Test and numerical simulation on magneto-hydrodynamic flow control with nonequilibrium ionization

In order to study the mechanism of MHD flow control, an experimental system based on MHD technology is established. Ma=3.5 flow is ionized with radio frequency-direct current composite discharge to acquire the bulk mass and uniform current. The research on accelerating/decelerating in different directional magnetic field is implemented, and the effect of MHD control is analyzed by static pressure of experimental section and quasi-one-dimensional model. The numerical simulation of MHD flow control with the MHD model is carried out based on the Navier-Stokes equation coupled with the electronmagnetism source term. The result shows that the bulk mass and the uniform current in Ma=3.5 flow can be acquired with radio frequency-direct current composite discharge, and the conductivity is 0.015 S/m. As a result of joule heat, the static pressure rises 130 Pa with accelerating Lorentz force, and 200 Pa with decelerating Lorentz force. There is less than 10% energy is spent on the MHD flow control. The result of numerical simulation shows that under the experimental condition, the static pressure rises 128 Pa with accelerating Lorentz force, and 208 Pa with decelerating Lorentz force. The simulation results agree basically with the experiment results.