대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2001년도 춘계학술대회논문집E
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- Pages.294-298
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- 2001
위성 추진시스템의 추력제어밸브 작동에 따른 추진제 비정상 유동 특성
Transient Flow Behavior of Propellant with Actuation of Thrust Control Valve in Satellite Propulsion System
- 발행 : 2001.06.27
초록
Satellite propulsion system is employed for orbit transfer, orbit correction, and attitude control. The monopropellant feeding system in the low-earth-orbit satellite blowdowns fuel to the thrust chamber. The thrust produced by the thruster depends on fuel amount flowed into the combustion chamber. If the thruster valve be given on-off signal from on-board commander in the satellite, valve will be opened or closed. When the thrusters fire fuel flows through opened thruster valve. Instantaneous stoppage of flow in according to valve actuation produces transient pressure due to pressure wave. This paper describes transient pressure predictions of the KOMPSAT2 propulsion system resulting from latching valve and thrust control valve operations. The time-dependent set of the fluid mass and momentum equations are calculated by Method of Characteristics (MOC).
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