Numerical Analysis of Dielectric Barrier Discharge Plasma Aerodynamic Actuation in Near Space

To investigate the plasma aerodynamic actuation process in near space,a mechanism model of dielectric barrier discharge plasma flow control was studied based on the macroscopically characteristic of hydrokinetics.Then the effects of plasma aerodynamic actuation at different altitudes were compared.At last,the effects of plasma aerodynamic actuation in the cases for different viscosities and different velocities at the near space of 20 km altitudes were numerically studied in detail.The results show that the transformation of physical properties based on dielectric barrier discharge process and the dynamical action of electrostatic are the two main mechanisms of dielectric barrier discharge plasma flow control.Plasma aerodynamic actuation is greater in near space than in sea level and the velocity and eddy induced by body force will increase as altitudes increase.The maximal induced velocity is 20 m/s and the height of induced eddy is more than 9 mm at 20 km.When the viscosity is unsteady in the range of 0.1~10 times,the effect of plasma aerodynamic actuation is easy to change.The effect of body force is not evident when the Ma of the velocity is more than 0.3.