Numerical simulation of interaction of spark discharge synthetic jet with supersonic flow

By equating the physical effects of the spark discharge with gas Joule heating and adding source term in energy equation, a phenomenological simulation of spark discharge synthetic jet issuing into supersonic flow was accomplished. The interaction of the spark discharge synthetic jet with the supersonic crossflow was investigated, the results show that spark discharge synthetic jet can cause separation and reattachment in the supersonic flow, and relatively strong bow shake waves are generated. The upstream separation length and strength of shake wave increase at first and then decrease as jet spouts out. The shake wave is bow-shaped at the beginning and gradually becomes oblique as it weakens. The jet-to-crossflow momentum flux ratio and interaction effect increase greatly as discharge energy rises. Because of the big inertia and injection of supersonic flow, the refill mass rate of actuator declines.