Premixing gas supply device for shock tube and premixing gas supply method thereof
A gas supply device and shock tube technology, applied in the field of shock tubes, can solve problems such as reducing test efficiency
Inactive Publication Date: 2021-07-06
中国空气动力研究与发展中心超高速空气动力研究所
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Problems solved by technology
Even, if the adjustment of the inflation ratio is too large, the existing air supply source cannot meet the demand, and the nozzle throat has to be replaced, which reduces the test efficiency
Method used
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Embodiment 1
[0033] Such as figure 1 As shown, this embodiment has four gas branches A, B, C, and D, and the gas source pressure gauge 2, pressure reducing valve 4, working pressure gauge 3 and flow meter 5 connected in sequence to each branch together form a flow control System 10.
[0034] The working process of this embodiment is as follows:
[0035] Close the stop valves 7 of the A, B, C, and D gas branches respectively.
[0036] Before inflating, first adjust the gas flow rate of the A gas branch, open the gas source 1 of the A gas branch, and read the gas supply pressure of the gas source 1 through the gas source pressure gauge 2. Secondly, adjust the inlet pressure of the flowmeter 5 by adjusting the pressure reducing valve 4, the working pressure gauge 3 displays the inlet pressure of the flowmeter 5, when the inlet pressure of the flowmeter 5 reaches the preset value, the gas flow of the A gas branch meets the demand . Finally, adjust the gas flow of B, C, and D gas branches i...
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The invention discloses a premixing gas supply device for a shock tube and a premixing gas supply method of the premixing gas supply device. The premixing gas supply device comprises a plurality of gas branches which are connected in parallel, wherein each gas branch is sequentially connected with a gas source, a gas source pressure gauge, a pressure reducing valve, a working pressure gauge, a flow meter, a one-way valve and a stop valve through gas pipes from front to back and is finally connected to gas inlet holes which are uniformly distributed on the same section of a shock tube body through pipelines. The premixing gas supply method comprises the following steps: firstly, determining the pressure ratio of each component in mixed gas; secondly, adjusting pressure reducing valves of all the gas branches respectively, and controlling the gas flow of all the gas branches flowing through the flow meter; then, opening the stop valves of the gas branches at the same time, and filling the shock tube body with gas of the gas branches at the same time; and finally, closing the stop valves of the gas branches at the same time, and completing gas filling. The premixing gas supply device and the premixing gas supply method are based on the flow meter, are suitable for a wider gas source pressure fluctuation range, are good in safety, are simple and convenient in control method, and can meet the requirements of various types of tests.
Description
technical field [0001] The invention belongs to the technical field of shock tubes, and in particular relates to a premixed gas supply device for shock tubes and a premixed gas supply method thereof. Background technique [0002] The shock tube is a test device that generates high temperature and high pressure airflow. Because the shock tube can easily heat, pressurize and accelerate the gas to a very high parameter, it is widely used in aerospace, aviation, explosion engineering, chemistry and physics and other fields. [0003] According to different test requirements, premixed gas or test gas needs to be filled into the shock tube body. Conventional gas premixing generally controls gas components through gas partial pressure and molecular thermal motion to achieve mutual mixing of gas components, while the shock tube body is a slender tube body, and there is a gas component ratio control in this premixing method The precision is low, gas mixing takes a long time and it i...
Claims
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IPC IPC(8): G01M9/00
CPCG01M9/00
Inventor 李贤孔小平廖振洋钟涌杨陈栋黄成扬常雨
Owner 中国空气动力研究与发展中心超高速空气动力研究所