Abstract

Results of an ongoing study on flow control on low aspect ratio wings are presented. The Reynolds number regime Re < 100 000 is aimed at micro air vehicle (MAV) applications. Force measurements for different wing–actuator combinations are compared and the frequency response of lift increase at different angles of attack is discussed. A frequency nondimensionalization for active flow control on low aspect ratio wings inspired by bluff body aerodynamics is proposed to make the frequency scan data independant of angle of attack. To gain insight into the changes of flowfield characteristics as control is applied both time mean and phase averaged PIV data are presented and discussed.

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