等离子体激励气动力学探索与展望

Plasma-actuated gas dynamics is an inter-discipline that concerns both the force and flow characteristics of an object submerged in flow, and the internal flow characteristics under the interaction of plasma actuation and flow, thus standing in the frontier of aerodynamics, gas dynamics, and plasma dynamics. Plasma actuation is a controllable disturbance imposed on the flow by either the collective motion of charged particles under electro-magnetic force or the pressure, temperature, and property variation produced by gas discharge. Affected by the local unsteady plasma actuation, the status of gaseous flow will change remarkably, which leads to a potential improvement of the aerodynamic performance. There have been tremendous investigations on surface dielectric barrier discharge plasma actuation, plasma synthetic jet actuation, as well as their interactions with boundary layer flow, separate flow, and shock-dominated flow. A systematic review of these investigations leads to the conclusion that there exists a strong coupling effect between plasma actuation and the modulated flow, and plasma shock control is a key to improving the control authority. Future researches should be directed towards the development of highly efficient plasma actuation, excitation, and leverage of flow instabilities, revealing coupling mechanism, and improvement of control effect.