CN110823502B - Whole water-cooling bent in high temperature flow field - Google Patents
Whole water-cooling bent in high temperature flow field Download PDFInfo
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- CN110823502B CN110823502B CN201911140784.7A CN201911140784A CN110823502B CN 110823502 B CN110823502 B CN 110823502B CN 201911140784 A CN201911140784 A CN 201911140784A CN 110823502 B CN110823502 B CN 110823502B
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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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
Abstract
The invention relates to a whole-course water-cooling bent frame of a high-temperature flow field, which comprises a main frame body, an air-facing plate, leather-supported pressure probes, total-temperature probes, water pipes, a triangular support frame and a connecting support rod, wherein the air-facing plate is fixedly connected to one side of the main frame body, the triangular support frame and the connecting support rod are fixedly connected to the other side of the main frame body, a plurality of leather-supported pressure probes and a plurality of total-temperature probes are fixedly connected to the air-facing plate at intervals, the water pipes are arranged at the bottom of the main frame body, two sides of the main frame body and the front end surface of the air-facing plate are respectively provided with a side water channel and a front water channel, each water pipe comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the bottom of the side water channel at one side of the main frame body, the top of the side water channel at one side of the main frame body is respectively, the bent frame is prevented from being ablated, and ideal flow field data is obtained.
Description
Technical Field
The invention relates to the technical field of wind tunnel flow field calibration and measurement, in particular to a whole-course water-cooling bent frame for a high-temperature flow field.
Background
In a hypersonic wind tunnel, in order to prevent gas from condensing due to too low static temperature under the condition of high Mach number, the gas needs to be heated, and under the condition of Mach number of 20, the heating temperature is required to reach 3100K; in order to obtain indexes such as flow field uniformity, Mach number distribution, temperature distribution and the like, a bent frame is generally adopted to measure the total temperature and the Pitot pressure of a wind tunnel flow field, which is also important content and a method for flow field calibration; for the wind tunnel with lower total temperature, the structural design of the measuring bent frame does not generally consider the ablation problem, and only the heat insulation is needed; for the bent used in the wind tunnel with higher total temperature, the problem of bent ablation needs to be considered.
The problem of bent frame ablation is mainly solved by two means, one is to adopt ablation-resistant materials, and the other is to design a water cooling structure to cool the bent frame; ablation resistance materials are adopted, so that the ablation problem can be partially solved, but the ablation resistance temperature is limited, the material price is high, the integral temperature of the bent frame is increased, and the protection of an internal temperature measurement lead and a pressure measurement guide pipe is not facilitated; the water-cooling bent frame is adopted, the problems of the water-cooling effect, the bent frame size and the like need to be solved in the design process, if the water channel is unreasonably designed, the water-cooling effect cannot be achieved, local ablation is caused, the bent frame is too large in design size, a flow field is blocked, and a flow field parameter measurement test cannot be completed.
Therefore, in order to overcome the above disadvantages, it is necessary to provide a high-temperature flow field whole-course water-cooling bent frame.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is the problem of the ablation of the bent frame in a high-temperature flow field.
(II) technical scheme
In order to solve the technical problem, the invention provides a whole-course water-cooling bent frame of a high-temperature flow field, which comprises a main frame body, an air facing plate, leather-support pressure probes, total-temperature probes, a water pipe, a triangular support frame and a connecting support rod, wherein the air facing plate is fixedly connected to one side of the main frame body, the triangular support frame and the connecting support rod are fixedly connected to the other side of the main frame body, a plurality of leather-support pressure probes and a plurality of total-temperature probes are fixedly connected to the air facing plate at intervals, the water pipe is erected at the bottom of the main frame body, two sides of the main frame body and the front end face of the air facing plate are respectively provided with a side water channel and a front water channel, the water pipe comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the bottom of the side water channel on one side of the main frame body, the top of the side water channel on.
Through adopting above-mentioned technical scheme, set up skin support pressure probe and total warm probe on the windward plate, can carry out the total warm of flow field, the measurement of total pressure, set up side water course and front water course simultaneously, utilize the flow of water to take away a large amount of heat energy, play the cooling effect, the cooling water flows in from body frame one side earlier simultaneously, flow in the windward plate again, can avoid the cooling water directly to absorb too much heat when flowing in from the windward plate and flow in the time of the main frame body again, can't carry out effective refrigerated problem to body frame lateral wall, and adopt to flow in the mode that the lane flows out again from one, can make the cooling water cool off windward plate and body frame body simultaneously, guarantee that cooling water can maximize absorbs the heat, and then effectively avoid the framed bent to be ablated by high temperature.
As a further explanation of the present invention, it is preferable that the windward plate front end surface is a circular arc surface and has a pyramid shape.
By adopting the technical scheme, hot gas can be effectively shunted, the heating area of the bent frame is increased, the surface temperature of the bent frame can be reduced in a short time by matching with the flow of cooling water, and the uniform cooling of each part of the bent frame can be ensured due to the large heating area, so that the problem of deformation caused by the large local temperature difference is avoided.
As a further explanation of the present invention, preferably, the rear end face of the windward plate is provided with a plurality of T-shaped cylindrical grooves, the pitot pressure probe and the total temperature probe are inserted into the T-shaped cylindrical grooves, the T-shaped cylindrical grooves are internally threaded with a compression nut, and the compression nut is abutted against one end faces of the pitot pressure probe and the total temperature probe, which are far away from the T-shaped cylindrical grooves.
By adopting the technical scheme, the interface forms of the pitot pressure probe and the total temperature probe are the same, and the pitot pressure probe and the total temperature probe have good interchangeability, so that the bent frames are used for measuring parameters of different flow fields, and the production cost of additional bent frames is saved.
As a further description of the present invention, preferably, the pitot pressure probe and the total temperature probe are respectively abutted with a gasket at an end surface far away from the compression nut, the gasket is abutted with the T-shaped cylindrical groove, and the gasket is made of red copper material.
Through adopting above-mentioned technical scheme, set up in the gasket avoids high-temperature gas to flow into the framed bent, and improve the high temperature resistance and the compressive property of skin support pressure probe and total temperature probe in cylinder groove department.
As a further explanation of the present invention, it is preferable that the main frame body and the windward plate are made of 06Cr25Ni20 material, and the triangular support frame and the connecting strut are made of 30CrMnSiA material.
Through adopting above-mentioned technical scheme, make framed bent self have extremely high temperature resistance to guarantee when the cooling water cooling effect weakens, the framed bent can not produce the risk of being ablated yet, improves the life of framed bent.
As a further explanation of the present invention, it is preferable that the main frame width is 40mm or less.
By adopting the technical scheme, the flow field blockage can be effectively avoided, and the flow field blockage degree is ensured not to exceed 8%.
As a further description of the present invention, it is preferable that the side water channel is a square channel, the front water channel is a cylindrical channel, and the side water channel and the front water channel are respectively formed by slotting and punching.
By adopting the technical scheme, the side water channels are arranged into the square hole channels, so that the flow of cooling water in unit time can be improved to the maximum extent, more cooling water can be ensured to flow into the main frame body, and the cooling efficiency is improved; meanwhile, the front water channel is set to be a cylindrical hole channel, so that the windward plate can be guaranteed to have good structural strength, and the thermal deformation is avoided.
As a further explanation of the present invention, it is preferable that the side flume has a width of 2mm to 3mm and the front flume has an aperture of 2mm to 3 mm.
Through adopting above-mentioned technical scheme, side water course and front water course aperture are the same, avoid appearing the stagnant water district, guarantee that cooling water can be stable smooth circulate in side water course and front water course.
As a further explanation of the present invention, preferably, the pitot pressure probe is connected with a copper tube, the total temperature probe is connected with a temperature compensation wire, a wire channel is arranged between the main frame body and the windward plate, and the copper tube and the temperature compensation wire both extend into the wire channel.
Through adopting above-mentioned technical scheme, set up the wire passageway and receive and release copper pipe and temperature compensation wire, avoid copper pipe and temperature compensation wire to receive the high-temperature gas influence, ensure the two can stable transmission test data.
As a further description of the present invention, preferably, the copper tube and the temperature compensation wire both extend out of the main frame body from the bottom of the wire passage.
By adopting the technical scheme, the copper tube and the temperature compensation wire are led out from the same port, so that the copper tube and the temperature compensation wire are conveniently connected into a testing instrument, the identification and the sorting are convenient, the influence of the high temperature of the heating surface of the bent frame is avoided, and the stability of data transmission is further ensured.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
according to the invention, the bent frame made of the high-temperature-resistant alloy material is adopted, and the water cooling channels are uniformly arranged on the windward side and the side wall surface of the bent frame, so that the use requirement of the bent frame material is reduced, the processing cost is reduced, the temperature of the bent frame is effectively reduced, the bent frame is prevented from being ablated in a high-temperature flow field, the temperature in the channel is reduced to be within the bearing range of a thermocouple wire, and the realization of total temperature measurement is ensured; and the total temperature probe and the total pressure probe can be mixed and distributed, so that the total temperature and the total pressure signals of the flow field can be obtained simultaneously in one test, and the test efficiency is improved.
Drawings
FIG. 1 is a rear view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of the present invention;
FIG. 3 is an enlarged view of B in FIG. 2;
fig. 4 is a cross-sectional view of the main frame body and windward plate of the present invention.
In the figure: 1. a main frame body; 11. a wire passage; 12. a compression nut; 13. a side water channel; 2. a windward plate; 21. a front water channel; 3. a pitot pressure probe; 4. a total temperature probe; 5. a water pipe; 51. a water inlet pipe; 52. a water outlet pipe; 6. a triangular support frame; 7. connecting a support rod; 71. a connecting nut; 8. and (7) a gasket.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The utility model provides a whole water-cooling framed bent in high temperature flow field, combines fig. 2, fig. 3, including the body frame body 1, windward plate 2, skin support pressure probe 3, total temperature probe 4, water pipe 5, triangular supports frame 6 and connecting branch 7, windward plate 2 links firmly in body frame body 1 front side, and triangular supports frame 6 links firmly in body frame body 1 rear side with connecting branch 7, and a plurality of skin support pressure probe 3 and the total temperature probe 4 interval of a plurality of link firmly on windward plate 2, and water pipe 5 erects in body frame body 1 bottom.
With reference to fig. 1 and 2, the main frame body 1 is a square plate-shaped cavity shell, the windward plate 2 is a square rod, the front end surface of the windward plate 2 is an arc surface and is pyramid-shaped, the front end surface of the windward plate 2 is a windward surface, and the rear end surface of the windward plate 2 is a plane and is welded with the main frame body 1; referring to fig. 4, the two sides of the main frame body 1 and the front end surface of the windward plate 2 are respectively provided with a side water channel 13 and a front water channel 21, the water pipe 5 comprises a water inlet pipe 51 and a water outlet pipe 52, the water inlet pipe 51 and the water outlet pipe 52 are respectively fixedly connected to the bottoms of the two sides of the main frame body 1, and a high-pressure cooling water rubber hose is convenient to install; the water inlet pipe 51 is communicated with the bottom of the side water channel 13 on the left side of the main frame body 1, the top of the side water channel 13 on the left side of the main frame body 1 is respectively communicated with the top of the front water channel 21 and the top of the side water channel 13 on the right side of the main frame body 1, and the bottom of the front water channel 21 and the bottom of the side water channel 13 on the right side of the main frame body 1 are communicated.
With reference to fig. 3 and 4, the side water channel 13 is a square hole channel, the front water channel 32 is a cylindrical hole channel, the side water channel 13 and the front water channel 21 are respectively formed in a grooving and punching manner, and the side water channel 13 is formed into the square hole channel, so that the flow rate of cooling water in unit time can be increased to the maximum extent, and more cooling water can flow into the main frame body 1, so as to increase the cooling efficiency; meanwhile, the front water channel 21 is set to be a cylindrical hole channel, so that the windward plate 2 can have good structural strength and is prevented from being deformed by heating; in order to avoid flow field blockage, the size of the high-temperature flow field measurement water-cooling bent frame is limited, the flow field blockage degree is usually not more than 8%, and the width of the main frame body 1 and the windward plate 2 is not more than 40mm in consideration of the influence of the boundary layer; meanwhile, the width of the side water channel 13 is between 2mm and 3mm, the caliber of the front water channel is also between 2mm and 3mm, the aperture of the side water channel 13 is the same as that of the front water channel 21, a dead water area can be avoided, and cooling water can stably and smoothly circulate in the side water channel 13 and the front water channel 21.
Referring to fig. 2 and 4, the high-speed gas is heated to a higher temperature in the heater, and accelerated to a speed required by a test through the nozzle, a stable flow field is formed in a wind tunnel test section, when the gas flows through the bent from the probe direction, the flow speed is rapidly reduced after shock waves, the temperature is increased, and the local temperature may reach the total temperature, at this time, cooling water is introduced into the water inlet pipe 51, so that the cooling water firstly flows upwards, then flows downwards through the side water channel 13 and the front water channel 21, and finally flows out from the water outlet pipe 52, a large amount of heat energy is taken away by the flow of the water, so as to play a cooling role, and meanwhile, the cooling water firstly flows in from one side of the main frame body 1 and then flows into the windward plate 2, so that the problem that the side wall of the main frame 1 cannot be effectively cooled when the cooling water directly flows in from the windward plate 2 and then flows out from one channel is solved, the windward plate 2 and the main frame body 1 can be cooled by cooling water at the same time, so that the cooling water can absorb heat to the maximum extent, and the bent frame is effectively prevented from being ablated by high temperature; the windward side is set to be an arc surface, so that hot gas can be effectively shunted, the heating area of the bent frame is increased, the surface temperature of the bent frame can be reduced in a short time by matching with the flow of cooling water, and the bent frame can be uniformly cooled due to the large heating area, so that the problem of deformation caused by large local temperature difference is avoided.
With reference to fig. 2 and 3, a plurality of T-shaped cylindrical grooves are formed in the rear end face of the windward plate 2 at intervals along the vertical direction, the pitot pressure probe 3 and the total temperature probe 4 are inserted into the T-shaped cylindrical grooves, the front ends of the pitot pressure probe 3 and the total temperature probe 4 extend out of the windward plate 2, protruding rings are arranged at the tails of the pitot pressure probe 3 and the total temperature probe 4, the outer diameters of the rings are the same as the maximum outer diameter of the cylindrical grooves, the pitot pressure probe 3 and the total temperature probe 4 are buckled in the cylindrical grooves through the rings to prevent the pitot pressure probe 3 and the total temperature probe 4 from slipping out of the windward plate 2, a compression nut 12 is connected to the T-shaped cylindrical grooves through internal threads, the compression nut 12 is abutted to one end face, far away from the T-shaped cylindrical grooves, of the rings, and the pitot pressure probe 3 and the; the equal butt of the terminal surface that gland nut 12 was kept away from to the ring has gasket 8, gasket 8 with T shape cylinder groove butt, gasket 8 adopt red copper material to make, set up in gasket 8 can avoid high-temperature gas to flow into the framed bent, and improve the high temperature resistance and the compressive property of skin support pressure probe 3 and total temperature probe 4 in cylinder groove department.
With reference to fig. 2 and 3, the windward plate 2 is provided with the cylindrical grooves, so that the pitot pressure probe 3 and the total temperature probe 4 have the same interface form and good interchangeability, parameters of different flow fields can be measured by using the bent, and the positions and the number of the pitot pressure probe 3 and the total temperature probe 4 can be adjusted according to the obtained weight of the flow field parameters and the needs; for example, in order to obtain detailed data and boundaries of the temperature field, the total temperature probe 4 may be arranged entirely on the windward plate 2; in order to acquire detailed data and boundaries of the speed field, pitot pressure probes 3 can be arranged on the windward plate 2; in order to check the flow field, the total temperature probes 4 and the pitot pressure probes 3 can be arranged in a crossed mode, and the check of the temperature field and the speed field is completed through one-time test, so that one set of bent frame meets two requirements of temperature measurement and pressure measurement, and the production cost of additional bent frames is saved.
Referring to fig. 2 and 3, the tail of the pitot pressure probe 3 is connected with a copper tube, the tail of the total temperature probe 4 is connected with a temperature compensation wire, a wire channel 11 is arranged between the main frame body 1 and the windward plate 2, the copper tube and the temperature compensation conducting wire extend into the conducting wire channel 11, the copper tube and the temperature compensation conducting wire extend out of the main frame body 1 from the bottom of the conducting wire channel 11, the conducting wire channel 11 is arranged to receive and release the copper tube and the temperature compensation conducting wire, meanwhile, the temperature in the lead channel 11 can not exceed 500K by matching with the cooling of cooling water, the red copper tube and the temperature compensation lead are prevented from being influenced by high-temperature gas, the stable transmission of test data by the red copper tube and the temperature compensation lead is ensured, the copper tube and the temperature compensation lead are led out from the same port, so that the copper tube and the temperature compensation lead are conveniently connected into a testing instrument and are conveniently identified and sorted, and the influence of the high temperature of the heating surface of the bent frame is avoided, and the stability of data transmission is further ensured.
With reference to fig. 1 and 2, the triangular support frame 6 is fixedly connected to the tail of the main frame body 1 through bolts, and one end of the connecting strut 7 is fixedly connected to the triangular support frame 6 through a connecting nut 71 after penetrating through the triangular support frame 6, so that the bent can be installed and stably supported; the main frame body 1 and the windward plate 2 are made of 06Cr25Ni20 materials, the triangular support frame 6 and the connecting support rod 7 are made of 30CrMnSiA materials, the bent frame is enabled to have extremely high temperature resistance, so that the bent frame is guaranteed not to generate the risk of ablation when the cooling water cooling effect is weakened, and the service life of the bent frame is prolonged.
In summary, when the water-cooled bent frame for measuring the high-temperature flow field works, in order to avoid the bent frame from being ablated, on one hand, the bent frame is made of high-temperature alloy materials, and the windward side of the bent frame is machined into a round angle, on the other hand, the bent frame is filled with water, the temperature of the bent frame is reduced, the bent frame is prevented from being ablated in the high-temperature flow field, the temperature in a channel is ensured to be reduced to be within the bearing range of a thermocouple wire, meanwhile, a skin-support pressure probe 1 and a total temperature probe 10 transmit skin-support pressure signals and total temperature signals sensed at the head part of the bent frame to a copper tube or a temperature compensation wire, the copper tube or the temperature compensation wire passes through the bent frame channel, and data are collected outside a flow field led out of the tail part of the bent frame through a test instrument and a.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a whole water-cooling framed bent in high temperature flow field which characterized in that: comprises a main frame body (1), a windward plate (2), a leather support pressure probe (3), a total temperature probe (4), a water pipe (5), a triangular support frame (6) and a connecting support rod (7), the windward plate (2) is fixedly connected to one side of the main frame body (1), the triangular support frame (6) and the connecting support rod (7) are fixedly connected to the other side of the main frame body (1), the plurality of leather support pressure probes (3) and the plurality of total temperature probes (4) are fixedly connected to the windward plate (2) at intervals, the water pipe (5) is erected at the bottom of the main frame body (1), side water channels (13) and front water channels (21) are respectively arranged in the two sides of the main frame body (1) and the front end face of the windward plate (2), the width of each side water channel (13) is 2-3 mm, the caliber of each front water channel (21) is 2-3 mm, each side water channel (13) is a square hole channel, each front water channel (21) is a cylindrical hole channel, and the side water channels (13) and the front water channels (21) are respectively formed; the water pipe (5) comprises a water inlet pipe (51) and a water outlet pipe (52), the water inlet pipe (51) is communicated with the bottom of the side water channel (13) on one side of the main frame body (1), the top of the side water channel (13) on one side of the main frame body (1) is respectively communicated with the top of the front water channel (21) and the top of the side water channel (13) on the other side of the main frame body (1), and the bottom of the front water channel (21) and the bottom of the side water channel (13) on the other side of the main frame body (1) are communicated with the water.
2. The whole-course water-cooling bent frame for the high-temperature flow field according to claim 1, characterized in that: the front end surface of the windward plate (2) is a circular arc surface and is pyramid-shaped.
3. The whole-course water-cooling bent frame for the high-temperature flow field according to claim 1, characterized in that: a plurality of T-shaped cylindrical grooves are formed in the rear end face of the windward plate (2), the leather support pressure probe (3) and the total temperature probe (4) are all inserted into the T-shaped cylindrical grooves, a compression nut (12) is connected to the T-shaped cylindrical grooves in an internal thread mode, and the compression nut (12) is abutted to one end face, away from the T-shaped cylindrical grooves, of the leather support pressure probe (3) and the total temperature probe (4).
4. The whole-course water-cooling bent frame for the high-temperature flow field according to claim 3, characterized in that: a gasket (8) is abutted to one end face, far away from the compression nut (12), of the pitot pressure probe (3) and the total temperature probe (4), the gasket (8) is abutted to the T-shaped cylindrical groove, and the gasket (8) is made of red copper materials.
5. The whole-course water-cooling bent frame for the high-temperature flow field according to claim 1, characterized in that: the main frame body (1) and the windward plate (2) are made of 06Cr25Ni20 materials, and the triangular support frame (6) and the connecting support rod (7) are made of 30CrMnSiA materials.
6. The whole-course water-cooling bent frame for the high-temperature flow field according to claim 5, characterized in that: the width of the main frame body (1) is less than or equal to 40 mm.
7. The whole-course water-cooling bent frame for the high-temperature flow field according to claim 1, characterized in that: a copper tube is connected to the skin support pressure probe (3), a temperature compensation wire is connected to the total temperature probe (4), a wire channel (11) is arranged between the main frame body (1) and the windward plate (2), and the copper tube and the temperature compensation wire extend into the wire channel (11).
8. The high-temperature flow field full-process water-cooling bent frame according to claim 7, characterized in that: the copper tube and the temperature compensation lead extend out of the main frame body (1) from the bottom of the lead channel (11).
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| CN111982457A (en) * | 2020-08-14 | 2020-11-24 | 西安航天动力研究所 | Mach number measuring device under high temperature supersonic flow field environment |
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| CN112213069B (en) * | 2020-10-12 | 2022-06-10 | 中国空气动力研究与发展中心超高速空气动力研究所 | Flow field calibration and measurement bent frame with cooling structure for hypersonic high-temperature wind tunnel |
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| CN112985751B (en) * | 2021-02-01 | 2022-09-23 | 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 stable section total temperature and total pressure test bent frame structure and manufacturing method |
| CN112924136B (en) * | 2021-03-12 | 2022-05-06 | 中国空气动力研究与发展中心超高速空气动力研究所 | Device and method for measuring average speed of wind tunnel test airflow |
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