CN111169656B - Convective cooling heat transfer test device - Google Patents
Convective cooling heat transfer test device Download PDFInfo
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- CN111169656B CN111169656B CN202010016168.7A CN202010016168A CN111169656B CN 111169656 B CN111169656 B CN 111169656B CN 202010016168 A CN202010016168 A CN 202010016168A CN 111169656 B CN111169656 B CN 111169656B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
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- Aviation & Aerospace Engineering (AREA)
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Abstract
The invention discloses a convective cooling heat transfer test device, a heating system of which adopts a quartz lamp heater, the measuring system comprises a gas proportional valve, a gas flowmeter, a heating controller, a temperature measuring meter and a test piece, the cooling system comprises an air source, an air path hose, an air flow rectifying device and an air flow transition device, the supporting system comprises an air path fixing device and a test piece heat insulation device, the test piece and the test piece heat insulation device are arranged in the air flow transition device, the test piece heat insulation device is arranged on the left side and the right side of the lower bottom surface of the test piece, the quartz lamp heater is arranged on the upper top surface of the air flow transition device at a position corresponding to the test piece, the cold air sequentially enters the inside of the test piece positioned in the air flow transition device through the air proportional valve, the air flow meter and the air flow rectifying device, so that the convective cooling of the test piece is realized. The invention has the advantages of simple components, simple and convenient operation, low cost, small external interference and reliable test result.
Description
Technical Field
The invention relates to the field of test devices, in particular to a convective cooling heat exchange test device.
Background
Various structural components used in aviation and aerospace need to satisfy not only a certain rigidity and strength bearing function, but also a good heat dissipation function. The lattice structure is expected to simultaneously meet the heat-proof and bearing functions of the specific structure of the aerospace vehicle. The lattice structure is a new structure appearing in recent years, and research on the flow heat transfer rule of the lattice structure is very limited. Therefore, the heat exchange device is provided, and the research on the heat exchange performance of different lattice structures is of great significance. Convective cooling heat transfer is the most widely used heat transfer method.
Currently, there are few simple and effective devices available to study convective heat transfer. Some existing experimental devices mainly comprise a base, a fan, an airflow pipeline, a heat exchanger and a detection device, the device cannot ensure that airflow forms uniform, stable and uniform airflow before passing through a test piece, and does not carry out heat insulation treatment on the test piece, and experimental data are inaccurate due to the fact that the heat exchanger is diffused and heat transfer problems easily occur.
Disclosure of Invention
The invention aims to provide a convective cooling heat exchange test device, which overcomes the problems of diffusion heat transfer, external environment interference, uneven and unstable air flow and the like of a heat exchanger of the conventional test device and has reliable test results.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a convective cooling heat transfer test device, includes heating system, measurement system, cooling system and braced system, heating system adopts the quartz lamp heater, measurement system includes gaseous proportional valve, gas flowmeter, heating controller, temperature measurement meter and test piece, cooling system includes air supply, gas circuit hose, air current fairing and air current transition device, braced system includes gas circuit fixing device and test piece heat-proof device, and test piece, test piece heat-proof device arrange in the air current transition device, and test piece heat-proof device set up the left and right sides of bottom surface under the test piece, realize the adiabatic processing of bottom surface under the test piece, constitute the cooling surface, and the quartz lamp heater is installed on the last top surface of air current transition device and is located with the corresponding position of test piece for realize the heating of the heating surface of test piece, be equipped with the through-hole that is used for realizing the air current inflow and outflow on the both sides face around the test piece, cold air enters the interior of a test piece positioned in the air flow transition device through the air proportional valve, the air flow meter and the air flow rectifying device in sequence to realize the convection cooling of the test piece, and the temperature measuring meter is installed on the heating surface and the cooling surface of the test piece and used for recording the temperature change of the heating surface and the cooling surface of the test piece.
Furthermore, the gas proportional valve, the gas flowmeter, the gas flow rectifying device and the gas flow transition device are sequentially connected through a gas path hose, and the gas path hose is fixedly supported through a gas path fixing device.
Further, a gas proportional valve and a gas flowmeter are used for realizing quantitative control of the cold air intake speed and flow.
Furthermore, the heating controller adopts a constant temperature controller, so that the heating temperature of the test piece is ensured to be constant.
Furthermore, the heat insulation device of the test piece adopts heat insulation cotton or heat insulation boards.
Furthermore, the air flow transition device requires that the peripheral wall surfaces are smooth, so that disturbance is not generated on the flow of the air as much as possible, and the air enters the inside of the test piece in a laminar flow state
The invention has the following beneficial effects:
this testing device is the first device that can be used for carrying on lattice structure initiative cooling heat transfer performance experiment in China, and it can be used to accomplish the convection cooling heat transfer test of different air velocities, different lattice structure test pieces, through the contrast analysis test result, guides design and the engineering application of accomplishing the initiative cooling lattice structure, simple structure, and easily operation has overcome current experimental apparatus heat exchanger diffusion heat transfer problem, external environment interference problem, the inhomogeneous unstability of air current scheduling problem, and the experimental result is reliable. The airflow rectifying device and the airflow transition device of the cooling system can keep the laminar flow state before the air enters the test piece as much as possible; carrying out heat insulation treatment on the cooling surface of the test piece by using a heat insulation material to eliminate external environment interference; the heating system adopts a quartz lamp heating system with small thermal inertia and high control precision, can ensure stable and uniform heating of the test piece, and the constant temperature controller of the measuring system can ensure constant heating temperature of the test piece.
Drawings
Fig. 1 is a schematic overall structure diagram of a convective cooling heat transfer test apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic partial structure diagram of a convective cooling heat transfer test apparatus according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in detail below with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-2, an embodiment of the present invention provides a convective cooling heat transfer test apparatus, which includes a heating system, a measurement system, a cooling system, and a support system, wherein the heating system employs a quartz lamp heater 1, the measurement system includes a gas proportional valve 2, a gas flowmeter 3, a heating controller, a temperature measuring meter, and a test piece 4, the cooling system includes a gas source, a gas path hose 5, a gas flow rectifying apparatus 8, and a gas flow transition apparatus 6, the support system includes a gas path fixing apparatus 7 and a test piece heat insulation apparatus, the test piece 4 and the test piece heat insulation apparatus are disposed in the gas flow transition apparatus 6, the test piece heat insulation apparatus is disposed on the left and right sides of the lower bottom surface of the test piece 4 to implement heat insulation treatment of the lower bottom surface of the test piece to form a cooling surface, the quartz lamp heater 1 is mounted on the upper top surface of the gas flow transition apparatus 6 at a position corresponding to the test piece, a heating for realizing the heating surface of test piece, heating controller adopts thermostatic control ware, guarantee the heating temperature of test piece invariable, be equipped with the through-hole that is used for realizing the air current inflow and outflow on the both sides face around the test piece, gas proportional valve 2, gas flowmeter 3, the air current fairing, air current transition device 6 links to each other through air circuit hose 5 in proper order, air circuit hose 5 realizes the fixed stay through air circuit fixing device 7, cold air passes through gas proportional valve 2 in proper order, gas flowmeter 3, the inside that the air current fairing got into the test piece that is located air current transition device 6, realize the convection cooling of test piece, install on the heating surface and the cooling surface of test piece, a temperature variation for recording the heating surface and the cooling surface of test piece, gas proportional valve 2, gas flowmeter 3 is used for realizing cold air admission speed, the quantitative control of flow.
In this embodiment, the heat-insulating device of the test piece adopts heat-insulating cotton or heat-insulating board, adopts the heat-insulating device to carry out adiabatic processing to the test piece left and right sides in the test process, can select to adopt adiabatic processing or not carry out adiabatic processing to the bottom surface down, and it is two kinds of different boundary conditions, when arranging, places thermal-insulating cotton or heat-insulating board in the test piece left and right sides and bottom surface and makes to accomplish isolated external and the inside heat exchange of test piece under the condition that does not influence inside flow field. The air flow transition device 6 requires that the peripheral wall surfaces are smooth, so that disturbance on the flow of air is avoided as much as possible, and the air enters the test piece in a laminar flow state.
When the test is implemented, a quartz lamp heater is adopted to heat the heating surface of a test piece by heat flow, a heating controller ensures constant heating temperature, the other surface of the test piece is not heated and is subjected to or not subjected to heat insulation treatment (as two different boundary conditions in the test), the surface is called a cooling surface, the left side and the right side are subjected to heat insulation treatment to avoid the influence of the external environment on the test result, the front surface and the back surface are used for inflow and outflow of air, cold air enters from an air source and an air path hose, the air inlet speed and the flow are quantitatively regulated through an air proportional valve and an air flow meter, the cold air can enter into an internal structure area of the test piece at a stable and uniform flow speed through an air flow rectifying device, the cold air is subjected to sufficient heat exchange with the test piece in the process of flowing through the inside of the test piece to take away the heat of the test piece, and the convective cooling of the test piece is realized, temperature measuring equipment is installed on the heating surface and the cooling surface of the test piece, the temperature change conditions of the cooling surface under working conditions of different test pieces, different flow rates and the like are recorded, and the convection exchange cooling effect is analyzed. In the whole test process, the left side and the right side of the test piece are isolated from the surrounding environment by adopting the heat insulation devices, the influence of the surrounding environment on the test result is eliminated, and the heat convection test result is true and reliable.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (6)
1. The utility model provides a convective cooling heat transfer test device, includes heating system, measurement system, cooling system and braced system, its characterized in that: the heating system adopts a quartz lamp heater (1), the measuring system comprises a gas proportional valve (2), a gas flowmeter (3), a heating controller, a temperature measuring meter and a test piece (4), the cooling system comprises a gas source, a gas path hose (5), an air flow rectifying device (8) and an air flow transition device (6), the supporting system comprises a gas path fixing device (7) and a test piece heat insulation device, the test piece (4) and the test piece heat insulation device are arranged in the air flow transition device (6), the test piece heat insulation device is arranged on the left side, the right side and the lower bottom of the test piece (4) to realize heat insulation treatment of the lower bottom of the test piece to form a cooling surface, the quartz lamp heater (1) is arranged on the upper top surface of the air flow transition device (6) and at a position corresponding to the test piece to realize heating of the heating surface of the test piece, through holes for realizing air inflow and outflow are arranged on the front and back of two side surfaces of the test piece, cold air enters the interior of a test piece positioned in the air flow transition device (6) through the air proportional valve (2), the air flow meter (3) and the air flow rectifying device (8) in sequence to realize the convection cooling of the test piece, and the temperature measuring meter is installed on the heating surface and the cooling surface of the test piece and used for recording the temperature change of the heating surface and the cooling surface of the test piece.
2. The convective cooling heat transfer test device of claim 1, wherein: the gas proportional valve (2), the gas flowmeter (3), the gas flow rectifying device and the gas flow transition device (6) are sequentially connected through the gas path hose (5), and the gas path hose (5) is fixedly supported through the gas path fixing device (7).
3. The convective cooling heat transfer test device of claim 1, wherein: the gas proportional valve (2) and the gas flowmeter (3) are used for realizing quantitative control of the cold air intake speed and flow.
4. The convective cooling heat transfer test device of claim 1, wherein: the heating controller adopts a constant temperature controller, and the heating temperature of the test piece is ensured to be constant.
5. The convective cooling heat transfer test device of claim 1, wherein: the heat insulation device of the test piece adopts heat insulation cotton or a heat insulation plate.
6. The convective cooling heat transfer test device of claim 1, wherein: the air flow transition device (6) requires smooth wall surfaces around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016168.7A CN111169656B (en) | 2020-01-07 | 2020-01-07 | Convective cooling heat transfer test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016168.7A CN111169656B (en) | 2020-01-07 | 2020-01-07 | Convective cooling heat transfer test device |
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| CN111169656A CN111169656A (en) | 2020-05-19 |
| CN111169656B true CN111169656B (en) | 2022-07-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3387335B2 (en) * | 1995-10-24 | 2003-03-17 | 株式会社豊田中央研究所 | Thermal fatigue test apparatus and thermal fatigue test method |
| CN201945567U (en) * | 2010-12-14 | 2011-08-24 | 哈尔滨工程大学 | Multi-functional wide-flowing path one-phase heat convection testing apparatus |
| CN102081060B (en) * | 2010-12-14 | 2012-07-11 | 哈尔滨工程大学 | Multifunctional wide flow single-phase convective heat exchange test device |
| CN204368446U (en) * | 2014-12-26 | 2015-06-03 | 北京强度环境研究所 | A kind of to the omnidistance controlled test system of test article surface intensification cooling |
| CN106383022A (en) * | 2016-09-13 | 2017-02-08 | 中国北方发动机研究所(天津) | Multifunctional thermic load fatigue testing system |
| CN108088869B (en) * | 2017-11-30 | 2021-03-09 | 中国航空工业集团公司沈阳飞机设计研究所 | Heat insulation performance test device of thermal protection system |
| CN207703750U (en) * | 2017-12-26 | 2018-08-07 | 中国航天空气动力技术研究院 | Radiant heating-transpiration-cooling test device |
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