CN219776904U - Cooling device for infrared window of arc plasma wind tunnel - Google Patents
Cooling device for infrared window of arc plasma wind tunnel Download PDFInfo
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- CN219776904U CN219776904U CN202320673021.4U CN202320673021U CN219776904U CN 219776904 U CN219776904 U CN 219776904U CN 202320673021 U CN202320673021 U CN 202320673021U CN 219776904 U CN219776904 U CN 219776904U
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- cooling
- infrared window
- wind tunnel
- arc plasma
- air
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- 238000001816 cooling Methods 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 238000010926 purge Methods 0.000 claims abstract description 25
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- 239000002826 coolant Substances 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 8
- 238000009529 body temperature measurement Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 239000005304 optical glass Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- Plasma Technology (AREA)
Abstract
The utility model relates to a cooling device for an infrared window of an arc plasma wind tunnel, and belongs to the technical field of non-contact infrared temperature measurement. The cooling device includes: a compression ring, a cooling jacket; the cooling jacket is of an annular structure, the compression ring is fixedly connected with one end face of the cooling jacket, an arc plasma wind tunnel infrared window is sealed between the compression ring and the cooling jacket, the other end face of the cooling jacket is connected with an arc plasma wind tunnel body in a sealing manner, and a purging chamber is formed between the cooling jacket and the arc plasma wind tunnel body; an independent water cooling channel and an independent air cooling channel are arranged in the cooling jacket, and the water cooling channel uses water as a cooling medium to cool the infrared window; the air cooling channel guides air into the purge chamber as a cooling medium to cool the infrared window. The utility model ensures that the temperature of the infrared window is always in a proper range so as to achieve the optimal infrared radiation transmission performance and ensure the accuracy and reliability of the measured data.
Description
Technical Field
The utility model belongs to the technical field of non-contact infrared temperature measurement, and relates to a cooling device for an infrared window of an arc plasma wind tunnel.
Background
The radiation temperature measurement has wide application in various fields such as aerospace, material science, metal smelting and the like due to the characteristics of high response speed, no upper limit of temperature measurement, no need of contacting a measured target and the like. The arc plasma wind tunnel is main test equipment in an aerospace aerodynamic thermal protection test and is used for simulating an aerodynamic thermal environment in the reentry process of an aerospace vehicle. Because the test process is required to be carried out under the airtight vacuum condition, when the radiation temperature measuring equipment is used for measuring the surface temperature of the model in the arc plasma wind tunnel test process, corresponding infrared windows are required to be adopted according to the requirements of different wavelengths.
When the arc plasma wind tunnel runs for a long time with high power, the tunnel body is heated by high-temperature plasma continuously to cause overhigh temperature, and an optical glass coating technology is generally used for an infrared window to increase the infrared radiation transmittance. Too high a temperature can greatly reduce the transmittance of the optical glass and even damage the coating film, so that a significant deviation is generated in the temperature measurement result.
Disclosure of Invention
The technical solution of the utility model is as follows: the infrared window cooling device for the arc plasma wind tunnel overcomes the defects of the prior art, avoids the influence of high temperature caused by heat transfer of the arc plasma wind tunnel body and radiation heating of high-temperature plasma on the transmittance of the infrared window, ensures that the temperature of the infrared window is always in a proper range, achieves the optimal infrared radiation transmittance performance, and ensures that the measured data are accurate and reliable.
The technical solution of the utility model is as follows: a cooling device for an arc plasma wind tunnel infrared window, the cooling device comprising: a compression ring, a cooling jacket;
the cooling jacket is of an annular structure, the compression ring is fixedly connected with one end face of the cooling jacket, an arc plasma wind tunnel infrared window is sealed between the compression ring and the cooling jacket, the other end face of the cooling jacket is connected with an arc plasma wind tunnel body in a sealing manner, and a purging chamber is formed between the cooling jacket and the arc plasma wind tunnel body;
an independent water cooling channel and an independent air cooling channel are arranged in the cooling jacket, and the water cooling channel uses water as a cooling medium to cool the infrared window; the air cooling channel guides air into the purge chamber as a cooling medium to cool the infrared window.
Preferably, the water cooling channel comprises a water inlet, a water outlet and a water channel, wherein water enters from the water inlet, flows through the water channel and flows out through the water outlet to cool the edge of the infrared window.
Preferably, the water channel is L-shaped in cross section, and the infrared window edge is cooled in both axial and radial directions.
Preferably, the water is warm water.
Preferably, the air cooling channel comprises an air inlet, an air passage and N air outlet holes, each air outlet hole is communicated with the air passage, the N air outlet holes are uniformly distributed in a ring shape along the inner wall of the purging chamber, air enters from the air inlet and flows through the air passage, is sprayed out through the air outlet holes and enters the purging chamber, and the inner side of the infrared window is purged and cooled in the purging chamber, wherein N is more than or equal to 2.
Preferably, the air outlet holes are tangential air outlet holes.
Preferably, the air is compressed air, the compressed air is depressurized to 0.2-0.25 MPa through a pressure reducing valve and then is connected into a flow valve, and the purging flow is controlled to be 0.3-0.35 cubic meters per hour.
Preferably, the clamping ring is of a step annular structure, a first sealing groove is formed in the end face, in contact with the infrared window, of the clamping ring, a second sealing groove is formed in the end face, in contact with the infrared window, of the cooling jacket, and O-shaped sealing rings are embedded in the first sealing groove and the second sealing groove to seal.
Preferably, a third sealing groove embedded O-shaped sealing ring is arranged on the end face, which is attached to the arc plasma tunnel body, of the cooling jacket for sealing.
Preferably, the compression ring and the cooling jacket are made of red copper.
Compared with the prior art, the utility model has the following advantages:
(1) According to the utility model, on one hand, water is used as a medium to cool the edge of the infrared window by using a water cooling means, and on the other hand, compressed air is used as a cooling medium to sweep the surface of the infrared window by using an air cooling means, so that the cooling effect is remarkable.
(2) The cooling water channel adopts an L-shaped water channel. The L-shaped water channel design can cool the edge of the infrared window in the axial direction and the radial direction simultaneously, and prevent the hole body from transferring heat to the edge of the infrared window.
(3) The utility model adopts the tangential air outlet hole, so that the compressed air forms high-pressure cyclone in the cyclone chamber to continuously sweep the surface of the infrared window, thereby preventing the invasion of high-temperature plasma on the infrared window and cooling the infrared window. Simultaneously, the inner surface of the infrared window can be purged, and the adhesion of ablation products in the test process is prevented, so that the transmittance of the infrared window is prevented from being influenced.
Drawings
FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a system configuration according to an embodiment of the present utility model;
fig. 3 is a cross-sectional view of a system structure according to an embodiment of the present utility model.
Detailed Description
The utility model is described in detail below with reference to the drawings and examples.
As shown in fig. 1, 2 and 3, the cooling device for an arc plasma wind tunnel infrared window provided by the utility model comprises: a compression ring 1 and a cooling jacket 2;
the cooling jacket 2 is of an annular structure, one end face of the compression ring 1 and one end face of the cooling jacket 2 are fixedly connected through a plurality of first through holes 1-1 and first threads 2-9 by means of screws, an arc plasma wind tunnel infrared window is sealed between the compression ring 1 and the cooling jacket 2, the other end face of the cooling jacket 2 is in sealing connection with an arc plasma wind tunnel body through a plurality of second through holes 2-6 and a second threaded hole 2-10 on the arc plasma wind tunnel body, and a purging chamber 2-5 is formed between the cooling jacket 2 and the arc plasma wind tunnel body.
An independent water cooling channel and an independent air cooling channel are arranged in the cooling jacket 2, and the water cooling channel uses water as a cooling medium to cool the infrared window; the air cooling channel introduces air as a cooling medium into the purge chamber 2-5 to cool the infrared window.
Preferably, the water cooling channel comprises a water inlet 2-1, a water outlet 2-2 and a water channel 2-8, water enters from the water inlet 2-1, flows through the water channel 2-8 and flows out through the water outlet 2-2 to cool the edge of the infrared window.
The cross section L-shaped of the water channel 2-8 cools the infrared window edge from the axial direction and the radial direction simultaneously, and prevents the hole body from transferring heat to the infrared window edge. The water is normal temperature water.
The air cooling channel comprises an air inlet 2-3, an air channel 2-11 and N air outlet holes 2-4, each air outlet hole 2-4 is communicated with the air channel 2-11, the N air outlet holes 2-4 are uniformly distributed annularly along the inner wall of the purging chamber, air enters from the air inlet 2-3, flows through the air channel 2-11 and is sprayed out through the air outlet holes 2-4 to enter the purging chamber 2-5, purging and cooling are carried out on the inner side of the infrared window in the purging chamber 2-5, and N is more than or equal to 2.
The air outlet holes 2-4 are tangential air outlet holes. The tangential air outlet design can enable the purge gas to form a cyclone gas in the purge chamber 2-5 to purge and cool the inner side of the infrared window and prevent invasion of the infrared window by the high-temperature plasma body, and meanwhile ablation products in the experimental process can be prevented from being attached to the surface of the infrared window.
The air is compressed air, the air source pressure is 2MPa, the compressed air is depressurized to 0.2-0.25 MPa through a pressure reducing valve and then is connected into a flow valve, and the purging flow is controlled to be 0.3-0.35 cubic meter/hour.
The compression ring 1 is of a step annular structure, a first sealing groove 1-2 is formed in the end face, in contact with the infrared window, of the compression ring 1, a second sealing groove 2-7 is formed in the end face, in contact with the infrared window, of the cooling jacket 2, and O-shaped sealing rings are embedded in the first sealing groove 1-2 and the second sealing groove 2-7 for sealing.
And a third sealing groove 2-12 embedded O-shaped sealing ring is arranged on the end surface of the cooling jacket 2, which is attached to the arc plasma wind tunnel body, for sealing.
The compression ring 1 and the cooling jacket 2 are made of red copper, and are resistant to falling and smashing and good in heat conducting performance, so that the durability and reliability of the device are improved.
In practical application, compressed air and water are used as media to cool and purge the edge and the inner surface of the infrared window. The infrared window transmittance is prevented from being affected by high temperature caused by heat transfer of the cavity and radiation heating of high-temperature plasma. The temperature is always in a proper range so as to achieve the optimal infrared radiation transmission performance.
Although the present utility model has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present utility model by using the methods and technical matters disclosed above without departing from the spirit and scope of the present utility model, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present utility model are within the scope of the technical matters of the present utility model.
Claims (10)
1. A cooling device for an arc plasma wind tunnel infrared window, comprising: a compression ring (1) and a cooling jacket (2);
the cooling jacket (2) is of an annular structure, the compression ring (1) is fixedly connected with one end face of the cooling jacket (2), an arc plasma wind tunnel infrared window is sealed between the compression ring (1) and the cooling jacket (2), the other end face of the cooling jacket (2) is in sealing connection with an arc plasma wind tunnel body, and a purging chamber (2-5) is formed between the cooling jacket (2) and the arc plasma wind tunnel body;
an independent water cooling channel and an independent air cooling channel are arranged in the cooling jacket (2), and the water cooling channel uses water as a cooling medium to cool the infrared window; the air cooling channel guides air into the purge chamber (2-5) as a cooling medium to cool the infrared window.
2. The cooling device for the infrared window of the arc plasma wind tunnel according to claim 1, wherein the water cooling channel comprises a water inlet (2-1), a water outlet (2-2) and a water channel (2-8), water enters from the water inlet (2-1), flows through the water channel (2-8) and flows out through the water outlet (2-2) to cool the edge of the infrared window.
3. A cooling device for an infrared window of an arc plasma wind tunnel according to claim 2, characterized in that the water channel (2-8) is L-shaped in cross section, cooling the infrared window edge both axially and radially.
4. A cooling device for an arc plasma wind tunnel infrared window according to any one of claims 2 or 3, characterized in that said water is warm water.
5. The cooling device for the infrared window of the arc plasma wind tunnel according to claim 1, wherein the air cooling channel comprises an air inlet (2-3), an air channel (2-11) and N air outlet holes (2-4), each air outlet hole (2-4) is communicated with the air channel (2-11), the N air outlet holes (2-4) are uniformly distributed in a ring shape along the inner wall of the purging chamber, air enters from the air inlet (2-3) and flows through the air channel (2-11) and is sprayed out through the air outlet holes (2-4) to enter the purging chamber (2-5), and the inner side of the infrared window is purged and cooled in the purging chamber (2-5), wherein N is more than or equal to 2.
6. The cooling device for the infrared window of the arc plasma wind tunnel according to claim 5, wherein the air outlet holes (2-4) are tangential air outlet holes.
7. The cooling device for the infrared window of the arc plasma wind tunnel according to any one of claims 5 or 6, wherein the air is compressed air, the compressed air is depressurized to 0.2-0.25 MPa through a pressure reducing valve and then is connected to a flow valve, and the purging flow is controlled to be 0.3-0.35 cubic meters per hour.
8. The cooling device for the infrared window of the arc plasma wind tunnel according to claim 1, wherein the pressure ring (1) is of a step annular structure, a first sealing groove (1-2) is formed in the end face, in contact with the infrared window, of the pressure ring (1), a second sealing groove (2-7) is formed in the end face, in contact with the infrared window, of the cooling jacket (2), and O-shaped sealing rings are embedded in the first sealing groove (1-2) and the second sealing groove (2-7) for sealing.
9. The cooling device for the infrared window of the arc plasma wind tunnel according to claim 1, wherein the cooling jacket (2) is provided with a third sealing groove (2-12) on the end face, which is attached to the arc plasma wind tunnel body, for sealing, and an O-shaped sealing ring is embedded in the third sealing groove.
10. The cooling device for the infrared window of the arc plasma wind tunnel according to claim 1, wherein the compression ring (1) and the cooling jacket (2) are made of red copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320673021.4U CN219776904U (en) | 2023-03-30 | 2023-03-30 | Cooling device for infrared window of arc plasma wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320673021.4U CN219776904U (en) | 2023-03-30 | 2023-03-30 | Cooling device for infrared window of arc plasma wind tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219776904U true CN219776904U (en) | 2023-09-29 |
Family
ID=88108035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320673021.4U Active CN219776904U (en) | 2023-03-30 | 2023-03-30 | Cooling device for infrared window of arc plasma wind tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219776904U (en) |
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2023
- 2023-03-30 CN CN202320673021.4U patent/CN219776904U/en active Active
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