著者

辛島 桂一 佐藤 清 森戸 俊樹

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.41, no.468, pp.35-43, 1993

被引用文献数

2 1

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This paper concerns with the results of an experimental study on dynamic load characteristics in parachute inflation at a subsonic speed. The unsteady drag of the parachutes in the process of inflation is measured in a wind tunnel at <i>M</i>=0.2, and the opening shock load is examined in detail with emphasis on the effects of porosity and size of the models. It is shown that the circular vents near the edge of the canopy are more effective than the slit vents to reduce the opening shock load without considerable decrease of drag in the steady-state. Detailed examination reveals that the model geometry as well as descending speeds has no serious influence on the coefficients of the opening shock load <i>C</i>_m and the opening time <i>C</i>_t, if both <i>C</i>_m and <i>C</i>_t are defined by use of the effective references calculated from the concept of an equivalent parachute, which has a circular plane canopy with the reduced area obtainable by subtracting porous area from the geometric one.

著者

河内山 治朗 高塚 均 布野 泰広 正岡 義彦 高野 純 石川 吉郎 森戸 俊樹 泉 達司 若松 逸雄 松田 昌三 Kochiyama Jiro Takatsuka Hitoshi Funo Yasuhiro Masaoka Yoshihiko Takano Jun Ishikawa Yoshiro Morito Toshiki Izumi Tatsushi Wakamatsu Itsuo Matsuda Masami

出版者

航空宇宙技術研究所

雑誌

航空宇宙技術研究所特別資料 = Special Publication of National Aerospace Laboratory (ISSN:0289260X)

巻号頁・発行日

vol.32, pp.10-16, 1996-09

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24-25 Jul. 1996