Title: Large-eddy simulations of flows controlled by DBD plasma actuator for better wing performance at cruise conditions
Abstract: Large-eddy simulations (LESs) of the flows controlled by a DBD plasma actuator on a NACA0015 airfoil at curise conditions are performed. The Reynolds number is set to be 63,000, and the angle of attack is set to be from 2 to 8 degree, respectively. The DBD plasma actuator is installed at 5% of the chord length from the leading edge on the airfoil surface of the suction side. The actuator is driven with a burst mode actuation which is one of an effective strategy for separated flow control. At the high angle of attacks, the actuator achieves better flow control and get higher lift-drag ratio than Ishii airfoil due to drag reduction. In each angle of attack, the actuator generates the spanwise vortices shed from the leading edge and promotes a flow reattachment. As a result, the separation bubble becomes shorter and a pressure recovery occurs at the location closer to the leading edge compared with the case without the control. The tendency is same for the cases of the Ishii airfoil and achieve to the improvement of the aerodynamic performance.
Publication Year: 2019
Publication Date: 2019-01-01
Language: en
Type: article
Indexed In: ['crossref']
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