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도정환(Jeonghwan Do),이성민(Seong-Min Lee),전유림(Yurim Jeon),최형준(Hyungjoon Choi),정희원(Heewon Jeong),지상연(Sangyeon Ji),김철웅(Cheulwoong Kim),임석희(Seokhee Lim) 한국추진공학회 2023 한국추진공학회 학술대회논문집 Vol.2023 No.5
In this paper, the configuration of the propulsion system of the vertical take-off and landing demonstrator(VTVL) and the pressure control concept and design method applied to the VTVL are introduced, and the results of the cold flow test using liquid nitrogen are analyzed. The propulsion system of the VTVL uses liquid oxygen and liquid natural gas as propellants, and a gaseous nitrogen pressurization system is applied. When the propellant is supplied, an appropriate amount of pressurized gas is supplied to maintain the pressure in the propellant tank at a certain required pressure. To control the supply rate of pressurized gas, an assembly block composed of solenoid valves and orifices was developed, and its effectiveness was confirmed through analysis of the liquid nitrogen flow test results.