A-27 レース無しラグビーボールの空力特性(FD球技)

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タイトル別名
  • A-27 The aerodynamic characteristics of a rugby ball without the lace
  • レース無しラグビーボールの空力特性
  • レース ナシ ラグビーボール ノ クウリキ トクセイ

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抄録

This paper describes the aerodynamic characteristics on the non-spinning rugby ball. The drag, the lift, the side force and the pitching moment were measured as functions of the Reynolds number, the angle of attack and the seam angle which represents the position of the seam. It was found that the critical Reynolds number increases with increasing the angle of attack. The Reynolds number dependence of the drag coefficient at the angle of attack of 90° is similar to that of a circular cylinder. At the angle of attack of 90°, the seam angle dependence of the side force coefficient does not depend on the lace but the seam. At the angle of attack of 30°, it depends on the lace as well as the seam.

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