二维非对称喷管数值模拟与验证

Simulation and Experiment Validation of a Two Dimensional Asymmetric Ramp Nozzle

采用Fluent软件针对二维非对称喷管进行数值模拟,考察了其中几种常用湍流模型及网格密度对模拟精度的影响,并将计算结果与NASA公布的实验数据进行比较,找出了精度较高、求解快捷的模拟方案,结果表明FLUENT软件可以应用于带高超声速外流的非对称超声速喷管内外流场的数值计算。

The Computational fluid dynamics (CFD) software FLUENT was used to simulate the flow in the 2D asymmetric ramp-nozzle. The effect of four widely used turbulent models and three kinds of grid density on the numerical results were discussed. All the numerical results are compared with the experimental data published by NASA and agree with each other very well. It shows that FLUENT software with medium grid density and RNG k-Ε model can quickly yield accurate result, so it is very suitable for the internal and external flow simulation of a 2D asymmetric ramp nozzle with hypersonic free stream.