著者

小林 弘明 吹場 活佳 本郷 素行 佐藤 哲也 溝端 一秀

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会論文集 (ISSN:13446460)

巻号頁・発行日

vol.55, no.644, pp.418-425, 2007 (Released:2007-10-10)

参考文献数

8

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Experimental studies on telescopic aerospikes for aerodynamic control are reported in this paper. Parametric study on the aerodynamic characteristics of the aerospike has performed including the effect of spike length L, base diameter of tip cone D, spike translating speed and direction. The Axial force coefficient Ca of the aerospike suddenly increases at L/D=3.0 due to flow mode transition from the separation to the reattachment. Reattachment/separation flow mode transition phenomenon can be applicable to a newly invented aerodynamic control device, which is called air-breathing aerospike. In this paper, verification test results of this air-breathing aerospike are also reported. A small solenoid valve in the body cylinder successfully controls reattachment/separation flow mode transition at the angle of attacks from 0 to 12 degree. The spiked bodies’ Ca varies according to the mode transition. As a result, we can control the aerodynamic property of the spiked body by opening/closing the valves periodically.

著者

中野 良子 中谷 淳 溝端 一秀 杉山 弘

出版者

一般社団法人 日本機械学会

雑誌

北海道支部講演会講演概要集

巻号頁・発行日

vol.2001, pp.234-235, 2001

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It has been recently found that Europa, the second satellite of Jupiter, has warm water under its icy surface. Biological explorations are needed so as to investigate the existence of life on Europa and to clarify the origin of life on the Earth. A preliminary analysis is carried out on flight trajectories from the Earth to Jupiter and on the feasibility of aerobraking in Jovian atmosphere for deploying a satellite around Europa. Several interplanetary orbits from the Earth to Jupiter are calculated and that having the smallest Jovian insertion energy is selected. It is clearly shown that aerobraking is by far more advantageous for reduction of satellite weight than retrofiring of rocket motors.