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Effects of Wavelength and Amplitude Variation on the Plasma Leading Edge Tubercles

The effect of the wavy leading edge, as observed on the humpback whale’s flippers, is attained on a three-dimensional wing model using plasma actuators. Dielectric Barrier Discharge plasma actuators acted as virtual tubercles on the wing surface, and named as plasma tubercles. These plasma tubercles have enhanced the aerodynamic properties of the wing. Effect of wavelength and amplitude variations of the plasma tubercles is studied experimentally using Particle image velocimetry (PIV) technique in the present research. Effect of wavelength is studied by varying the distance between two consecutive plasma actuators. Amplitude variation of plasma tubercles is controlled using the applied voltage to plasma actuators. Moreover, the methods for varying the amplitude and wavelength of these plasma tubercles are suggested, and successfully implemented.