Abstract: Numerical simulation of plug nozzle flow field was completed based on 3-D TLA N-S equations with NND2M scheme. Calculations were performed under ideal, perfect gas assumptions. Turbulence was taken into account with a k-ε turbulence model. The flow structure and properties obtained agree well with the results reported.It shows that NND2M scheme is suitable for numerical simulation of complex jet flow.

Key words: Plug nozzle rocket engine;Nozzle flow;Flow distribution;Numerical simulation;Navier-Stokes equation

摘要： 采用NND2M差分格式 ,从考虑k ε湍流模型的理想气体三维薄层近似N S方程出发 ,对塞式喷管内外流场进行了数值模拟。计算结果与国外文献十分一致。通过流场分析 ,对塞式喷管流动机理有了清楚的认识。计算表明NND2M差分格式及相应计算软件适合于模拟复杂喷流流场 ,可用于塞式喷管发动机的研究。

关键词: 塞式喷管火箭发动机;喷管气流;流动分布;数值仿真;纳维尔斯托克斯方程