Research Paper
Effect of an Airfoil Profile on Dynamic Lift Generation with Impulsive Incidence Variation
2020 年 5 巻 p. 75-79
詳細
2020 年 5 巻 p. 75-79
The purpose of this study is to investigate the relationship between unsteady fluid forces and airfoil profiles. It is necessary to know the unsteady properties determined from the vortex dynamics, as unsteadiness is known to increase the lift force. In this study, by using a rectangular airfoil and a discoid airfoil, the angle of attack of the airfoil was impulsively changed from 0° to an angle set beyond the static stall angle. When the airfoil was raised to form a large angle of attack, a delay of the stall was observed, and a high CLmax was attained. Also, CL gradually decreased after the airfoil stopped, and the value of CL asymptotically came to that of the static condition. For the discoid airfoil, the decrement of CL, just after the airfoil stopped, was suppressed in contrast to the rectangular airfoil.
