Abstract
Autorotation phenomena of a thin elliptic cylinder about its spanwise axis is studied experimentally and numerically. Flow field was visualized by smoke wire method in wind tunnel using multi-exposure storobo-light synchronizing with the rotation, and by aluminum dust method in towing water tunnel. Variations of the lift, the drag, the moment and the torque coefficients with the rotating angle were measured using the strain gauge balance.
Numerical simulations using discrete vortex method were carried out for the same condition as to the experiments. Agreements between them were good.
