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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。
The NND2M difference scheme is used to simulate the internal and external flow field of a plug nozzle considering the approximate three-dimensional N S equation of an ideal gas with k ε turbulence model. The calculation results are in good agreement with the foreign literature. Through the flow field analysis, it has a clear understanding of the plug nozzle flow mechanism. The calculation shows that the NND2M difference scheme and the corresponding calculation software are suitable for simulating the complicated jet flow field and can be used in the research of the plug nozzle engine.