This paper focuses on the wake features of autorotation status mainly including the induced velocity and tip vortex trajectory in order to preliminary explanation the principle of rotation. In this work. the flow features of autorotating rotor were investigated in water tunnel via particle image velocimetry (PIV) technique. The experiments were conducted with a two-blade single rotor ... https://lecoureures.shop/product-category/plein-air-femme-chaussures-soulier/