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- W810332199 abstract "A low frequency unsteady lifting-line theory is developed for a harmonically oscillating wing of large aspect ratio. The wing is assumed to be chordwise rigid but completely flexible in the span direction. The theory is developed by use of the method of matched asymptotic expansions which reduces the problem from a singular integral equation to quadrature. The wing displacements are prescribed and the pressure field, airloads, and unsteady induced downwash are obtained in closed form. The influence of reduced frequency, aspect ratio, planform shape, and mode of oscillation on wing aerodynamics is demonstrated through numerical examples. Compared with lifting-surface theory, computation time is reduced significantly. Using the present theory, the energetic quantities associated with the propulsive performance of a finite wing oscillating in combined pitch and heave are obtained in closed form. Numerical examples are presented for an elliptic wing." @default.
- W810332199 created "2016-06-24" @default.
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- W810332199 date "1981-04-01" @default.
- W810332199 modified "2023-09-27" @default.
- W810332199 title "An asymptotic unsteady lifting-line theory with energetics and optimum motion of thrust-producing lifting surfaces" @default.
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- W810332199 hasPublicationYear "1981" @default.
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