Considering gas phase unsteadiness and droplet internal recirculation,we developed an unsteady evaporation and combustion model for moving droplets.It adopts dynamic grid method tracking droplet interface location and conservation equations updating interface boundary conditions.Based on one step global chemical reaction,flame shape and combustion characteristics of n-heptance droplets at different convective velocity are simulated and analyzed.It shows that internal recirculation of moving droplet promotes low temperature area moving to the center of recirculation.Envelop flame translates into wake flame as convective velocity exceeding a critical value.Area of fuel rich and high temperature region and combustion rate at envelop flame are higher than those of wake flames remarkably.Droplet surface temperature and evaporation rate distribution at an envelop flame are different from those of wake flame obviously as well.

A mechanism model for arc discharge plasma is analyzed.An exploding wires diathermanous model for of arc discharge plasma incident shock was found.It shows that thermal mechanism dominating the shock wave control process is arc discharge plasma aerodynamic actuation.Effect of arc discharge plasma to supersonic flow field is a conform of protuberance with a bevel.The theoretical analysis is suit only for small y.The exploding wires diathermanous model is good for arc discharge plasma incident shock as diathermanous power rate is 10% of discharge power.The plasma wedge angle and incident shock angle decrease as total pressure and flow velocity increased,and they increase as average power of discharge increased.These variations are obvious at low total pressures,low flow velocities and low average powers.