A hypersonic wind tunnel vacuum pressure intake pressure regulation method
A technology of vacuum pressure and hypersonic speed, which is applied in aerodynamic testing, testing of machine/structural components, instruments, etc. It can solve problems such as the inability to obtain the target test parameter state, the difficulty of complex design of the intake system, and the slow speed of pressure adjustment. , to achieve the effect of prolonging the stable test time, reducing the difficulty of design, and speeding up the pressure adjustment
Active Publication Date: 2022-01-04
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology
[0003] The technical problem solved by the present invention is: in view of the current existing technology, the traditional wind tunnel system vacuum pressure intake pressure adjustment method has poor pressure adjustment accuracy, cannot obtain the target test parameter state, slow pressure adjustment speed, and complex design of the intake system For a difficult problem, a hypersonic wind tunnel vacuum pressure intake pressure regulation method is proposed
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[0025] A hypersonic wind tunnel vacuum pressure intake pressure regulation method, through the simulated wind tunnel test to obtain the functional relationship of the required parameters in advance, and calculate the valve opening and single-stage medium pressure required in the test process according to the data required for the actual test The target pressure value of the pressure regulating valve finally completes the configuration process of the wind tunnel test, such as figure 2 As shown, the specific steps are:
[0026] (1) According to the Mach number Ma, the simulated height H, and the simulated Reynolds number Re required by the wind tunnel test, the target total pressure P of the antechamber is calculated by the relevant formula of fluid mechanics 0 , according to the one-dimensional isentropic flow, calculate the air flow rate flowing through the wind tunnel nozzle:
[0027]
[0028] In the formula, C is a constant, for air γ=1.4, P 0 is the total anterior cha...
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A hypersonic wind tunnel vacuum pressure intake pressure adjustment method, which realizes the medium pressure intake adjustment system under the single-stage pressure regulator valve, realizes wide-range high-precision pressure adjustment control, fast pressure adjustment speed, and reduces the design cost of the intake system The complexity and design difficulty of the pressure regulating valve improve the flexibility of the single-stage pressure regulating valve, and solve the problem of the poor pressure regulation accuracy of the traditional wind tunnel system vacuum pressure inlet pressure regulation method, and the inability to obtain the target test parameter state, pressure The problem of slow adjustment speed and high difficulty in the design of the intake system complexity, the method flow is clear, and the structure of the pressure regulation system is stable.
Description
technical field [0001] The invention relates to a hypersonic wind tunnel vacuum pressure inlet pressure regulating method, which belongs to the field of hypersonic wind tunnel design and flow field control. Background technique [0002] A wind tunnel is a pipe-shaped test device that can artificially generate and control airflow to simulate the flow of air around an aircraft or object, and measure the effect of airflow on an object. Aerodynamic ground simulation equipment such as wind tunnels plays a very important role in the research of aerodynamics and the design of various aerospace vehicles. For aerospace ground aerodynamic test equipment such as hypersonic wind tunnels and engine test benches, when simulating high-altitude flight conditions, in order to simulate airflow conditions at high altitudes, it is necessary to form a certain vacuum environment in the wind tunnel test section, and at the same time meet the requirements of the wind tunnel. The requirement of hyp...
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IPC IPC(8): G01M9/06
CPCG01M9/065
Inventor 马利川赵佳祥晏硕石运军黄炳修李玉秋孙涛
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS