A3 タンブリングの断面形状効果に関する風洞実験(空力特性I)

DOI Web Site

書誌事項

タイトル別名
  • A3 Wind-Tunnel Experiments of Cross-Section-Geometry Effect upon Tumbling

抄録

Balls used on rugby and American football are like prolate spheroids rather than spheres.Those balls sometimes autolotate, more specifically tumble, during their flights. The present study is a fundamental approach to reveal aerodynamic characteristics of such a prolate spheroid in tumbling motion. Specifically speaking, the authors conduct subsonic wind-tunnel experiments, in order to investigate the effect of the depth-to-width ratio λ upon the tumbling of a simple two-dimensional rectangular-cross-section prism. And the authors carry out the flow visualisation by a smoke-wire method and the velocity measurement by a hot-wire anemometer together with a synchronised prism-angle measurement. As a result, there exist two flow modes for λ < 0.6 and λ > 0.6. Especially at λ = 0.5, we can see transition-process features between the two flow modes.

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ