This paper describes numerical simulation of rarefied nozzle plume impingements. Two different reservoir pressures 400 kPa and 4 kPa are considered, In the case of 400 kPa, the simulation of the nozzle flow was conducted by using the Navier-Stokes equation and then the analysis of the plume flow was carried out by the DSMC method employing the nozzle exit conditions obtained by Navier-Stokes equation. On the other hand., for 4 ...