TY - GEN
T1 - Control of airfoil flow at cruise condition by DBD plasma actuator
T2 - 8th AIAA Flow Control Conference, 2016
AU - Asano, Kento
AU - Sato, Makoto
AU - Nonomura, Taku
AU - Oyama, Akira
AU - Fujii, Kozo
PY - 2016
Y1 - 2016
N2 - We have conducted large-eddy simulations of the airfoil flow at a cruise condition controlled by a DBD plasma actuator. The NACA0015 is used as the airfoil. The Reynolds number and angle of attack are set to be 63000 and 4 deg., respectively. In this condition, the flow is almost attached, except for the separation bubble region, over the airfoil. The lift-to-drag ratio is improved by the flow control with the burst mode actuation. The most effective burst frequency becomes F+ ≃ 6 and the normal mode actuation is not effective. The delay of the turbulent transition is one of the key mechanism for the effective flow control at the cruise condition, differently from the separation control case. The flow feature and aerodynamic performance are compared between the controlled flow and “Ishii airfoil” flow, which is developed as a low-Reynolds-number airfoil. The lift-to-drag ratio attained by the flow control is comparable to that of the Ishii airfoil. Moreover, it can be said that the flow control by the plasma actuator on the simple shape airfoil has the capability to emulate the flow feature of the sophisticated airfoil.
AB - We have conducted large-eddy simulations of the airfoil flow at a cruise condition controlled by a DBD plasma actuator. The NACA0015 is used as the airfoil. The Reynolds number and angle of attack are set to be 63000 and 4 deg., respectively. In this condition, the flow is almost attached, except for the separation bubble region, over the airfoil. The lift-to-drag ratio is improved by the flow control with the burst mode actuation. The most effective burst frequency becomes F+ ≃ 6 and the normal mode actuation is not effective. The delay of the turbulent transition is one of the key mechanism for the effective flow control at the cruise condition, differently from the separation control case. The flow feature and aerodynamic performance are compared between the controlled flow and “Ishii airfoil” flow, which is developed as a low-Reynolds-number airfoil. The lift-to-drag ratio attained by the flow control is comparable to that of the Ishii airfoil. Moreover, it can be said that the flow control by the plasma actuator on the simple shape airfoil has the capability to emulate the flow feature of the sophisticated airfoil.
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U2 - 10.2514/6.2016-3624
DO - 10.2514/6.2016-3624
M3 - Conference contribution
AN - SCOPUS:85088358522
SN - 9781624104329
T3 - 8th AIAA Flow Control Conference
BT - 8th AIAA Flow Control Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
Y2 - 13 June 2016 through 17 June 2016
ER -