減衰を有する膜面から成るセイル翼の非定常特性

概要

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The sailwing has many special characteristics due to its flexible structure. In particular, initially stretched small tension, it shows hysterisis of aerodynamic characteristics against incident angles. It is very interesting to investigate sailwing performance under unsteady conditions, which depends on aerodynamic forces, its profile forms, and damping properties of a membrane, but there have been few papers on the effect of the damping force on the unsteady sailwing. In this paper numerical methods are presented for obtaining an unsteady sailwing. The time variation of profiles and lift forces under an unsteady flow can be calculated, taking account of proportional damping by the membrane. The damping force coefficients used in numerical simulations are estimated by vibrating tests for a cloth of vinyl chrolide and the effects of the damping force on the unsteady characteristics are numerically examined.
一般社団法人日本機械学会の論文
1994-04-25