materials, they generally suffer from insufficient cooling efficiency, inadequate installation rigidity, or interference introduced by thermal boundary conditions. This leads to deformation, excessive temperature differences, or distorted ablation behavior of the sample in high-temperature, high-speed airflow, severely affecting the effectiveness and consistency of thermal response parameter acquisition. Therefore, there is an urgent need for a water-cooled support specifically designed for arc wind tunnel thermal testing of flat materials, capable of achieving efficient cooling, stable clamping, and minimizing thermal interference to meet the requirements of high-precision, repeatable material performance testing. Utility Model Content

[0004] The purpose of this invention is to provide a water-cooled support for thermal testing of flat plate materials in electric arc wind tunnels.

[0005] To achieve the above objectives, this utility model provides a water-cooled support for thermal testing of flat plate materials in electric arc wind tunnels, comprising: The base is used to connect to the wind tunnel model feeding system; The material support block has a receiving groove that matches the flat plate material to be fixed. When the flat plate material is installed in the receiving groove, the surface of the flat plate material to be tested is flush with the surface of the material support block. The material support block also has a water cooling channel inside, with the inlet of the water cooling channel connected to the first water inlet pipe and the outlet connected to the first water outlet pipe; and The support rod includes an inlet rod and a return rod, both of which are hollow rods. One end of the inlet rod is fixedly connected to the material support block, and the other end is connected to the base. One end of the return rod is connected to one end of the inlet rod, and the other end is connected to the base. The inlet rod is also provided with an inlet for connecting to the second inlet pipe, and the return rod is also provided with an outlet for connecting to the second outlet pipe.

[0006] Optionally, the material support block includes a frontal surface, a back-flow side, a top side, a bottom side, a guide slope, a first side, and a second side. The first side and the second side are arranged in parallel and spaced apart and are perpendicularly connected to the back-flow side. One end of the guide slope is connected to one end of the second side, and the other end of the guide slope is smoothly connected to the first side. The smooth transition connection surface is the frontal surface. The top side and the bottom side are arranged vertically and spaced apart, and are perpendicularly connected to the back-flow side, the guide slope, the first side, and the second side, respectively. The receiving trough is located on the first side and extends through the backflow side.

[0007] Optionally, the receiving groove is provided with baffles on both sides of the groove opening on the first side, and the test surface of the flat plate material is provided with limiting slides that match the baffles on both sides. When the flat plate material is pushed into the receiving groove from the back flow side, the baffles are located in the limiting slides.

[0008] Optionally, the top side surface is provided with a first countersunk screw hole communicating with the receiving groove; and / or The second side is provided with a second countersunk screw hole that communicates with the receiving groove.

[0009] Optionally, the water-cooling channel is arranged around the receiving tank.

[0010] Optionally, the water-cooling channel includes a ring of inlet channels, a ring of outlet channels, and multiple connecting channels. The inlet channels are located between the top side and the receiving tank, and the outlet channels are located between the bottom side and the receiving tank. The inlet channels and outlet channels are connected by multiple connecting channels arranged at intervals. The inlet of the inlet channels and the outlet of the outlet channels are both located on the back flow side and arranged diagonally opposite each other.

[0011] Optionally, the base is provided with a circular fixing groove, and a ring of spaced fixing screw holes is provided on the bottom of the circular fixing groove; The inlet and outlet rods are connected to the base via a circular adjusting block. The circular adjusting block has two concentrically spaced arc-shaped grooves. The circular adjusting block is embedded in the circular fixing groove. The screw passes through the arc-shaped groove and connects to the fixing screw hole. By rotating the circular adjusting block, the inlet and outlet rods can rotate accordingly, and the screw can be connected to different fixing screw holes.

[0012] Optionally, the arc-shaped groove can be a stepped groove.

[0013] Optionally, a first water inlet connector is provided at the water inlet of the water cooling channel, and the water cooling channel is connected to the first water inlet pipe through the first water inlet connector; The water-cooled channel is equipped with a first water outlet connector at its outlet, and the water-cooled channel is connected to the first water outlet pipe through the first water outlet connector; The water inlet of the water inlet rod is equipped with a second water inlet connector, and the water inlet rod is connected to the second water inlet pipe through the second water inlet connector; The outlet of the return water rod is equipped with a second outlet connector, and the return water rod is connected to the second outlet pipe through the second outlet connector.

[0014] Optionally, the material support block is made of oxygen-free copper.

[0015] The above-mentioned technical solution of this utility model has the following advantages: This utility model provides a water-cooled support for thermal testing of flat plate materials in an electric arc wind tunnel. It includes a base, a material support block, and a support rod. The material support block is fixed to the base via the support rod. The material support block has a receiving groove that matches the flat plate material to be fixed. When the test surface of the flat plate material is flush with the surface of the material support block, the support block also has a water-cooling channel with an outlet and an inlet. The support rod includes an inlet rod and a return rod, both of which are hollow. One end of the inlet rod is fixedly connected to the material support block, and the other end is connected to the base. One end of the return rod is connected to one end of the inlet rod, and the other end is connected to the base. The inlet rod has an inlet, and the return rod has an outlet. The material support block and support rod of this water-cooled support each have independent water-cooling structures, which can meet the requirements for fixing and testing flat plate-shaped models (samples), achieving efficient cooling, stable clamping, and minimizing thermal interference. This meets the requirements for high-precision, repeatable material performance testing, and the structure is simple. Attached Figure Description

[0016] The accompanying drawings are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not be consistent with the actual product.

[0017] Figure 1 This is a schematic diagram of a water-cooled support structure for thermal testing of flat plate materials in an electric arc wind tunnel, as described in this utility model embodiment. Figure 2 yes Figure 1 A front view of the water-cooled support structure; Figure 3 yes Figure 2 Left view of the water-cooled support structure; Figure 4 yes Figure 3 A schematic diagram of the AA cross-section of the water-cooled support; Figure 5 yes Figure 3 BB cross-sectional schematic diagram of the water-cooled support; Figure 6 yes Figure 3 CC cross-sectional schematic diagram of the water-cooled support; Figure 7 This is a schematic diagram of the exploded state structure of a water-cooled support for thermal testing of flat plate materials in an electric arc wind tunnel, according to an embodiment of this utility model. Figure 8This is a structural schematic diagram of a material support block in an embodiment of this utility model; Figure 9 This is a schematic diagram of the structure of a water-cooled bracket after mounting a flat plate material in an embodiment of this utility model; Figure 10 This is a structural schematic diagram of a flat plate material in an embodiment of this utility model; Figure 11 This is a top view of the structure of a water-cooled bracket after mounting a flat plate material in an embodiment of this utility model; Figure 12 yes Figure 11 A schematic diagram of the structure after adjusting the angle between the flat plate material and the airflow.

[0018] In the picture: 1: Base; 11: Circular fixing groove; 12: Fixing screw hole; 2: Material support block; 21: Receiving tank; 211: Retaining strip; 22: Water-cooled aisle; 221: Water inlet channel; 222: Water outlet channel; 223: Connecting passage; 23: Frontal surface; 24: Backflow side; 25: Top and side; 251: First countersunk threaded hole; 26: Bottom side; 27: Guide slope; 28: First side view; 29: Second side view; 291: Second countersunk screw hole; 3: Support rod; 31: Inlet rod; 32: Return water rod; 33: Circular adjusting block; 331: Arc-shaped groove; 4: First water inlet connector; 5: First water outlet connector; 6: Second water inlet connector; 7: Second water outlet connector; 100: Flat plate material; 101: Limiting slide; 200: Airflow. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figures 1-7 As shown in the figure, the water-cooled support for thermal testing of flat plate materials in electric arc wind tunnel provided by this utility model embodiment includes a base 1, a material support block 2 and a support rod 3. The material support block 2 is fixed on the base 1 by the support rod 3. The base 1 is used to be installed on the wind tunnel model feeding system.

[0021] See Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, the material support block 2 is provided with a receiving groove 21 that matches the flat plate material to be fixed. The shape of the receiving groove 21 matches the shape of the flat plate material. When the flat plate material is installed in the receiving groove 21, the test surface of the flat plate material is flush with the surface of the material support block 2. The material support block 2 is also provided with a water cooling channel 22. The water inlet of the water cooling channel 22 is used to connect with the first water inlet pipe, and the water outlet is used to connect with the first water outlet pipe.

[0022] See Figure 1 , Figure 2 and Figure 4 As shown, the support rod 3 includes an inlet rod 31 and a return rod 32. Both the inlet rod 31 and the return rod 32 are hollow rods. One end of the inlet rod 31 is fixedly connected to the material support block 2, and the other end is fixedly connected to the base 1. One end of the return rod 32 is connected to one end of the inlet rod 31, and the other end is connected to the base 1. The inlet rod 31 is also provided with an inlet for connecting to the second inlet pipe, and the return rod 32 is also provided with an outlet for connecting to the second outlet pipe.

[0023] When using, please refer to Figure 9 As shown, the flat plate material 100 is installed in the receiving groove 21, and the test surface of the flat plate material 100 is flush with the surface of the material support block 2. The base 1 is connected to the wind tunnel model feeding system, and the support rod 3 is mainly used to ensure that the material support block 2 is at a suitable height. The material support block 2 and the support rod 3 of this water-cooled bracket each have an independent water-cooling structure, which can meet the fixed installation and testing requirements of the flat plate-shaped model (sample), achieve efficient cooling, stable clamping and minimize thermal interference, so as to meet the requirements of high-precision and repeatable material performance testing, and the structure is simple.

[0024] To expand the application scenarios of this water-cooled support, the airflow-facing end of material support block 2 adopts a pointed structure to ensure that the airflow passes smoothly over the model surface. See also Figure 1 and Figure 8 As shown, in one example, the material support block 2 includes a frontal surface 23, a back-flow side surface 24, a top side surface 25, a bottom side surface 26, a guide slope 27, a first side surface 28, and a second side surface 29. The first side surface 28 and the second side surface 29 are arranged parallel to each other and perpendicularly connected to the back-flow side surface 24. One end of the guide slope 27 is connected to one end of the second side surface 29, and the other end of the guide slope 27 is smoothly connected to the first side surface 28. The smooth transition connection surface is the frontal surface 23. The top side surface 25 and the bottom side surface 26 are arranged vertically and are perpendicularly connected to the back-flow side, the guide slope, the first side surface, and the second side surface, respectively. The receiving groove 21 is disposed on the first side surface 28 and extends through the back-flow side surface 24. In this example, the other end of the guide slope 27 is smoothly connected to the first side surface 28, making the front end of the material support block 2 a pointed structure (similar to a cuboid with one corner obliquely cut off and then rounded off). This ensures that the airflow passes smoothly over the model surface, allowing the water-cooled support to be used in semi-elliptical, semi-circular, or conical nozzles. Furthermore, since the receiving groove 21 extends through the back flow side surface 24, the flat plate material 100 can be pushed into the receiving groove 21 from the back flow side surface 24 during installation, making installation convenient and particularly advantageous for installing and fixing thick, flat plate materials with small areas and large thicknesses.

[0025] To further improve the fixing effect and more easily ensure that the test surface of the flat plate material 100 is flush with the first side surface 28, in one example, see... Figures 8-10 As shown, the receiving groove 21 has baffles 211 on both sides of the groove opening on the first side 28. The test surface of the flat material 100 has limiting slides 101 (open L-shaped notches arranged along the pushing direction of the flat material) that match the baffles 211 on both sides. When the flat material 100 is pushed into the receiving groove 21 from the back flow side, the baffles 211 are located in the limiting slides 101, which play a role in limiting and fixing.

[0026] To further enhance the fixation effect, see one example. Figure 1 As shown, the top side 25 is provided with a first countersunk screw hole 251 communicating with the receiving groove 21, which is used to further fix the plate material 100 by pressing it against the plate material 100 with screws. In another example, the second side 29 is provided with a second countersunk screw hole 291 communicating with the receiving groove 21, which is used to further fix the plate material 100 by pressing it against the plate material 100 with screws. In one example, a stop bar 211, a first countersunk screw hole 251 and a second countersunk screw hole 291 are provided at the same time, which can fix the plate material 100 in three directions, with good fixing effect and convenient adjustment.

[0027] To achieve better cooling, in one example, the water-cooling channel 22 is arranged inside the material support block 2 around the receiving groove 21. See also: Figures 4-6 As shown, the water-cooling channel 22 includes a ring of inlet channels 221, a ring of outlet channels 222, and multiple connecting channels 223. The inlet channels 221 are located between the top side 25 and the receiving tank 21, and the outlet channels 222 are located between the bottom side 26 and the receiving tank 21. The inlet channels 221 and the outlet channels 222 are connected by multiple connecting channels 223 arranged at intervals. The inlet of the inlet channel 221 and the outlet of the outlet channel 222 are both located on the back flow side 24 and are arranged diagonally opposite each other, so that the water can flow around the receiving tank 21 inside the material support block 2, without any stagnant water area, thus ensuring the cooling effect.

[0028] To facilitate the installation, disassembly and replacement of various components, preferably, in this embodiment, the support rod 3 is fixed to the material support block 2 and the base 1 by screws.

[0029] See one example. Figure 7 and Figure 8 As shown, the bottom side 26 of the material support block 2 is provided with an installation groove, and the installation groove is provided with two countersunk screw holes that communicate with the receiving groove 21. The upper end of the water inlet rod 31 is provided with two screw holes. The screw is inserted into the countersunk screw hole in the receiving groove 21 to make the screw pass through the installation groove of the bottom side 26 of the material support block 2 and connect with the screw hole at the upper end of the water inlet rod 31, thereby realizing the connection and fixation between the support rod 3 and the material support block 2.

[0030] See one example. Figure 1 , Figures 5-7 As shown, the base 1 has a circular fixing groove 11, and the bottom of the circular fixing groove 11 has a ring of spaced fixing screw holes 12. The inlet rod 31 and the return rod 32 are connected to the base 1 via a circular adjusting block 33. The inlet rod 31 and the return rod 32 are welded to the circular adjusting block 33. The circular adjusting block 33 has two concentrically spaced arc-shaped grooves 331, which are embedded in the circular fixing groove 11. Screws pass through the arc-shaped grooves 331 and connect to the fixing screw holes 12. (See also...) Figure 11 and Figure 12 As shown, by rotating the circular adjusting block 33, the inlet rod 31 and the return rod 32 can rotate accordingly, thereby driving the material support block 2 and the plate material 100 it is fixed to to rotate. Then, screws can be used to connect to different fixing screw holes to fix the angle of the plate material. This adjustment method allows for adjustment of the angle α between the plate material 100 and the airflow 200 in the plane, meeting the experimental requirements of different angles. Preferably, the arc-shaped groove 331 is a stepped groove to avoid screws being exposed.

[0031] To facilitate connection with the various inlet and outlet pipes, in one example, the water-cooling channel 22 is equipped with a first inlet connector 4 at its inlet, and the water-cooling channel 22 is connected to the first inlet pipe (not shown in the figure) via the first inlet connector 4. The water-cooling channel 22 is equipped with a first outlet connector 5 at its outlet, and the water-cooling channel 22 is connected to the first outlet pipe (not shown in the figure) via the first outlet connector 5. The water inlet of the water inlet rod 31 is equipped with a second inlet connector 6, and the water inlet rod 31 is connected to the second inlet pipe (not shown in the figure) via the second inlet connector 6. The water outlet of the return water rod 32 is equipped with a second outlet connector 7, and the return water rod 32 is connected to the second outlet pipe (not shown in the figure) via the second outlet connector 7.

[0032] In this embodiment, the material support block 2 is made of oxygen-free copper material with high thermal conductivity.

[0033] In this embodiment, the base 1 has fixing holes at its four corners for installation and fixing with the model feeding system.

[0034] It should be noted that screws are not shown in any of the accompanying drawings of this embodiment.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that not every embodiment contains only one independent technical solution. In the absence of any conflict between the solutions, the various technical features mentioned in each embodiment can be combined in any way to form other implementation methods that can be understood by those skilled in the art.

[0036] Furthermore, without departing from the scope of this utility model, modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some of the technical features, shall not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A water-cooled support for thermal testing of flat plate materials in an electric arc wind tunnel, characterized in that, include: The base is used to connect to the wind tunnel model feeding system; A material support block is provided with a receiving groove that matches the flat plate material to be fixed. When the flat plate material is installed in the receiving groove, the surface of the flat plate material to be tested is flush with the surface of the material support block. The material support block also has a water-cooling channel inside, with an inlet for connecting to a first water inlet pipe and an outlet for connecting to a first water outlet pipe. The support rod includes an inlet rod and a return rod, both of which are hollow rods. One end of the inlet rod is fixedly connected to the material support block, and the other end is connected to the base. One end of the return rod is connected to one end of the inlet rod, and the other end is connected to the base. The inlet rod is also provided with an inlet for connecting to a second inlet pipe, and the return rod is also provided with an outlet for connecting to a second outlet pipe.

2. The water-cooled support according to claim 1, characterized in that: The material support block includes a frontal surface, a backal surface, a top surface, a bottom surface, a guide slope, a first surface, and a second surface. The first surface and the second surface are arranged parallel to each other and perpendicularly connected to the backal surface. One end of the guide slope is connected to one end of the second surface, and the other end of the guide slope is smoothly connected to the first surface. The smooth transition connection surface is the frontal surface. The top surface and the bottom surface are arranged vertically and perpendicularly connected to the backal surface, the guide slope, the first surface, and the second surface, respectively. The receiving groove is disposed on the first side and extends through the backflow side.

3. The water-cooled support according to claim 2, characterized in that: The receiving groove is provided with baffles on both sides of the groove opening on the first side. The test surface of the flat material is provided with limiting slides that match the baffles on both sides. When the flat material is pushed into the receiving groove from the back flow side, the baffles are located in the limiting slides.

4. The water-cooled support according to claim 2, characterized in that: The top side surface is provided with a first countersunk screw hole communicating with the receiving groove; and / or The second side is provided with a second countersunk screw hole that communicates with the receiving groove.

5. The water-cooled support according to claim 2, characterized in that: The water-cooling channel is arranged around the receiving tank.

6. The water-cooled support according to claim 5, characterized in that: The water-cooling channel includes a ring of inlet channels, a ring of outlet channels, and multiple connecting channels. The inlet channels are located between the top side and the receiving tank, and the outlet channels are located between the bottom side and the receiving tank. The inlet channels and the outlet channels are connected by multiple connecting channels arranged at intervals. The inlet of the inlet channels and the outlet of the outlet channels are both located on the backflow side and are arranged diagonally opposite each other.

7. The water-cooled support according to claim 1, characterized in that: The base is provided with a circular fixing groove, and a ring of spaced fixing screw holes is provided on the bottom of the circular fixing groove. The inlet rod and the return rod are connected to the base via a circular adjusting block. The circular adjusting block has two concentrically spaced arc-shaped grooves. The circular adjusting block is embedded in the circular fixing groove. The screw passes through the arc-shaped groove and connects to the fixing screw hole. By rotating the adjusting block, the inlet rod and the return rod can rotate accordingly. The screw can connect to different fixing screw holes.

8. The water-cooled support according to claim 7, characterized in that: The arc-shaped groove is a stepped groove.

9. The water-cooled bracket according to claim 1, characterized in that: The water-cooling channel is provided with a first water inlet connector at the water inlet, and the water-cooling channel is connected to the first water inlet pipe through the first water inlet connector; The water cooling channel is provided with a first water outlet connector at its outlet, and the water cooling channel is connected to a first water outlet pipe through the first water outlet connector. The water inlet of the water inlet rod is provided with a second water inlet connector, and the water inlet rod is connected to the second water inlet pipe through the second water inlet connector; The return water rod is provided with a second water outlet connector at its outlet, and the return water rod is connected to the second water outlet pipe through the second water outlet connector.

10. The water-cooled support according to claim 1, characterized in that: The material support block is made of oxygen-free copper.

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