A Note of Lifting-Line Theory on Wings with High Aspect Ratio in Ground Effect

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  • 地面近くの縦横比の大きな翼の揚力線近似ついての一考察
  • ジメン チカク ノ ジュウオウヒ ノ オオキナ ツバサ ノ ヨウリョクセン キ

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Abstract

A lifting-line theory is examined in detail for a wing with a high aspect ratio in the ground effect. Particularly, the method of the asymptotic expansions is applied to the integral equation given by the lifting-surface theory, unlike the method of the matched asymptotic expansions to a differential equation. Furthermore, the integrodifferential equation for a rectangular plane wing is estimated analytically by calculating the distribution of the circulation round a semi-infinite wing of constant chord, and comparison of the lift coefficient with earlier works is carried out.

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