Investigations into asymmetric oscillations of a symmetric airfoil

Abstract

Wind tunnel experiments are conducted on NACA 0012 airfoil model to investigate the effect of high reduced frequency and asymmetry in pitch oscillations on the aerodynamic characteristics and hysteresis behavior associated with the oscillating motion of the airfoil at Reynolds number 105. The aerodynamic loads are quantified by surface pressure measurements on the mid span of the airfoil. The results indicate that pitch asymmetry and high reduced frequency have profound effect on the flow structures, and hence the integrated loads on the airfoil section.