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Basic Model for Propellant Tank Ullage Calculation  

Kwon, Oh-Sung (추진제어팀)
Cho, Nam-Kyung (추진제어팀)
Cho, In-Hyun (추진제어팀)
Publication Information
Aerospace Engineering and Technology / v.9, no.1, 2010 , pp. 125-132 More about this Journal
Abstract
Estimation of pressurant mass flowrate and its total mass required to maintain propellant tank pressure during propellant outflow is very important for design of pressurization control system and pressurant storage tank. Especially, more pressurant mass is required to maintain pressure in cryogenic propellant tank, because of reduced specific volume of pressurant due to heat transfer between pressurant and tank wall. So, basic model for propellant tank ullage calculation was proposed to estimate ullage and tank wall temperature distribution, required pressurant mass, and energy distribution of pressurant in ullage. Both test and theoretical analysis have been conducted, but only theoretical modeling method was addressed in this paper.
Keywords
launch vehicle; propulsion; propellant feeding system; pressurizing system; propellant tank; ullage;
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  • Reference
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