Theory on Wings Doing Nonuniform Streamwise Motions in an Incompressible Perfect Fluid

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  • 非圧縮完全流体中で飛行方向に非一様運動を行なう薄翼の理論
  • ヒ アッシュク カンゼン リュウタイチュウ デ ヒコウ ホウコウ ニ ヒ イチ

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Abstract

There are few papers for nonuniform in-plane motions of wings, practical applications of which may concern lead-lag motion of helicopter blades and motions of horizontal stabilizer in T-Tail flutter. In the present formulation Fouriertransform is used, which makes development of the theory straighttorward, universal, and routine. Drag problems (on zero-lift symmetric wings) and lift problems (on zero-thickness wings) are treated for both two-and three-dimensional cases. Drag problems show a drag due to the instant acceleration, while lift problems yield and upwash dependent on the whole history of th wing motions.

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