Computer Program for the Performance Analysis of Scarfed Nozzles.

摘要

An analysis is presented for predicting the performance of scarfed propulsive nozzles. The model assumes that the scarfing is not severe, so that the flow within the nozzle is axisymmetric. The flowfield within the nozzle and the scarfed nozzle extension is calculated by the method of characteristics. The oblique shock wave emaninating from the junction of the nozzle and the scarfed nozzle extension is fitted discretely and tracked through the flowfield. The nozzle forces are determined by integrating the wall pressure distribution. Nozzle axial and side forces are calculated, and missile axial and side forces are determined. A computer program implementing the analysis is discussed. Fifteen sample cases are presented to illustrate the use of the computer program. (Author)