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SA0200031.pdf7.93 MB
titleStudy for Dynamically Unstable Motion of Reentry Capsule
Author(jpn)安部, 隆士; 佐藤, 俊逸; 松川, 豊; 山本, 和志; 平岡, 克巳
Author(eng)Abe, Takashi; Sato, Syunichi; Matsukawa, Yutaka; Yamamoto, Kazushi; Hiraoka, Kazumi
Author Affiliation(jpn)宇宙科学研究所; 宇宙科学研究所; 宇宙科学研究所; 東京大学; 東海大学
Author Affiliation(eng)Institute of Space and Astronautical Science (ISAS); Institute of Space and Astronautical Science (ISAS); Institute of Space and Astronautical Science (ISAS); University of Tokyo; Tokai University
Issue Date2003-03
Publisher宇宙科学研究所
Institute of Space and Astronautical Science
Publication titleThe Institute of Space and Astronautical Science report. S.P.
Aerodynamics, Thermophysics, Thermal Protection, Flight System Analysis and Design of Asteroid Sample Return Capsule
Volume17
Start page301
End page332
Publication date2003-03
Languageeng
AbstractThe dynamic stability of the reentry capsule configuration was investigated both experimentally and numerically. The dynamically unstable behavior was observed especially at transonic regime while, at subsonic regime, an intermittent unstable behavior was observed even though an oscillation amplitude is small compared with the one at transonic regime. At supersonic regime, the dynamically unstable behavior observed at transonic regime disappears. At transonic regime, the limit cycle oscillation was observed as a result of the dynamic instability. The results of both the experiment and the numerical simulation show a reasonable agreement. The dynamic pitching moment during the oscillation was modeled for the front and rear part, separately. It is shown that the pitching moment during the oscillation can be evaluated by considering the dynamic effect on the static aerodynamic characteristics. Based on the modeled pitching moment, a theory for the dynamical instability is proposed, which gives not only the growth rate of the oscillation but also the limit cycle oscillation amplitude. According to the theory, the primary cause for the dynamic instability is the dynamical part of the pitching moment at the rear part of the capsule, which is generated by the vortical flow behind the capsule. The dynamical part of the pitching moment at the front part of the capsule works as a stabilizer. Both the growth rate and the limit cycle oscillation suggested by the theory shows a reasonable agreement with the experiment and the numerical simulation.
Document TypeDepartmental Bulletin Paper
JAXA Category宇宙科学研究所
ISSN0288-433X
NCIDAA10455137
SHI-NOSA0200031000
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/12483


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