不同矢量偏角下二元喷管内流特性的数值研究

应用多重网格MacCormack显式格式对不同矢量角下二元喷管的内部流动进行了模拟分析。计算时, 在细网格上采用了雷诺平均N-S方程与k-ε湍流模型方程；在粗网格上则采用Euler方程。数值计算给出了较清晰的流谱, 壁面压力分布的计算也与实验结果相吻合。通过计算结果分析了矢量喷管几何参数对流场的影响, 并对矢量喷管的推力特性进行了数值研究。 

NUMERICAL SIMULATION OF INTERNAL FLOW IN 2-D NOZZLES WITH THRUST VECTORING

Numerical simulation of internal flow with thrust vectoring in two-dimensional convergent nozzles is described,which utilizes multigrid technique in conjunction with MacCormack’s explicit scheme.In computations,the Reynolds averaged Navier-Stokes equations are adopted for the five grids with K-ε turbulence model;and on the other hand,Euler equations are solved on the coarse grids.Numerical results provide good resolution to the flow fields,and the computed pressure distributions are found in good agreement with the experimental data.The influences of geometric parameters upon the flow quality and thrust coefficient are also analyzed.It is demonstrated that the multigrid technique adopted here is reliable and suitable for parametric study.