Frequency characteristic test system and method of large flow liquid conveying system
A transmission system and frequency characteristic technology, which is applied in the field of frequency characteristic test system of large flow liquid transportation system, can solve the problems of lack of wide frequency range fluid pulsation excitation system and difficulty in simulation
Pending Publication Date: 2018-05-29
XIAN AEROSPACE PROPULSION INST
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Problems solved by technology
[0003] The purpose of the present invention is to solve the lack of a fluid pulsation excitation system suitable for a wide frequency range and high excitation energy in the frequency characteristic test of the existing large-flow liquid delivery system, and the dynamic boundary conditions of the large-flow fluid liquid delivery system on the liquid flow test bench Difficult to simulate and other problems, and provide a large flow liquid delivery system frequency characteristics test system and method
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[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0034] The invention provides a system and method for carrying out frequency characteristic tests on a large-flow liquid delivery system, which is used to study the frequency response characteristics of the propellant liquid delivery system after the rocket engine pump in the medium and high frequency ranges, so as to obtain the acoustic resonance of the liquid delivery system frequency and shape. The invention provides the selection range of the liquid delivery system behind the rocket engine pump, the test flow conditions, the principle of boundary condition simulation, the design of the hydraulic vibration system and the parameters of the conditions, the setting requirements of the pressure accumulator, the layout of the pulsating pressure measuring points, and the test process And the sweep frequency excitation method can co...
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The invention relates to a frequency characteristic test system and method of a large flow liquid conveying system. According to the frequency characteristic test system and method, the problems thatan existing large flow liquid conveying system frequency characteristic test is lack of a flow pulsing excitation system which is suitable for the wide frequency range and has high excitation energy.The frequency characteristic test system comprises a test bed, the liquid conveying system, a hydraulic vibration exciting system, an accumulator and a throttle assembly; the liquid conveying system comprises a main guiding pipe, an oxidizer main valve, a combustion chamber oxidizer head cavity and an injector which are connected sequentially; and the hydraulic vibration exciting system comprisesa first throttle ring and a second throttle ring which are connected to an excitation source pipeline, a by-pass pipeline is arranged between the first throttle ring and the second throttle ring, anda turn-table-type pulsating pressure exiter is arranged on the by-pass pipeline; the test bed and the main guiding pipe are connected through a test bed main pipeline, and the accumulator and the throttle assembly are arranged on the test bed main pipeline; and an outlet of the hydraulic exciting vibration system is connected to the combustion chamber head cavity or the main pipeline of the liquidconveying system.
Description
technical field [0001] The invention relates to the field of liquid rocket engines, in particular to a frequency characteristic test system and method for a large-flow liquid delivery system, which are used to analyze the frequency response characteristics of the liquid delivery system after the pump of the liquid rocket engine. Background technique [0002] The liquid rocket engine propellant liquid delivery system is relatively complex. In engineering practice, it is found that there are many dynamic problems related to the frequency characteristics of the propellant liquid delivery system, such as low-frequency POGO problems, valve automaton oscillation problems, combustion components and liquid The coupling oscillation combustion problem of the delivery system and the dynamic injection characteristics of the injector, if the above problems are studied, it is necessary to carry out dynamic tests in different frequency ranges to study the frequency response characteristics ...
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IPC IPC(8): F02K9/96F02K9/46
CPCF02K9/46F02K9/96
Inventor 刘上张兴军程晓辉陈炜赵瑞国吕鹏翾徐云飞张琳
Owner XIAN AEROSPACE PROPULSION INST