二元矢量喷管内流特性的数值模拟

 应用多重网格ＭａｃＣｏｒｍａｃｋ显示格式对不同矢量角下二元喷管的流动进行了模拟分析。计算时，在细网络上采用了雷诺平均Ｎ－Ｓ方程和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值也与实验结果吻合。通过计算结果分析了喷管几何参数对流场的影响。所得结果显示出多重网格算法高效可靠，可用于开展参数研究

NUMERICAL SIMULATIONS OF INTERNAL FLOW CHARACTERISTICS IN TWO-DIMENSIONAL NOZZLES WITH THRUST VECTORING

Numerical simulations of internal flows with thrust vectoring in two-dimensional convergent-divergent nozzles utilizing multigrid technique in conjunction with MacCormack's explicit scheme are presented in this paper. The computations employ the Reynolds averaged Navier-Stokes equations for the fine grids with K-ε turbulence model,and on the coarse grids, on the other hand, Euler equations are solved. 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. The results demonstrate that the multigrid technique adopted here is reliable and suitable for parametric study.