著者

小國 稔記 大上 芳文

出版者

一般社団法人日本機械学会

雑誌

関西支部講演会講演論文集

巻号頁・発行日

vol.2000, no.75, pp."3-23"-"3-24", 2000-03-16

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A winglet is one of the wing-tip plates to prevent the formation of wing-tip vortices which cause a decrease of Cl (Lift Coefficient) / Cd (Drag Coefficient). The ground effect causes an increase of Cl/Cd of airfoils in proximity to the ground. Therefore, the winglets and the ground effect have the same function. Birdman's glider or WIG (wing in ground) use both of them. Aerodynamics characteristics of the winglets in the ground effect are, however, not well-known. The purpose of this paper is to study the optimum design of winglets in the ground effect by computational fluid dynamics. In concluding, the best angle is a dihedral angle of 45 degrees for winglets in ground effect.