Abstract
This paper shows the time-averaged effect of synthetic jet and plasma actuators on flow over a representative two-dimensional rotorcraft tail boom for delaying flow separation and, therefore, reducing pressure drag, whereas previous studies have evaluated these flow control devices on a circular cylinder. The percentage of pressure drag reduction is used to evaluate the effectiveness of these two unique actuators for varied applied voltage under device independent conditions such as actuator position and flow velocity. Two non-dimensional parameters were used to evaluate the effect of the actuators: coefficient of momentum (Cμ) and non-dimensional surface distance between the location of the actuator and the flow separation point (SDTB). Both actuation techniques beneficially affect the pressure distribution by decreasing the pressure near the location of the actuators and increasing the pressure in the separated flow region. Contour plots displaying the variation of the percentage of pressure drag reduct...
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