Development of Instability in Stream With Normal Shock Waves

The influence of a direct shock wave on the transformation of disturbances in the parameters of a supersonic gas flow is studied. The influence of disturbances in the velocity, density, pressure, temperature, and Mach number ahead of the wave on disturbances in the parameters behind it is shown. The velocity and density disturbances behind the shock wave depend extremely on the Mach number (with a maximum). This is in qualitative agreement with the experimental data on the transformation of turbulence. The value of the maximum point increases with increasing disturbances in the velocity ahead of the shock wave. With increasing disturbances in the density and temperature, this increase becomes less intense. As the disturbances in the density and temperature ahead of the shock wave increase, the disturbances in the velocity behind it increase. The shock wave increases disturbances in the flow temperature. With increasing disturbances in the density ahead of the shock wave, the influence of the Mach number weakens. The passage of the shock wave increases disturbances in the pressure in the flow. It is shown that disturbances in the pressure behind the shock wave increase with increasing disturbances in the velocity, density, and Mach number ahead of the wave.