The Study of the Interaction of a Supersonic Free Jet and a Vertical Plate

Abstract

The rotational temperature distribution in the interaction region of a supersonic free jet and a vertical plate, which is a plate fixed vertically to the centerline of the free jet, is measured experimentally by electron beam fluorescence method. The source gas is cold N_2 and the pressure ratio is 520. It is found from the distribution that there is a bow-like shockwave in front of the vertical plate and the relaxation of the rotational temperature is carried out approximately to the stagnation temperature. This result is in good agreement with that of the numerical simulation by DSMC method.