Experimental study on the evolution of shock waves generated by high-pressure diesel spray

Abstract

High fuel injection pressure leads to supersonic fuel jet and shock wave phenomenon. The characteristic of shock waves induced by supersonic jets under different working conditions were researched based on visualization experiments. The shock wave classification characteristics were studied. This paper indicates that the shock wave angle decreases with the increase of fuel injection pressure. And the shock wave angle increases with the time. The increase of ambient pressure will speed up the separation time of the spray and the shock wave. The classification of the shock wave is determined by the Mach number of the spray.