CN112798136B - Window device for measuring temperature of inner surface of turbulent flow guide pipe of electric arc wind tunnel - Google Patents
Window device for measuring temperature of inner surface of turbulent flow guide pipe of electric arc wind tunnel Download PDFInfo
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- CN112798136B CN112798136B CN202011604352.XA CN202011604352A CN112798136B CN 112798136 B CN112798136 B CN 112798136B CN 202011604352 A CN202011604352 A CN 202011604352A CN 112798136 B CN112798136 B CN 112798136B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
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Abstract
The invention provides a window device for measuring the temperature of the inner surface of a turbulent conduit of an electric arc wind tunnel, which comprises: a side plate embedded within the turbulence conduit; the inner wall surface of the side plate is flush with the inner wall surface of the guide pipe; the side plate is provided with an optical window and a cooling window, and the cooling window is positioned at the upstream of the optical window along the direction of hot air flow; optical glass for measurement is installed in the optical window, and the cooling window is used for cooling the optical glass. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel provided by the invention can well solve the problems that optical glass is easily ablated and damaged by high-temperature airflow and the surface temperature measurement problem in the ablation test process of the material of the turbulent conduit of the electric arc wind tunnel in the prior art cannot be solved.
Description
Technical Field
The invention relates to the technical field of aerospace pneumatic ablation thermal corrosion tests, in particular to a window device for measuring the temperature of the inner surface of a turbulent flow conduit of an electric arc wind tunnel.
Background
Aircraft are subjected to severe aerodynamic heating when flying at high speeds in the atmosphere or when re-entering the atmosphere from high altitude, and therefore the outer surfaces of aircraft are usually provided with heat-proof materials, the ablation resistance of which is directly related to the success or failure of the aircraft design. The heat-proof material is subjected to a bottom surface simulation examination test before being applied to an aircraft, and an electric arc wind tunnel is a main ablation material ground simulation examination device; the examination test of the heat-proof material in the electric arc wind tunnel is generally divided into two forms, (1) a free jet test, namely a test model is directly put into a flow field at the outlet of a spray pipe, and the flow field is expanded freely; (2) And (4) a turbulent conduit test, namely installing the model in the cover body at the outlet of the profile spray pipe for performing a thermal examination test.
In the free jet test, the thermal environment state assessed by the method is relatively low for the flat plate heat-proof material model; in a turbulent flow conduit test, a flow field at the outlet of a spray pipe is compressed in a flow channel of a cover body and cannot expand freely, so that the pressure is increased, a thermal examination test needs to be carried out under a higher thermal environment condition, however, because a flat plate model cannot measure the surface temperature of the model through non-contact measuring equipment in the cover body, an optical glass window device needs to be arranged on an electric arc wind tunnel turbulent flow conduit for measurement, the existing optical glass is easy to be ablated and damaged by high-temperature airflow, and the problem of measuring the surface temperature in the ablation test process of the electric arc wind tunnel turbulent flow conduit material cannot be solved.
Disclosure of Invention
The invention provides a window device for measuring the temperature of the inner surface of an electric arc wind tunnel turbulence conduit, and aims to solve the problems that optical glass is easily ablated and damaged by high-temperature airflow and the surface temperature measurement in the ablation test process of an electric arc wind tunnel turbulence conduit material in the prior art cannot be solved.
The invention provides a window device for measuring the temperature of the inner surface of a turbulent conduit of an electric arc wind tunnel, which comprises: a side plate embedded within the turbulence conduit; the inner wall surface of the side plate is flush with the inner wall surface of the guide pipe; the side plate is provided with an optical window and a cooling window, and the cooling window is positioned at the upstream of the optical window along the direction of hot air flow; optical glass for measurement is installed in the optical window, and the cooling window is used for cooling the optical glass.
Furthermore, mounting holes are formed in the side plates; the optical window further comprises a pressing plate, and the optical glass is installed in the installation hole; the optical glass comprises a first optical glass and a second optical glass, the first optical glass is in contact with hot air, and the pressing plate covers the second optical glass and is fixed with the guide pipe. Through setting up the mounting hole in the curb plate to install optical glass in the mounting hole, because first optical glass contacts with the hot gas flow, second optical glass is located the pipe surface, just can accomplish the measurement to measuring model surface temperature through optical glass.
Further, the cooling window comprises a cooling cavity and a cover plate; the cover plate is provided with a cold air inlet pipe, and the top surface of the cooling cavity is provided with a cold air jet hole; the cold air inlet pipe is connected with the air storage device and used for cooling the cooling cavity; the cover plate covers the cooling cavity and is fixed with the guide pipe. The cold air inlet pipe is connected with the air storage device and used for cooling the cooling cavity, the cooling air is discharged from the cold air spraying hole after the cooling cavity is filled with the cooling air, and the cold air discharged from the cold air spraying hole can cool the optical glass because the cooling window is positioned at the upstream of the optical window, so that the optical glass is prevented from being damaged due to high temperature.
Further, the mounting hole is stepped; the mounting holes comprise a first mounting hole and a second mounting hole, first optical glass is mounted in the first mounting hole, and second optical glass is mounted in the second mounting hole; the diameter of the first optical glass is 10mm, and the diameter of the second optical glass is 16mm; the thickness of the first optical glass is 5mm, and the thickness of the second optical glass is 15mm; the size of the mounting hole is equal to that of the optical glass.
Furthermore, mounting grooves are formed in the end faces of the first mounting hole and the second mounting hole; and a sealing ring is arranged in the mounting groove. The mounting groove is formed in the end face of the first mounting hole and the end face of the second mounting hole, the sealing ring is mounted in the mounting groove, sealing performance of the optical glass during mounting can be guaranteed, hot air in the guide pipe is prevented from flowing out of a gap, damage to the optical glass is prevented, and even the hot air burns a human body when observation is conducted.
Furthermore, the pressing plate and the side plate are both provided with first threaded holes with the diameter of 10 mm; the pressing plate is connected with the side plate pipe through a first threaded hole in a bolted mode. The pressing plate is connected with the side plate through the bolt, so that the connection tightness can be guaranteed, and the disassembly is convenient.
Further, the cooling cavity is in a step shape; the length of cooling cavity is 13mm, the width of cooling cavity is 8mm. The cooling cavity is designed to be in a step shape, the flow direction of cold air flow is changed, the whole cavity is filled with the cold air flow, and the problem that the cooling effect is poor due to uneven flow on each cold air injection hole is solved.
Furthermore, a sealing ring is arranged on the connecting surface of the cover plate; and the cover plate and the side plate are provided with second threaded holes, and the cover plate is connected with the side plate through the second threaded holes by bolts. The sealing ring is arranged on the connecting surface of the cover plate, so that the whole connecting sealing performance can be ensured when the cover plate is pressed on the cooling cavity.
Further, the cold air spraying holes are formed in the top surface of the cooling cavity and are 13mm away from the outer surface of the side plate; the number of the cold air injection holes is 5, and the shape of each cold air injection hole is arc-shaped; the included angle between the cold air injection holes and the central line of the side plate is-20 degrees to 20 degrees, and the included angle between the adjacent cold air injection holes is 10 degrees. Through the cold air jet hole designed in this way, the effective cooling range of the cold air jet hole can be ensured, and the effective cooling of the optical glass is increased.
Further, the cold air inlet pipe is welded on the cover plate, and the diameter of the cold air inlet pipe is 5mm.
According to the window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel, the optical window and the cooling window are arranged on the side plate, the cooling window is positioned at the upstream of the optical window, and when the optical glass is used for measuring, the cooling window can be used for cooling the optical glass, so that the optical glass of the window is prevented from being ablated and damaged by high-temperature air flow, and the problem of measuring the surface temperature in the ablation test process of the material of the turbulent conduit of the electric arc wind tunnel is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of an installation of a window assembly and a conduit according to an embodiment of the present invention;
FIG. 2 is a front view of a window assembly according to an embodiment of the present invention;
FIG. 3 is a side view of a window assembly according to an embodiment of the present invention;
FIG. 4 is a rear view of a window assembly provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a main body of a window device according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of c-c provided by an embodiment of the present invention;
FIG. 7 is a side view of a cooling window provided by an embodiment of the present invention;
FIG. 8 is a front view of a cooling window provided by an embodiment of the present invention;
FIG. 9 is a front view of an optical glass provided by an embodiment of the present invention;
FIG. 10 is a side view of an optical glass according to an embodiment of the present invention.
Description of reference numerals:
the device comprises a guide pipe 1, a side plate 11, a mounting hole 12, a first mounting hole 13, a second mounting hole 14 and a sealing ring 15, wherein the guide pipe is a guide pipe; 2 is an optical window, 21 is optical glass, 22 is a pressing plate, 23 is first optical glass, 24 is second optical glass, and 25 is a first threaded hole; 3 is a cooling window, 31 is a cooling cavity, 32 is a cover plate, 33 is a cold air inlet pipe, 34 is a cold air injection hole, and 35 is a second threaded hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Specifically, referring to fig. 1-2, the present invention provides a window device for measuring the temperature of the inner surface of an electric arc wind tunnel turbulent conduit 1, comprising: a side plate 11 embedded in the turbulence conduit 1; the inner wall surface of the side plate 11 is flush with the inner wall surface of the guide pipe 1; the side plate 11 is provided with an optical window 2 and a cooling window 3, and the cooling window 3 is positioned at the upstream of the optical window 2 along the direction of hot air flow; the optical window is arranged at the middle downstream position of the side plate along the direction of hot air flow; optical glass 21 for measurement is installed in the optical window 2, and the cooling window 3 is used for cooling the optical glass 21.
The effect of arranging the optical window at a position mid-downstream of the side plate is that if the optical window is arranged at a position upstream of the side plate, the total enthalpy of the gas flow upstream may be affected, whereas if the optical window is arranged at a position mid-downstream of the side plate, the total enthalpy of the gas flow is less affected.
Further, the opposite side of the side plate 11 is a flat plate model, the flat plate model is arranged inside the conduit 1, and the optical glass 21 on the side plate 11 is used for measuring the temperature of the flat plate model.
Furthermore, a water cooling channel is arranged inside the side plate 11, so that the surface temperature of the side plate 11 is ensured to be low.
Specifically, referring to fig. 2 to 3, the optical window 2 is mounted on the side plate 11, the optical window 2 includes a pressing plate 22 and an optical glass 21, the pressing plate 22 is pressed on the optical glass 21, and the optical glass 21 is used for measuring the surface temperature of the measurement model.
Further, as shown in fig. 5 to 6, a mounting hole 12 is formed in the side plate 11, and the optical glass 21 is mounted in the mounting hole 12; the optical glass 21 comprises a first optical glass 23 and a second optical glass 24, the first optical glass 23 is contacted with hot air, and the pressing plate 22 covers the second optical glass 24 and is fixed with the guide pipe 1. By forming the mounting hole 12 in the side plate 11 and mounting the optical glass 21 in the mounting hole 12, since the first optical glass 23 is in contact with the hot air flow and the second optical glass 24 is located on the surface of the guide pipe 1, the measurement of the surface temperature of the measurement model can be completed through the optical glass 21.
Further, referring to fig. 6 and 9-10, the mounting hole 12 is stepped; the mounting holes 12 comprise a first mounting hole 13 and a second mounting hole 14, a first optical glass 23 is mounted in the first mounting hole 13, and a second optical glass 24 is mounted in the second mounting hole 14; it is to be noted that the sizes of the first optical glass 23 and the second optical glass 24 may be set to any sizes as long as the purpose of detection can be seen. Preferably, the diameter of the first optical glass 23 is 10mm, and the diameter of the second optical glass 24 is 16mm; the thickness of the first optical glass 23 is 5mm, and the thickness of the second optical glass 24 is 15mm; the size of the mounting hole 12 is equal to the size of the optical glass 21.
Further, referring to fig. 6, mounting grooves are formed in end surfaces of the first mounting hole 13 and the second mounting hole 14; and a sealing ring 15 is arranged in the mounting groove. The mounting grooves are formed in the end faces of the first mounting hole 13 and the second mounting hole 14, the sealing ring 15 is mounted in the mounting grooves, the sealing performance of the optical glass 21 during mounting can be guaranteed, hot air in the guide pipe 1 is prevented from flowing out of gaps, damage to the optical glass 21 is prevented, and even the hot air burns a human body when observation is carried out.
Further, referring to fig. 2 and 5, the pressing plate 22 and the side plate 11 are both provided with a first threaded hole 25 with a diameter of 10 mm; the pressing plate 22 is bolted to the side plate 11 through a first threaded hole 25. The pressing plate 22 is connected with the side plate 11 through bolts, so that the connection tightness can be ensured, and the disassembly is convenient.
Further, the optical glass 21 is commonly used quartz glass, and the safe use temperature is 600-700 ℃.
Specifically, referring to fig. 1, the cooling window 3 is installed on the side plate 11, the cooling window 3 is located upstream of the optical window 2 along the hot air flow direction, and the purpose of arranging the cooling window 3 upstream of the optical window 2 is that when the optical glass 21 is used for measurement, the cooling window 3 can be used for cooling the optical glass 21, so as to prevent the optical glass 21 of the window from being ablated and damaged by high-temperature air flow, and solve the problem of measuring the surface temperature in the ablation test process of the arc wind tunnel turbulent conduit material.
Further, referring to fig. 2 and 5, the cooling window 3 includes a cooling cavity 31 and a cover plate 32; a cold air inlet pipe 33 is arranged on the cover plate 32, and a cold air jet hole 34 is formed in the top surface of the cooling cavity 31; the cold air inlet pipe 33 is connected with the air storage device and used for cooling the cooling cavity 31; the cover plate 32 covers the cooling cavity 31 and is fixed to the pipe 1. The cold air inlet pipe 33 is connected with the air storage device and used for cooling the cooling cavity 31, the cooling air is discharged from the cold air injection hole 34 after filling the whole cavity, and the cold air discharged from the cold air injection hole 34 can cool the optical glass 21 because the cooling window 3 is positioned at the upstream of the optical window 2, so that the optical glass 21 is prevented from being damaged due to high temperature.
Further, referring to fig. 4 to 5, the size of the cooling chamber 31 is not limited, and may be set to any size. Preferably, the cold air cavity 31 has the size of 13mm in length and 8mm in width; the cooling window 3 is arranged at the position of 15-20 mm at the upstream of the optical window 2; the minimum distance between the cold air cavity 31 and the outer surface of the side plate 11 is 5mm.
Further, referring to fig. 6, the cooling cavity 31 is stepped; the step on the cooling chamber 31 is 5mm long and 4.5mm wide from the bottom surface where the cold air injection hole 34 is located. By designing the shape of the cooling cavity 31 to be a step shape, the flow direction of the cold air flow is changed to fill the whole cavity, and the uneven flow on each cold air injection hole 34 is avoided, so that the cooling effect is reduced.
Further, as shown in fig. 4 and 6, a cold air injection hole 34 is formed in the top surface of the cooling cavity 31, and the distance between the cold air injection hole 34 and the outer surface of the side plate 11 is 13mm. The number of the cold air injection holes 34 may be set to any number as long as the cooling of the optical glass 21 can be achieved. Preferably, the number of the cold air spray holes 34 is 5, and the shape of the cold air spray holes 34 is a circular arc; the upper and lower included angles of the cold air injection holes 34 and the central line of the side plate 11 are-20 degrees to 20 degrees, and the included angle between the adjacent cold air injection holes 34 is 10 degrees. By the cold air injection holes 34 designed in this way, the effective cooling range of the cold air injection holes 34 can be ensured, and the effective cooling of the optical glass 21 can be increased.
Further, as shown in fig. 7-8, a cold air inlet pipe 33 is welded to the cover plate 32, and the diameter of the cold air inlet pipe 33 is 5mm. The cold air inlet pipe 33 is connected with an air storage device with a pressure adjusting device at the upstream through threads, air flow in the air pipe directly enters the step and then is filled in the whole cooling cavity 31, and the quantity of the air sprayed by each cold air spraying hole 34 in the cooling cavity 31 is ensured to be consistent. The air inlet pressure of the cold air inlet pipe 33 is only 20-50 kPa, and a high-pressure air source is not required to be used; the inlet pressure of the cold air inlet pipe 33 is set to 20-50 kPa, so that the cold air is ensured to flow along the boundary layer of the inner wall surface of the side plate 11, and the high-temperature incoming flow is prevented from being blocked.
Further, referring to fig. 6, the connection surface of the cover plate 32 is provided with a sealing ring 15; the cover plate 32 and the side plate 11 are both provided with second threaded holes 35, and the cover plate 32 is connected with the side plate 11 through the second threaded holes 35 by bolts. By providing the seal ring 15 on the joint surface of the cover plate 32, the overall joint sealing performance can be ensured when the cover plate 32 is pressed against the cooling cavity 31.
When the model thermal examination test is carried out in the guide pipe when the electric arc wind tunnel operates, firstly, the optical glass is ensured to be carried out under the condition of safe temperature by adjusting the cold air inlet pressure (within the range of 20-50 kPa), and then the temperature of the flat model is measured through the optical glass.
Under a certain thermal environment condition, the surface temperature of the air film cooling surface monitored under the condition of 50kPa cold air pressure is as high as 900 ℃ in the upper edge area and the lower edge area of the model which is not cooled by the air film, and the surface temperature of the middle air film cooling area is only 300-350 ℃, so that the window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel has a good cooling effect.
Therefore, according to the window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel, provided by the invention, the optical window and the cooling window are arranged on the side plate, and the cooling window is positioned at the upstream of the optical window, so that when the optical glass is used for measuring, the cooling window can be used for cooling the optical glass, the optical glass of the window is prevented from being ablated and damaged by high-temperature air flow, and the problem of measuring the surface temperature in the ablation test process of the material of the turbulent conduit of the electric arc wind tunnel is solved.
Furthermore, the window device for measuring the temperature of the inner surface of the turbulent flow conduit of the electric arc wind tunnel, provided by the invention, has the advantages of reasonable structure, simplicity in installation and disassembly, and capability of ensuring the repeated use of optical glass and reducing the test cost.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A window device for measuring the temperature of the inner surface of a turbulent conduit of an electric arc wind tunnel is characterized by comprising: a side plate embedded in the turbulent conduit;
the inner wall surface of the side plate is flush with the inner wall surface of the guide pipe;
the side plate is provided with an optical window and a cooling window, and the cooling window is positioned at the upstream of the optical window along the direction of hot air flow;
optical glass for measurement is installed in the optical window, and the cooling window is used for cooling the optical glass;
the cooling window comprises a cooling cavity, a plurality of cold air injection holes are formed in the top surface of the cooling cavity, and the cold air injection holes are arranged at the upstream of the optical glass.
2. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 1, wherein a mounting hole is formed in the side plate;
the optical window further comprises a pressing plate, and the optical glass is installed in the installation hole;
the optical glass comprises first optical glass and second optical glass, the first optical glass is in contact with hot air, and the pressing plate covers the second optical glass and is fixed with the guide pipe.
3. The window arrangement for electric arc wind tunnel turbulence duct internal surface temperature measurement as claimed in claim 1, characterized in that said cooling window comprises a cover plate;
the cover plate is provided with a cold air inlet pipe;
the cold air inlet pipe is connected with the air storage device and is used for cooling the cooling cavity;
the cover plate covers the cooling cavity and is fixed with the guide pipe.
4. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 2, wherein the mounting hole is stepped;
the mounting holes comprise a first mounting hole and a second mounting hole, first optical glass is mounted in the first mounting hole, and second optical glass is mounted in the second mounting hole;
the diameter of the first optical glass is 10mm, and the diameter of the second optical glass is 16mm;
the thickness of the first optical glass is 5mm, and the thickness of the second optical glass is 15mm;
the size of the mounting hole is equal to that of the optical glass.
5. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 4, wherein an installation groove is formed in the end surface of the first installation hole, which is in contact with the second installation hole;
and a sealing ring is arranged in the mounting groove.
6. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 5, wherein the pressure plate and the side plate are both provided with first threaded holes with the diameter of 10 mm;
the pressing plate is connected with the side plate through a first threaded hole.
7. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 3, wherein the cooling cavity is in a step shape;
the length of cooling cavity is 13mm, the width of cooling cavity is 8mm.
8. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 3, wherein a sealing ring is arranged on the connecting surface of the cover plate;
and the cover plate and the side plate are provided with second threaded holes, and the cover plate is connected with the side plate through the second threaded holes by bolts.
9. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 3, wherein the cold air spraying hole is formed in the top surface of the cooling cavity and is 13mm away from the outer surface of the side plate;
the number of the cold air injection holes is 5, and the shape of each cold air injection hole is arc-shaped;
the included angle between the cold air injection holes and the central line of the side plate is-20 degrees to 20 degrees, and the included angle between each two cold air injection holes is 10 degrees.
10. The window device for measuring the temperature of the inner surface of the turbulent conduit of the electric arc wind tunnel according to claim 3, wherein the cold air inlet pipe is welded on the cover plate, and the diameter of the cold air inlet pipe is 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011604352.XA CN112798136B (en) | 2020-12-29 | 2020-12-29 | Window device for measuring temperature of inner surface of turbulent flow guide pipe of electric arc wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011604352.XA CN112798136B (en) | 2020-12-29 | 2020-12-29 | Window device for measuring temperature of inner surface of turbulent flow guide pipe of electric arc wind tunnel |
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| CN112798136A CN112798136A (en) | 2021-05-14 |
| CN112798136B true CN112798136B (en) | 2023-01-24 |
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| CN202011604352.XA Active CN112798136B (en) | 2020-12-29 | 2020-12-29 | Window device for measuring temperature of inner surface of turbulent flow guide pipe of electric arc wind tunnel |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1047440C (en) * | 1996-01-25 | 1999-12-15 | 董志威 | Optic temperature sensor with permeable speculum |
| US6733173B1 (en) * | 1996-12-19 | 2004-05-11 | Diamond Power International, Inc. | Pyrometer for measuring the temperature of a gas component within a furnace |
| EP1140626B1 (en) * | 1998-12-21 | 2003-03-05 | AlliedSignal Inc. | Ir diode based high intensity light |
| CN102422179A (en) * | 2009-04-21 | 2012-04-18 | 密歇根宇航公司 | Atmospheric measurement system |
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