JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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Other TitleFree-fall experiments on a tumbling plate
Author(jpn)川口, 大輔; 山内, 一樹; 舟木, 治郎; 平田, 勝哉
Author(eng)Kawaguchi, Daisuke; Yamauchi, Kazuki; Funaki, Jiro; Hirata, Katsuya
Author Affiliation(jpn)同志社大学理工学部; 同志社大学理工学部; 同志社大学理工学部; 同志社大学理工学部
Author Affiliation(eng)Faculty of Science and Engineering, Doshisha University; Faculty of Science and Engineering, Doshisha University; Faculty of Science and Engineering, Doshisha University; Faculty of Science and Engineering, Doshisha University
Issue Date2009-02-27
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication titleJAXA special publication: Proceedings fo 40th Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2008
宇宙航空研究開発機構特別資料: 第40回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2008論文集
Publication date2009-02-27
AbstractIn this study, we deal with the tumbling, which is a rotating motion with the axis perpendicular to the falling direction. Our purpose is to reveal the fundamental aerodynamic characteristics of the tumbling, experimentally. As the test plate, we consider a prism with a rectangular cross section with a depth-to-width ratio lambda of 0.3. As a result, the reduced terminal rotating rate omega(sup *), the lift coefficient C(sub L), the drag coefficient C(sub D) and the lift-to-drag ratio C(sub L)/C(sub D) are independent of the aspect ratio AR, when AR is greater than 10. As the inertia moment ratio I(sup *) increases from zero to 50, omega(sup *), C(sub L) and C(sub D) increase. However, omega(sup *), C(sub L) and C(sub D) become almost constant, if I(sup *) is greater than 50. We propose the empirical formulae to predict them.
Description形態: カラー図版あり
会議: 第40回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2008. 会期: 2008年6月12日-6月13日. 会場: 東北大学片平キャンパス
Document TypeTechnical Report
JAXA Category特別資料
Report NoJAXA-SP-08-009

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