Effects of plug contour simplification and truncation on linear plug nozzle

Based on NND scheme, a program to solve NS equations was built to predict the flow field and the performance of plug nozzle. The comparison was conducted for three types of nozzles, which were truncated line plug and truncated contour plug designed by method of characteristics. The shocks,expansion and reflected compression waves in the flow field were captured. The results show a good agreement with experiment data. The thrust performances of different plug contours under different altitudes and the effects of different truncations on plug nozzle were emphasized. The effects of plug contour on linear plug nozzle were concluded.