多单元直排塞式喷管发动机性能

为了了解优化设计的塞式喷管的性能及燃气流动中热力学参数变化对性能的影响,对比钟型喷管与塞式喷管的高度特性,从曲线坐标下的三维平均雷诺N-S方程和Euler方程出发,采用LU时间隐式格式、MUSCL空间离散方法,发展了模拟塞式喷管三维流场的数值程序.计算了从喉部圆转方内喷管的性能,比较了冻结和变化热力学参数对塞式喷管性能的影响及塞式喷管与相同面积比钟型喷管的高度特性曲线.计算结果可为塞式喷管的设计研制提供参考.

Performance analysis of linear clustered aerospike nozzles

To investigate the performance of optimized aerospike nozzles, the effects of thermal parameters variation in gas flow on aerospike nozzles performance, and to compare the altitude characteristics of bell nozzle and aerospike nozzles with the same area ratio, a numerical program was developed by employing an implicit lower upper(LU) diagonal decomposition scheme and monotone upstream centered scheme for conservation laws(MUSCL) type approach. The control equations were three dimensional Reynolds averaged Navier Stokes equations and Euler equations. The performance of round to square cell was calculated. The effects of thermal parameters that were frozen or varied on aerospike nozzles performance were presented. The altitude characteristics of aerospike nozzles and bell nozzle were also compared. The results provide reference for the development of aerospike nozzles.