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논문 기본 정보

자료유형
학술저널
저자정보
Seo, Mansu (Cryogenic Engineering Laboratory, Department of Mechanical Engineering, KAIST) Park, Hana (Cryogenic Engineering Laboratory, Department of Mechanical Engineering, KAIST) Yoo, DonGyu (Cryogenic Engineering Laboratory, Department of Mechanical Engineering, KAIST) Jung, Youngsuk (Launcher Systems Development Team, Korea Aerospace Research Institute) Jeong, Sangkwon (Cryogenic Engineering Laboratory, Department of Mechanical Engineering, KAIST)
저널정보
한국초전도저온학회 한국초전도·저온공학회논문지 한국초전도·저온공학회논문지 제16권 제2호
발행연도
2014.1
수록면
64 - 69 (6page)

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Measuring an exact amount of remaining cryogenic liquid propellant under microgravity condition is one of the important issues of rocket vehicle. A Pressure-Volume-Temperature (PVT) gauging method is attractive due to its minimal additional hardware and simple gauging process. In this paper, PVT gauging method using liquid nitrogen is investigated under microgravity condition with parabolic flight. A 9.2 litre metal cryogenic liquid storage tank containing approximately 30% of liquid nitrogen is pressurized by ambient temperature helium gas. During microgravity condition, the inside of the liquid tank becomes near-isothermal condition within 1 K difference indicated by 6 silicon diode sensors vertically distributed in the middle of the liquid tank. Helium injection with higher mass flow rate after 10 seconds of the waiting time results in successful measurements of helium partial pressure in the tank. Average liquid volume measurement error is within 11% of the whole liquid tank volume and standard deviation of errors is 11.9. As a result, the applicability of PVT gauging method to liquid propellant stored in space is proven with good measurement accuracy.

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