Capacitance based mass metering for cryogenic fluids
Abbreviated Journal Title
hydrogen; nitrogen; oxygen; dielectric properties; instrumentation; Thermodynamics; Physics, Applied
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.
"Capacitance based mass metering for cryogenic fluids" (2003). Faculty Bibliography 2000s. 3950.