摘要
该文采用有限体积法通量向量分裂格式数值模拟了喷管欠膨胀射流外流场。分析了不同欠膨胀压比下的喷管自由喷流流场。在空间方向采用通量向量分裂格式对Euler方程进行离散,在时间方向采用多步Runge-Kutta方法进行离散。计算反映了不同外流情况下欠膨胀射流对流场的影响。结果显示,通量向量分裂格式能够较好地捕捉到激波、滑移线以及激波交点等组成的复杂流场结构,在激波面上不会产生伪振荡和抹平现象,说明采用通量向量分裂格式模拟喷管射流是可行的。
The flux vector splitting scheme based on the finite volume method is adopted to simulate numerically the nozzle underexpanded jet outflow-field.The numerical method is used for simulating the different nozzle underexpanded free jet flows.The Euler equations are discretized using the flux vector splitting schem in space,and multi-step Runge-Kutta method in time respectively.The effect of the underexpanded jet outflow-field of different configurations on the flow field are calculated.The results show the complicated flow field structures including shock waves and slipstreams are well captured using the flux vector splitting scheme with no numerical oscillation and artificial viscosity,and the flux vector splitting scheme is suitable for simulating the nozzle underexpanded jet outflowfield.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2013年第5期659-663,共5页
Journal of Nanjing University of Science and Technology
基金
国防基础科研项目
关键词
欠膨胀射流
通量向量分裂格式
外流场
激波
underexpanded jet
flux vector splitting scheme
out flow-field
shock waves
