二元喷管三维粘性流场的数值模拟

NUMERICAL SIMULATION OF 3-D VISCOUS FLOW IN NON-AXISYMMETRIC NOZZLE

本文用数值方法对二元喷管的三维粘性流场进行模拟 ,将 Mac Cormack有限差分格式拓广到全三维 N- S方程的求解。在数值迭代中使用加快收敛速度的当地时间步长 ,并根据格式压缩计算机存储量和计算量。进行了两个算例的数值模拟 ,计算结果与实验相符。

The three-dimensional viscous flow in non-axisymmetric nozzle are simulated numerically.MacCormack finite difference scheme is extended to solving three-dimensional Navier-Stokes equations.Local time step technique is adopted in numerical iteration for rapid convergence.The computer memory and CPU time are saved by proper programming.Two examples of simulation are presented.Favorable agreement is shown between computed and measured surface static pressure distributions.