CN113280995B - Cooling device for high-temperature wind tunnel model - Google Patents
Cooling device for high-temperature wind tunnel model Download PDFInfo
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- CN113280995B CN113280995B CN202110810776.XA CN202110810776A CN113280995B CN 113280995 B CN113280995 B CN 113280995B CN 202110810776 A CN202110810776 A CN 202110810776A CN 113280995 B CN113280995 B CN 113280995B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a cooling device for a high-temperature wind tunnel model. The model is fixed on a middle bracket of the high-temperature wind tunnel in a rod balance and tail support mode, and the cooling device comprises a balance support rod protection assembly and a cold spraying assembly which is arranged in the model and used for cooling the model; the balance support rod protection assembly comprises a balance heat shield and a support rod heat shield; the cold spray assembly comprises an air cooling spray head, an air cooling quick-insertion straight pipe, an air cooling air inlet pipe and an air cooling pipe connecting joint. High-pressure cooling gas of a high-pressure gas source flows into and flows out of the balance support rod from an air cooling air inlet pipe of the inner cavity of the balance support rod, flows through an air cooling pipe connecting joint and an air cooling quick-insertion straight pipe which are arranged on the outer surface of the balance heat shield, is sprayed out from an air cooling spray head, and cools the model and the rod balance in the inner cavity of the model. The cooling device is simple in structure and flexible in use mode, facilitates the disassembly of the model, can quickly reduce the temperature of the model body after the test, eliminates a test error source caused by the initial wall temperature difference, and ensures the quality of test data.
Description
Technical Field
The invention belongs to the field of high-ultrasonic wind tunnel test equipment, and particularly relates to a cooling device for a high-temperature wind tunnel model.
Background
The high-temperature wind tunnel is characterized in that the total incoming flow temperature is extremely high, which causes the temperature rise of the high-temperature wind tunnel model in the whole test process to be higher. Taking the Mach number 7 wind tunnel test state of the HB-2 model as an example, the maximum total temperature of the incoming flow of the wind tunnel is about 2000K, and in the blowing test process of 30s, the temperature rise of a head stagnation area and a tail skirt area of the model reaches above 550 ℃. After the test is finished, the temperature of the model body is also very high, and the high temperature of the model body can bring adverse effects to the development of the subsequent wind tunnel test.
The first is that: if the temperature of the model body cannot be reduced to the normal temperature state before the next wind tunnel test is carried out, the initial conditions of different test vehicle numbers are different, an additional error source is introduced into test data, and the wind tunnel test accuracy is influenced;
secondly, the following steps: if the temperature of the model body is naturally cooled to the normal temperature, more than several hours of time is consumed, the test efficiency is seriously influenced, and the effective utilization of wind tunnel resources is not facilitated;
thirdly, the method comprises the following steps: the high temperature of the model body can bring potential safety hazards, and because the existing wind tunnel adopts a manual mode to replace test model parts or states, workers can be scalded if the temperature of the model body is too high.
For the above reasons, forced cooling after the test of the high-temperature wind tunnel model is required.
Currently, there is a need to develop a cooling device for high temperature wind tunnel models.
Disclosure of Invention
The invention aims to provide a cooling device for a high-temperature wind tunnel model.
The invention relates to a cooling device for a high-temperature wind tunnel model, which is characterized in that wind tunnel incoming flow is taken as the front, the model is fixed on a middle bracket of the high-temperature wind tunnel in a rod balance and tail support mode, the cooling device comprises a balance support rod protection assembly and a cold spray assembly which is arranged in the model and cools the model;
the rod type balance assembly comprises a rod type balance and a balance supporting rod which are fixedly connected from front to back, a supporting rod conical rectifying connecting cover is sleeved at the back end of the balance supporting rod, a channel is arranged on the central axis of the balance supporting rod, and an air cooling air inlet pipe communicated with an external high-pressure air source is arranged in the channel;
the balance support rod protection assembly comprises a balance heat shield and a support rod heat shield; the balance heat shield is sleeved on a rod type balance in the rod type balance assembly, the support rod heat shield is sleeved on a balance support rod in the rod type balance assembly, the balance water cooling shield and the support rod water cooling shield are separated, and a through hole is formed in the balance support rod at the separation position;
the test model is connected with the rod balance through the adapter taper sleeve in a conical surface matching, tensioning and fixing mode, and the front end of the adapter taper sleeve is provided with a fastening nut and is covered with a balance head heat insulation sleeve;
the cold spraying assembly comprises an air cooling spray head, an air cooling quick insertion straight pipe, an air cooling air inlet pipe and an air cooling pipe connecting joint; the air-cooled air inlet pipe penetrates out of the through hole of the balance support rod and is connected with an air-cooled quick insertion straight pipe through an air-cooled pipe connecting joint, the air-cooled quick insertion straight pipe is fixed on a balance heat shield, and an air-cooled spray head is fixed at the front end of the air-cooled quick insertion straight pipe; and high-pressure cooling gas of a high-pressure gas source flows through the air cooling pipe connecting joint and the air cooling quick-insertion straight pipe from the air cooling air inlet pipe, is sprayed out from the air cooling spray head, and cools the test model and the rod balance in the inner cavity of the test model.
Furthermore, the air cooling spray head is a pipe body, and a circular through hole or a conical through hole is formed in the front end of the pipe body; or the front end of the tube body is sealed, and the surface of the tube body is provided with arrayed circular through holes or conical through holes; the conical through hole takes the central axis of the round pipe as the inner side, the outer surface of the round pipe as the outer side, and the diameter of the conical surface of the conical through hole is small inside and large outside.
Furthermore, the air-cooling spray head is a pipe body, and a Laval spray pipe is arranged at the front end of the pipe body; or the front end of the pipe body is sealed, the surface of the pipe body is provided with Laval spray pipes in an array, and the Laval spray pipes are perpendicular to the surface of the circular pipe and are sprayed outwards.
Further, the air-cooled fast-inserting straight pipes comprise a plurality of air-cooled fast-inserting straight pipes which are uniformly distributed along the circumferential direction of the balance heat shield; the air cooling pipe connecting joints and the air cooling air inlet pipes are a plurality of and correspond to the air cooling quick-insertion straight pipes one by one.
Furthermore, two ends of the air-cooled fast-insertion straight pipe are fixed on the outer surface of the balance heat shield through a support.
Furthermore, the material of switching taper sleeve be high strength alloy steel.
Furthermore, the balance head heat insulation sleeve is made of glass fiber reinforced plastics or PEEK materials.
The cooling device for the high-temperature wind tunnel model has the following advantages that:
1. the temperature of the model body is forcibly reduced to a normal temperature state after the test, so that the initial conditions of the wall temperature of the model in each wind tunnel test are ensured to be consistent, the test error caused by the initial wall temperature difference is eliminated, and the quality of test data is ensured;
2. through the cold spray assembly, the temperature of the model body can be quickly reduced after the test, and the time for cooling the model body to the normal temperature is shortened from several hours to dozens of minutes.
The cooling device for the high-temperature wind tunnel model is simple in structure and flexible in use mode, can quickly reduce the temperature of the model body after the test, eliminates test errors caused by initial wall temperature difference, and ensures the quality of test data.
Drawings
FIG. 1 is a front view of a rod balance assembly in a cooling device for a high temperature wind tunnel model according to the present invention;
FIG. 2 is a front view of a balance strut protection assembly in the cooling device for the high temperature wind tunnel model according to the present invention;
FIG. 3 is a partially enlarged view of a balance strut protection component in the cooling device for the high temperature wind tunnel model according to the present invention;
fig. 4 is a perspective partial sectional view of the cooling device for a high temperature wind tunnel model of the present invention.
In the figure, 101, a rod balance assembly 1011, a rod balance 1012, a balance support rod 102, a balance heat shield 105, a support rod heat shield 106, a support rod conical fairing 201, an air cooling spray head 202, an air cooling quick insertion straight pipe 203, an air cooling air inlet pipe 204, an air cooling pipe connecting joint 301, a test model 401, an adapter taper sleeve 501 and a balance head heat shield.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
The model of the cooling device for the high-temperature wind tunnel model is fixed on a middle bracket of the high-temperature wind tunnel in a rod balance and tail support mode by taking wind tunnel incoming flow as the front, and the cooling device comprises a balance support rod protection assembly and a cold spraying assembly which is arranged in the model and used for cooling the model;
as shown in fig. 1, the rod balance assembly 101 comprises a rod balance 1011 and a balance support rod 1012 fixedly connected from front to back, the rear end of the balance support rod 1012 is sleeved with a support rod conical fairing 106, a channel is arranged on the central axis of the balance support rod 1012, and an air-cooled air inlet pipe 203 communicated with an external high-pressure air source is arranged in the channel;
as shown in fig. 2, the balance bar protection assembly includes a balance heat shield 102 and a bar heat shield 105; the balance heat shield 102 is sleeved on a rod type balance 1011 in the rod type balance assembly 101, the support rod heat shield 105 is sleeved on a balance support rod 1012 in the rod type balance assembly 101, the balance water cooling shield 102 and the support rod water cooling shield 105 are separated, and a through hole is formed in the balance support rod 1012 at the separation position;
the test model 301 and the rod balance 1011 are connected in a conical surface matching, tensioning and fixing mode through the adapter taper sleeve 401, the front end of the adapter taper sleeve 401 is provided with a fastening nut, and the adapter taper sleeve is covered with a flat head heat insulation sleeve 501;
as shown in fig. 3, the cold spray assembly comprises an air-cooling spray head 201, an air-cooling fast-insertion straight pipe 202, an air-cooling air inlet pipe 203 and an air-cooling pipe connecting joint 204; the air-cooling air inlet pipe 203 penetrates out of a through hole passing through the balance support rod 1012 and is connected with the air-cooling quick-insertion straight pipe 202 through an air-cooling pipe connecting joint 204, the air-cooling quick-insertion straight pipe 202 is fixed on the balance heat shield 102, and the front end of the air-cooling quick-insertion straight pipe 202 is fixed with the air-cooling spray head 201; as shown in fig. 4, the high-pressure cooling gas from the high-pressure gas source flows from the air-cooling gas inlet pipe 203 through the air-cooling pipe connection joint 204 and the air-cooling quick-insertion straight pipe 202, and is ejected from the air-cooling shower head 201, so that the test model 301 and the rod balance 1011 are cooled in the cavity of the test model 301.
Further, the air cooling nozzle 201 is a pipe body, and a circular through hole or a conical through hole is formed at the front end of the pipe body; or the front end of the tube body is sealed, and the surface of the tube body is provided with arrayed circular through holes or conical through holes; the conical through hole takes the central axis of the round pipe as the inner side, the outer surface of the round pipe as the outer side, and the diameter of the conical surface of the conical through hole is small inside and large outside.
Further, the air-cooling spray head 201 is a pipe body, and a laval nozzle is installed at the front end of the pipe body; or the front end of the pipe body is sealed, the surface of the pipe body is provided with Laval spray pipes in an array, and the Laval spray pipes are perpendicular to the surface of the circular pipe and are sprayed outwards.
Further, the air-cooled fast-insertion straight pipes 202 comprise a plurality of air-cooled fast-insertion straight pipes 202 which are uniformly distributed along the circumferential direction of the balance heat shield 102; the air cooling pipe connecting joints 204 and the air cooling air inlet pipes 203 are respectively provided with a plurality of air cooling quick-insertion straight pipes 202 in one-to-one correspondence.
Further, two ends of the air-cooled fast-plugging straight pipe 202 are fixed on the outer surface of the balance heat shield 102 through a support.
Further, the material of the adapter sleeve 401 is high-strength alloy steel.
Further, the material of the balance head heat insulation sleeve 501 is glass fiber reinforced plastic or PEEK material.
Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, but it can be applied to various fields suitable for the present invention. Additional modifications and refinements of the present invention will readily occur to those skilled in the art without departing from the principles of the present invention, and therefore the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.
Claims (7)
1. A cooling device for a high-temperature wind tunnel model is characterized in that wind tunnel incoming flow is taken as the front, the model is fixed on a middle support of the high-temperature wind tunnel in a rod balance and tail support mode, the cooling device comprises a balance support rod protection assembly and a cold spraying assembly which is arranged in the model and used for cooling the model;
the rod type balance assembly (101) comprises a rod type balance (1011) and a balance supporting rod (1012) which are fixedly connected from front to back, the rear end of the balance supporting rod (1012) is sleeved with a supporting rod conical rectifying connecting cover (106), a channel is arranged on the central axis of the balance supporting rod (1012), and an air cooling air inlet pipe (203) communicated with an external high-pressure air source is arranged in the channel;
the balance bar protection assembly comprises a balance heat shield (102) and a bar heat shield (105); the balance heat shield (102) is sleeved on a rod type balance (1011) in the rod type balance assembly (101), the support rod heat shield (105) is sleeved on a balance support rod (1012) in the rod type balance assembly (101), the balance heat shield (102) and the support rod heat shield (105) are separated, and a through hole is formed in the balance support rod (1012) at the separation position;
the test model (301) is connected with the rod type balance (1011) through the adapter taper sleeve (401) in a conical surface matching, tensioning and fixing mode, and the front end of the adapter taper sleeve (401) is provided with a fastening nut and covered with a balance head heat insulation sleeve (501);
the cold spray assembly comprises an air cooling spray head (201), an air cooling fast-insertion straight pipe (202), an air cooling air inlet pipe (203) and an air cooling pipe connecting joint (204); the air-cooled air inlet pipe (203) penetrates out of a through hole passing through the balance support rod (1012), and is connected with the air-cooled fast-insertion straight pipe (202) through an air-cooled pipe connecting joint (204), the air-cooled fast-insertion straight pipe (202) is fixed on the balance heat insulation cover (102), and the front end of the air-cooled fast-insertion straight pipe (202) is fixed with the air-cooled spray head (201); high-pressure cooling gas of a high-pressure gas source flows through the air-cooling pipe connecting joint (204) and the air-cooling quick-insertion straight pipe (202) from the air-cooling air inlet pipe (203), is sprayed out of the air-cooling spray head (201), and cools the test model (301) and the rod balance (1011) in the inner cavity of the test model (301);
the cooling device forcibly reduces the temperature of the model body to a normal temperature state after the test, ensures that the initial conditions of the wall temperature of the model in each wind tunnel test are consistent, eliminates the test error caused by the initial wall temperature difference and ensures the quality of test data;
the cooling device can rapidly reduce the temperature of the model body after a test through the cold spraying assembly, and the time for cooling the model body to the normal temperature is shortened from several hours to dozens of minutes;
the cooling device reduces the temperature of the model body after the test, eliminates test errors caused by initial wall temperature difference and ensures the quality of test data.
2. The cooling device for the high-temperature wind tunnel model according to claim 1, wherein the air-cooling nozzle (201) is a pipe body, and a circular through hole or a conical through hole is formed in the front end of the pipe body; or the front end of the tube body is sealed, and the surface of the tube body is provided with arrayed circular through holes or conical through holes; the conical through hole takes the central axis of the round pipe as the inner side, the outer surface of the round pipe as the outer side, and the diameter of the conical surface of the conical through hole is small inside and large outside.
3. The cooling device for the high-temperature wind tunnel model according to claim 1, wherein the air-cooling spray nozzle (201) is a pipe body, and a Laval spray pipe is installed at the front end of the pipe body; or the front end of the pipe body is sealed, the surface of the pipe body is provided with Laval spray pipes in an array, and the Laval spray pipes are perpendicular to the surface of the circular pipe and are sprayed outwards.
4. The cooling device for the high-temperature wind tunnel model according to claim 1, wherein the air-cooled fast-plug straight pipes (202) comprise a plurality of air-cooled fast-plug straight pipes (202) which are uniformly distributed along the circumferential direction of the balance heat shield (102); the air cooling pipe connecting joints (204) and the air cooling air inlet pipes (203) are respectively in one-to-one correspondence with the air cooling quick-insertion straight pipes (202).
5. The cooling device for the high-temperature wind tunnel model according to claim 1, wherein two ends of the air-cooled fast-plug straight pipe (202) are fixed on the outer surface of the balance heat shield (102) through supports.
6. The cooling device for the high-temperature wind tunnel model according to claim 1, wherein the adapter sleeve (401) is made of high-strength alloy steel.
7. The cooling device for the high-temperature wind tunnel model according to claim 1, wherein the balance head heat insulation sleeve (501) is made of glass fiber reinforced plastic or PEEK material.
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| CN202110810776.XA CN113280995B (en) | 2021-07-19 | 2021-07-19 | Cooling device for high-temperature wind tunnel model |
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| CN202110810776.XA CN113280995B (en) | 2021-07-19 | 2021-07-19 | Cooling device for high-temperature wind tunnel model |
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| CN115389158A (en) * | 2022-07-18 | 2022-11-25 | 中国航天空气动力技术研究院 | Hypersonic wind tunnel test balance heat insulation device |
| CN115307862B (en) * | 2022-10-11 | 2022-12-09 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel mixed heating gas jet flow test device |
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