用时间推进法数值求解叶轮机械跨音叶栅的粘性绕流问题

NUMERICAL ANALYSIS ON TRANSONIC CASCADE FLOWS OF TURBOMACHINERY BY TIME MARCH METHOD

应用一种高效、可靠的数值方法来模拟叶轮机械叶栅内部的实际流动，获取大量真实的流动信息，据此，在工程上可以总结出各种实用的规律，这样，可以为现代叶型设计提供一种快速、可靠、实用的途径．数值试验表明：用文中提出的二阶精度隐式矢通量单步差分格式求解叶栅的跨音流场，具有精度高、稳定性好、计算量少、收敛快等优点，在流场的计算中，较好地捕获了激波，与实验比较，结果令人满意．

High efficient and reliable numerical algorithm has been discussed for real flow of turbomachinery cascade. More details of flow information and many practical laws for moden blade design are obtained. Numerical calculations demonstrate clearly that a one step two order accuracy implicit flux vector splitting (IFVS) scheme has obvious superiority in aspects of accuracy, robustness, calculation time and convergence. In the case of 2 D transonic cascade flows, shock wave is exactly captured and the results are satisfied.