A Helmholtz resonance technique was employed as an effective technique for measuring volumes of cryogenic propellants in orbit. A closed-type resonator was developed and experiments that measured the volume of liquid nitrogen in microgravity conditions during parabolic flights were conducted. A loudspeaker installed in the resonator was driven by a swept sound from 249.5 to 649.5 Hz, and the response of the electrical impedance was analyzed by the maximum entropy method to determine the resonant frequency every 743 ms. The resonant frequencies obtained under the microgravity conditions agree with the data obtained under normal gravity conditions.
Liquid volume measurement for cryogen under microgravity condition
Messung des flüssigen Volumens von Cryogen und Mikrogravitätsbedingungen
2006
6 Seiten, 5 Bilder, 1 Tabelle, 11 Quellen
Conference paper
English
Raumfahrttechnik , Raketenantrieb , Treibstoff , Tieftemperaturtechnik , Kryogenspeicherung , Volumenmessung , Satellitenbahn , Resonanzverfahren , Flüssigstickstoff , Mikrogravität , Lautsprecher , elektrische Impedanz , Resonanzfrequenz , Vergleichsmessung , Gravitation , Resonator , Verlustenergie , flüssiger Stickstoff
Midcourse Space Experiment Contamination Measurement During Cryogen Phase
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