Liquid volume measurement for cryogen under microgravity condition

被引:9
|
作者
Nishizu, Takahisa [1 ]
Torikata, Yasuo
Yamashita, Tomoki
Sakamoto, Tadaaki
Futaya, Yuka
Tateno, Akiko
Nakano, Akihiro
机构
[1] Kyoto Univ, Grad Sch Agr, Sakyo Ku, Kyoto 6068502, Japan
[2] Mayekawa MFG Co Ltd, Ibaraki 3020118, Japan
[3] Univ Tsukuba, Grad Sch Syst & Informat Engn, Tsukuba, Ibaraki 3050006, Japan
[4] JECC TORISHA Co Ltd, Kawagoe, Saitama 3050833, Japan
[5] Natl Inst Adv Ind Sci & Technol, Enery Technol Res Inst, Tsukuba, Ibaraki 3058564, Japan
关键词
Resonant Frequency; Microgravity Condition; Parabolic Flight; Helmholtz Resonator; Volume Prediction;
D O I
10.1007/BF02870407
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
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 micro-gravity 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 micro-gravity conditions agree with the data obtained under normal gravity conditions.
引用
收藏
页码:190 / 195
页数:6
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