TY - JOUR
T1 - Numerical research on airfoil transition delay by alternative current dielectric barrier discharge actuation
AU - LIU, Bei
AU - LIANG, Hua
AU - HAN, Zhonghua
AU - LI, Yinghong
AU - LIU, Fei
AU - CHI, Jiangbo
AU - DING, Zhiwen
N1 - Publisher Copyright:
© 2020
PY - 2021/2
Y1 - 2021/2
N2 - A Dielectric Barrier Discharge (DBD) plasma actuator can create a body force which locally accelerates the base flow leading to an attenuation of broadband disturbance to delay the transition. In this study, numerical simulation on an NLF0416 airfoil is conducted to investigate transition delay and drag reduction by a DBD plasma actuator. To simulate plasma's effect more accurately, boundary-layer data is acquired from Reynolds Averaged Navier Stocks (RANS) equations instead of laminar boundary layer equations, although RANS equations need a much finer boundary-layer grid, and the linear stability analysis method is used to analyze the boundary layer and get the transition point. In this study, the influences of different actuation intensities and positions are investigated, and results show that if the actuation intensity is stronger and the actuation position is closer to the base transition point, more drag reduction can be obtained. However, the efficiency of plasma transition delay is really low. For example, when the actuation voltage is 16 kV, the actuation frequency is 1 kHz, and the main Mach number is 0.1, the saved power due to drag reduction is about 5.09 W, but the power consumed is about 32.61 W, and the efficiency is just 15.6%.
AB - A Dielectric Barrier Discharge (DBD) plasma actuator can create a body force which locally accelerates the base flow leading to an attenuation of broadband disturbance to delay the transition. In this study, numerical simulation on an NLF0416 airfoil is conducted to investigate transition delay and drag reduction by a DBD plasma actuator. To simulate plasma's effect more accurately, boundary-layer data is acquired from Reynolds Averaged Navier Stocks (RANS) equations instead of laminar boundary layer equations, although RANS equations need a much finer boundary-layer grid, and the linear stability analysis method is used to analyze the boundary layer and get the transition point. In this study, the influences of different actuation intensities and positions are investigated, and results show that if the actuation intensity is stronger and the actuation position is closer to the base transition point, more drag reduction can be obtained. However, the efficiency of plasma transition delay is really low. For example, when the actuation voltage is 16 kV, the actuation frequency is 1 kHz, and the main Mach number is 0.1, the saved power due to drag reduction is about 5.09 W, but the power consumed is about 32.61 W, and the efficiency is just 15.6%.
KW - Dielectric Barrier Discharge (DBD)
KW - Efficiency analysis
KW - Linear stability analysis
KW - Plasma flow control
KW - Plasma transition delay
UR - http://www.scopus.com/inward/record.url?scp=85091881733&partnerID=8YFLogxK
U2 - 10.1016/j.cja.2020.06.002
DO - 10.1016/j.cja.2020.06.002
M3 - 文章
AN - SCOPUS:85091881733
SN - 1000-9361
VL - 34
SP - 441
EP - 453
JO - Chinese Journal of Aeronautics
JF - Chinese Journal of Aeronautics
IS - 2
ER -