Аннотация:Experimental and numerical investigations were conducted on the development of a surface sliding discharge in the zone of interaction of an oblique shock wave with a boundary layer and the gas dynamic flow field after the discharge. The evolution of the flow field after the discharge was investigated by high-speed shadowgraphy. The dynamics of shock waves induced by the discharge and their influence on the shock wave structure of the high-speed flow were analyzed based on digital processing of shadowgraphy images. Numerical model was conducted on the local surface energy input in non-uniform supersonic flows in a channel based on unsteady Navier-Stokes equations. Experimental and numerical results indicate that the dynamics of induced shock waves are dependent on the spatial-temporal characteristics of the energy input, as observed through a comparison of the two sets of data. Using a time-distributed energy input model, it is determined that the energy inputted into the gas, which results the generation of a shock wave from the discharge channel in flow with an oblique shock wave, is 0.15–0.36 J at flow Mach numbers 1.18-1.68 and density 0.02-0.45 kg/m3.
