230 蚊の羽ばたき飛行解明のための羽根の拡大モデル実験 : 実形状拡大翼モデルを用いた実験(S38-3 生物飛行,S38 生物飛行と小型飛翔体)  [in Japanese] 230 Experimental Study of Beating Motion of Mosquito by Using an Enlarged Model of Wing : Experiments by Using a Realistic Enlarged Model  [in Japanese]

The purpose of this study is to investigate flow pattern around mosquito's wing while it is beating. We constructed an experimental apparatus to simulate the beating motion of mosquito. An enlarged scale model experiment was carried out using a very low speed wind tunnel under the condition that Reynolds number and Strouhal number were made equal to those of real mosquito. The flow field around rectangular and realistic wing models moving up and down was visualized using smoke and laser light sheet and it was analyzed by a PIV system. It was observed that unsteady vortices were generated on the upper surface of the model wing in the period of downstroke. Further more, we made some experiments using a realistic wing model to simulate the real flapping motion.