Capacitance Based Mass Metering For Cryogenic Fluids
Dielectric properties (C); Hydrogen (B); Instrumentation (D); Nitrogen (B); Oxygen (B)
This paper describes a method for measuring the mass of cryogenic fluids in on-board rocket propellant tanks or ground storage tanks. Linear approximations to the Clausius-Mossotti relationship serve as the foundation for a capacitance based mass sensor, regardless of fluid density stratification or tank shape. Sensor design considerations are presented along with the experimental results for a capacitance based mass gage tested in liquid nitrogen. This test data is shown to be consistent with theory resulting in a demonstrated mass measurement accuracy of ±0.75% and a deviation from linearity of less than ±0.30% of full scale mass. Theoretical accuracies are also shown to be ±0.73% for hydrogen and ±1.39% for oxygen for a select range of pressures and temperatures. Published by Elsevier Ltd.
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Nurge, Mark A.; Youngquist, Robert; and Walters, Deron, "Capacitance Based Mass Metering For Cryogenic Fluids" (2003). Scopus Export 2000s. 1624.