抄録
A numerical simulation solving the axi-symmetrical Navier-Stokes equations for the gas flow inside of an elliptical model was performed, in which supersonic jets are emitted into the elliptical cell forming propagating shock waves. The shock waves reflect on the wall of the elliptical cell and focus on the focal point. In the calculations, the effect of the jet duration, the jet Mach numbers, and the exit height of the elliptical cell mainly on velocities near the exit and outside of the cell are investigated. As the result, it was found that the variations of the velocity at the cell exit are attenuated by the cell itself during the process of the propagation of the pressure waves. The attenuation of the velocity variations is observed outside of the cell showing the gradual variations. Also there is the optimum height of the exit that affects the reflected shock waves focusing at the focal point of the cell.
