Experimental investigation of nanosecond discharge plasma aerodynamic actuation  

作　　者：吴云 李应红 贾敏 梁华 宋慧敏 

机构地区：[1]Science and Technology on Plasma Dynamics Laboratory,Air Force Engineering University,Xi’an 710038,China

出　　处：《Chinese Physics B》2012年第4期401-405,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 50906100 and 10972236);the Science Foundation of National Excellent Doctoral Dissertation of China (Grant No. 201172)

摘　　要：In this paper we report on an experimental study of the characteristics of nanosecond pulsed discharge plasma aerodynamic actuation. The N2 （C3IIu） rotational and vibrational temperatures are around 430 K and 0.24 eV, respectively. The emission intensity ratio between tile first negative system and the second positive system of N2, as a rough indicator of the temporally and spatially averaged electron energy, has a minor dependence on applied voltage amplitude. The induced flow direction is not parallel, but vertical to the dielectric layer surface, as shown by measurements of body force, velocity, and vorticity. Nanosecond discharge plasma aerodynamic actuation is effective in airfoil flow separation control at freestream speeds up to 100 m/s.In this paper we report on an experimental study of the characteristics of nanosecond pulsed discharge plasma aerodynamic actuation. The N2 （C3IIu） rotational and vibrational temperatures are around 430 K and 0.24 eV, respectively. The emission intensity ratio between tile first negative system and the second positive system of N2, as a rough indicator of the temporally and spatially averaged electron energy, has a minor dependence on applied voltage amplitude. The induced flow direction is not parallel, but vertical to the dielectric layer surface, as shown by measurements of body force, velocity, and vorticity. Nanosecond discharge plasma aerodynamic actuation is effective in airfoil flow separation control at freestream speeds up to 100 m/s.

关 键 词：plasma aerodynamic actuation nanosecond pulsed discharge plasma flow control opti- cal emission spectra 

分 类 号：TH138[机械工程—机械制造及自动化]