摘要
从曲线坐标下的三维平均雷诺的N S方程出发 ,并用k ε两方程湍流模型封闭方程组 ,采用二阶精度的精度无波动、无自由参数的耗散差分格式 (NND格式 ) ,发展了模拟塞式喷管三维流场的数值程序 ,并对线性塞式喷管和瓦状塞式喷管在不同落压比下的三维流场进行了数值模拟研究 .结果较好地预示了塞式喷管的三维流场特征 ,并且显示瓦状塞式喷管除了圆柱形结构比平板更能承载外 。
Based on three dimensional Reynolds averaged Navier Stokes equations and low Reynolds number k ε equations, a numerical program to simulate the 3D flowfield of aerospike nozzle was developed by employing two order Non oscillatory and Non free parameters Dissipative finite difference scheme. The 3D flowfield of a linear aerospike nozzle and a tile shaped aerospike nozzle at different flight altitude were predicted. The results indicate that the pressure distribution on the plug of a tile shaped aerospike nozzle have the advantage of load uniformity, and the cylindrical plug can load more than the planar plug under the same conditions.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2002年第5期601-604,共4页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家 8 63高技术航天领域资助项目 (863 2 3 4 10 )
高等学校博士学科点专项科研基金资助项目 (2 0 0 0 0 0 0 619)
关键词
塞式喷管
流场
数值模拟
火箭发动机
rocket engines
three dimensional flow
computational fluid mechanics
aerospike nozzle
