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A Study on the Chattering under Cryogenic Flow Test of a Oxidizer Shutoff Valve  

Lee, JoongYoup (공급계통팀)
Han, SangYeop (공급계통팀)
Lee, SooYong (발사체엔진실)
Publication Information
Aerospace Engineering and Technology / v.12, no.2, 2013 , pp. 108-117 More about this Journal
Abstract
The oxidizer shutoff valve of a gas generator controls the mass flow rate of the propellant of a rocket engine using pilot pressure and spring the force of the valve. The developing oxidizer shutoff valve can be shut off if the pilot pressure is removed from the actuator. Therefore, force balancing is necessary to analyze the characteristics of the forces with respect to the opening and closing of the valve in order to evaluate its performance. In light of this, the valve has been designed to adjust the control pressure required to open the poppet and to determine the working fluid pressure at which the valve starts to close. Under cryogenic flow test as a tests level of C.R.T(Control Random Test), the chattering phenomena occurred due to much leakage of a metal seat section. The pressure for chattering of the oxidizer valve is predicted at about 11 bar using force balancing analysis.
Keywords
Oxidizer shutoff valve; Chattering; Force balance; Leakage;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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