Optical reflection measuring device for high-temperature wind tunnel environment and wind tunnel

Abstract

The utility model relates to high temperature wind tunnel technical field especially relates to a kind of optical reflection measurement device and wind tunnel for under high temperature wind tunnel environment.Optical reflection measurement device includes water-cooling pedestal and reflector, wherein, one side of water-cooling pedestal is equipped with embedding groove, and at least in the inside of water-cooling pedestal and the region corresponding with embedding groove is equipped with cooling water channel.Cooling water channel is communicated with water inlet pipe and water outlet pipe respectively.Reflector is embedded and installed in embedding groove, and the side surface towards embedding groove groove bottom is tightly attached to the groove bottom of embedding groove.The device is cooled to main body structure by the way of forced convection heat exchange, solve the failure problem of reflector under high temperature environment, and water-cooling structure guarantees the stable work of reflector under high temperature environment, can realize the water-cooling effect of reflector, so that the temperature rise of reflector under high temperature environment is limited, avoids or reduces its high-temperature oxidation, coating peeling and other problems.Wind tunnel includes the above-mentioned optical reflection measurement device, realizes more direction observation and measurement.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature wind tunnel technology, and in particular to an optical reflection measurement device and a wind tunnel for use in high-temperature wind tunnel environments. Background Technology

[0002] Currently, optical testing in high-temperature environments sometimes requires the use of reflected light paths due to limitations in viewing angle and field of view, in order to ensure observation of the surface of a specific object. However, in high-temperature environments, reflectors typically deform and break due to heat. For example, in a high-temperature wind tunnel environment, it is impossible to observe and measure the front end of the model when it is directly facing the wind tunnel nozzle. In this case, it is necessary to establish an optical path system inside the wind tunnel test section and attach reflectors to the front wall of the wind tunnel near the nozzle, using reflection to achieve observation and measurement of the front end of the model.

[0003] Using reflectors in a high-temperature wind tunnel environment has the following drawbacks: (1) High temperature problem: Because the reflector is close to the high temperature flow field, its surface temperature is too high (>300℃). High temperature will cause the coating on the reflector surface to peel off and oxidize, which will increase the relative surface roughness and make the reflector unable to be used for a long time.

[0004] (2) Limitations of reflector materials: Traditional reflectors mostly use glass as the base material and are covered with a metal coating. They are prone to oxidation and deterioration in high-temperature environments, and the reflectivity drops sharply. In particular, the reflectivity in the infrared band is severely degraded, which directly affects the accuracy of infrared testing. Utility Model Content

[0005] The purpose of this invention is to provide an optical reflection measurement device and a wind tunnel for use in high-temperature wind tunnel environments, thereby solving at least one technical problem in the prior art regarding the use of reflectors in high-temperature wind tunnel environments.

[0006] To achieve the above objectives, in a first aspect, this utility model provides an optical reflection measurement device for use in a high-temperature wind tunnel environment, comprising: The water-cooled base has an embedded groove on one side, and at least in the area inside the water-cooled base corresponding to the embedded groove, there is a cooling water channel, which is connected to the inlet pipe and the outlet pipe respectively. The reflector is embedded in the groove, with its side facing the bottom of the groove in close contact with the bottom of the groove.

[0007] Optionally, the cooling water channel includes a branch channel, a confluence channel, and multiple branch channels. The multiple branch channels are located between the branch channel and the confluence channel and are evenly spaced. One end of each branch channel is connected to the branch channel, and the other end is connected to the confluence channel. The branch channel is used to connect to the inlet pipe, and the confluence channel is used to connect to the outlet pipe.

[0008] Optionally, the inlet end of the diversion channel is connected to an inlet connector, which is connected to the inlet pipe. The outlet end of the manifold is connected to an outlet connector, which is connected to the outlet pipe.

[0009] Optionally, the insert groove is rectangular, and the shape of the reflector is a rectangle that matches the shape of the insert groove.

[0010] Optionally, on at least one opposite side of the water-cooled base, each side is provided with a plurality of threaded holes at intervals. The threaded holes are connected to the embedded grooves, and the threaded holes and the cooling water channels are not on the same plane. The bolts can pass through the threaded holes and abut against the reflector. The clamping degree of the bolts on the reflector can be adjusted by adjusting the length of the bolts extending out of the threaded holes.

[0011] Optionally, one side wall of the embedding groove has an inclined surface that is tilted away from the direction of the reflector.

[0012] Optionally, the water-cooled base is made of stainless steel.

[0013] Optionally, the reflector uses a metal substrate, and a silver film layer or an aluminum film layer is provided on the surface of the metal substrate facing away from the bottom of the embedding groove.

[0014] Alternatively, the metal substrate may be made of stainless steel or aluminum alloy.

[0015] Secondly, this utility model also provides a wind tunnel, including an optical reflection measurement device implemented in any of the first aspects.

[0016] The above-mentioned technical solution of this utility model has the following advantages: This utility model provides an optical reflection measurement device for high-temperature wind tunnel environments, comprising a water-cooled base and a reflector. The water-cooled base has an embedding groove on one side, and cooling water channels are provided at least in the area corresponding to the embedding groove inside the water-cooled base. The cooling water channels are connected to an inlet pipe and an outlet pipe. The reflector is embedded in the embedding groove, with its side facing the bottom of the groove in close contact with the bottom of the groove. This device achieves cooling of the main structure through forced convection heat transfer, solving the failure problem of traditional reflectors in high-temperature environments. The effective water-cooling structure ensures stable operation of the reflector in high-temperature environments, achieving a water-cooling effect that limits the temperature rise of the reflector in high-temperature environments, avoiding or reducing problems such as high-temperature oxidation and coating peeling.

[0017] The wind tunnel provided by this utility model, including the aforementioned optical reflection measurement device, can achieve observation and measurement of the interior in more directions through reflection. Furthermore, the optical reflection measurement device achieves cooling of the main structure through forced convection heat transfer, solving the failure problem of traditional reflectors in high-temperature environments. The effective water-cooling structure ensures the stable operation of the reflector in high-temperature environments. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of an optical reflection measuring device according to an embodiment of the present invention; Figure 2 yes Figure 1 Side view schematic diagram of the optical reflection measurement device; Figure 3 yes Figure 2 A schematic diagram of the AA cross-section of the optical reflection measuring device; Figure 4 yes Figure 1 A schematic diagram of the disassembled state of the optical reflection measurement device.

[0020] In the picture: 1: Water-cooled base; 11: Embedded slot; 111: Inclined surface; 12: Cooling water channel; 121: Diversion channel; 122: Convergence channel; 123: Tributary channel; 13: Threaded hole; 2: Reflector; 3: Water inlet connector; 4: Water outlet connector. Detailed Implementation

[0021] 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.

[0022] like Figures 1-4 As shown in the figure, the optical reflection measurement device for high-temperature wind tunnel environment provided by this utility model embodiment includes a water-cooled base 1 and a reflector 2.

[0023] The water-cooled base 1 has an embedding groove 11 on one side, and a cooling water channel 12 is provided inside the water-cooled base 1 in at least the area corresponding to the embedding groove 11 (the area corresponding to the bottom of the groove). The cooling water channel 12 is connected to the inlet pipe 3 and the outlet pipe 4 respectively. The reflector 2 is embedded in the embedding groove 11, and the side facing the bottom of the embedding groove 11 is in close contact with the bottom of the embedding groove 11.

[0024] During use, cooling water enters through the inlet pipe, flows inside the water-cooled base 1, and is finally discharged through the outlet pipe. The main structure is cooled by forced convection heat transfer, which solves the problem of failure of traditional reflectors in high-temperature environments. The effective water-cooling structure ensures the stable operation of reflector 2 in high-temperature environments, achieves the water-cooling effect of reflector 2, and limits the temperature rise of reflector 2 in high-temperature environments, avoiding or reducing problems such as high-temperature oxidation and coating peeling. It can also significantly improve measurement accuracy.

[0025] See one example. Figure 2 and Figure 3 As shown, the cooling water channel 12 includes a branch channel 121, a confluence channel 122, and multiple branch channels 123. The multiple branch channels 123 are located between the branch channel 121 and the confluence channel 122 and are evenly spaced. One end of each branch channel 123 is connected to the branch channel 121, and the other end is connected to the confluence channel 122. The branch channel 121 is used to connect to the inlet pipe, and the confluence channel 122 is used to connect to the outlet pipe. This design of the cooling water channel 12 ensures uniform water flow distribution and efficient heat exchange. In a specific example, a water pressure of 1.0 MPa is used, and the rapid flow of high-pressure water effectively improves cooling efficiency and ensures cooling effect.

[0026] For easy connection to the inlet and outlet pipes, see the example below. Figure 3 and Figure 4 As shown, the inlet end of the diversion channel 121 is connected to an inlet connector 3, which is connected to the inlet pipe. The outlet end of the confluence channel 122 is connected to an outlet connector 4, which is connected to the outlet pipe.

[0027] In this embodiment, the reflector 2 and the water-cooled base 1 can be fixed by adhesive bonding, or the reflector 2 can be fixed by embedding through shape matching.

[0028] In this embodiment, preferably, the reflector 2 is embedded in the embedding groove 11, and the reflective surface of the reflector 2 is not higher than the groove opening plane of the embedding groove 11. For example, the reflective surface of the reflector 2 is flush with or lower than the groove surface of the embedding groove 11.

[0029] In this embodiment, the shape of the embedding groove 11 is generally set according to the shape of the reflector 2, such as a circle, a semicircle, or an ellipse, etc., and is not limited here. In one example, the embedding groove 11 is rectangular, and the shape of the reflector 2 is a rectangle that matches the shape of the embedding groove 11. Based on this, in order to facilitate the installation and adjustment of the reflector and reduce the processing and assembly accuracy of the device, preferably, at least one opposite side of the water-cooled base 1 is provided with a plurality of threaded holes 13 at intervals on each side. The threaded holes 13 communicate with the embedding groove 11, and the threaded holes 13 are not on the same plane as the cooling water channel 12 to avoid damaging the cooling water channel 12. This structure can be abutted against the reflector 2 by bolts (not shown in the figure) passing through the threaded holes 13, and the clamping degree of the bolt on the reflector 2 can be adjusted by adjusting the length of the bolt extending out of the threaded hole 13. This structure can reliably fix the reflector 2 without the reflector 2 being completely flat and tightly fitted by bolt clamping, and the installation and disassembly are more convenient.

[0030] To further facilitate the installation and removal of reflector 2, see one example. Figure 1 and Figure 4 As shown, one side wall of the embedding groove 11 has an inclined surface 111 that is inclined away from the reflector 2. While ensuring that the reflector 2 is reliably fixed, the reflector 2 is kept at a certain distance from the groove wall on this side, so that the reflector 2 can be pried out with the help of tools.

[0031] In this embodiment, the water-cooled base 1 is preferably made of stainless steel, which has good high temperature resistance and corrosion resistance.

[0032] To further improve thermal conductivity and reduce the temperature of reflector 2, in one example, reflector 2 uses a metal substrate, such as stainless steel or aluminum alloy. A silver or aluminum film layer is deposited on the surface of the metal substrate facing away from the bottom of the embedding slot, exhibiting high reflectivity in the infrared band (silver or aluminum film reflectors have a reflectivity of over 90% in the infrared band) and excellent thermal conductivity. The side of reflector 2 facing the bottom of the embedding slot is in close contact with the bottom of the slot, ensuring good thermal conductivity, reducing the reflector temperature, delaying the oxidation of the coating, and enabling stable operation for extended periods in an environment of 300°C. Compared to glass substrate coated reflectors, metal substrate metal-coated reflectors exhibit significantly improved high-temperature stability, providing a solid foundation for observation and testing.

[0033] In one example, the technical specifications of the reflector are as follows: (1) Coating material: high-purity silver or aluminum (purity > 99.9%); (2) Coating thickness: 100-200nm; (3) Operating temperature: It can be used for a long time in an environment of 300℃ under water cooling protection; (4) Optical flatness: λ / 10 (λ=632.8nm).

[0034] This embodiment also provides a wind tunnel, with any of the above-mentioned optical reflection measurement devices installed on the internal wall of the wind tunnel to establish an optical path system inside the wind tunnel test section. For example, in a high-temperature wind tunnel environment, the front end of the model faces the wind tunnel nozzle (making it impossible to observe and measure the front end of the model). By attaching the optical reflection measurement device of this embodiment to the front wall of the wind tunnel near the nozzle, the front end of the model can be observed and measured using the reflection method.

[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. An optical reflection measurement device for use in a high-temperature wind tunnel environment, characterized in that, include: A water-cooled base has an embedded groove on one side, and at least in the area inside the water-cooled base corresponding to the embedded groove, a cooling water channel is provided, which is connected to an inlet pipe and an outlet pipe respectively. The reflector is embedded in the embedding groove, and one side of it facing the bottom of the embedding groove is in close contact with the bottom of the groove.

2. The optical reflection measuring device according to claim 1, characterized in that: The cooling water channel includes a branch channel, a confluence channel, and multiple branch channels. The multiple branch channels are located between the branch channel and the confluence channel and are evenly spaced. One end of each branch channel is connected to the branch channel, and the other end is connected to the confluence channel. The branch channel is used to connect to the inlet pipe, and the confluence channel is used to connect to the outlet pipe.

3. The optical reflection measuring device according to claim 2, characterized in that: The inlet end of the diversion channel is connected to an inlet connector, which is connected to the inlet pipe. The outlet end of the manifold is connected to an outlet connector, which is connected to the outlet pipe.

4. The optical reflection measuring device according to claim 1, characterized in that: The embedding groove is rectangular, and the shape of the reflector is a rectangle that matches the shape of the embedding groove.

5. The optical reflection measuring device according to claim 4, characterized in that: On at least two opposite sides of the water-cooled base, each side is provided with a plurality of threaded holes spaced apart. The threaded holes are connected to the embedded groove, and the threaded holes are not on the same plane as the cooling water channel. The bolt passes through the threaded holes and can abut against the reflector. The clamping degree of the bolt on the reflector can be adjusted by adjusting the length of the bolt extending out of the threaded holes.

6. The optical reflection measuring device according to claim 4, characterized in that: One side wall of the embedding groove has an inclined surface that is tilted away from the direction of the reflector.

7. The optical reflection measuring device according to claim 1, characterized in that: The water-cooled base is made of stainless steel.

8. The optical reflection measuring device according to claim 1, characterized in that: The reflector is made of a metal substrate, and a silver film layer or an aluminum film layer is provided on the surface of the metal substrate facing away from the bottom of the embedding groove.

9. The optical reflection measuring device according to claim 8, characterized in that: The metal substrate is made of stainless steel or aluminum alloy.

10. A wind tunnel, characterized in that: Includes the optical reflection measuring device as described in any one of claims 1-9.

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