对短周期风洞中二维涡轮叶栅的非定常数值模拟

UNSTEADY NUMERICAL ANALYSIS OF 2D TURBO CASCADES TESTED IN SHORT DURATION FACILITIES

了对短周期风洞实验中，实验段建立起周期性稳定流动的时间进行估算，以便在实验中把握测量时间，保证测量数据的有效性和推确性，本文采用显式时间推进方法求解二维Ｅｕｌｅｒ方程对短周期风洞中二维涡轮叶栅的非定常流动进行了模拟。除预测建立起周期性稳定流动过程中的流场特征和达到周期性稳定流动所需的时间外，对叶片的升力等冲击载荷在建立起周期性稳定流动过程中的变化也进行了估算。

Numerical analysis was done using time marching method to solve 2D Euler equations in order to simulate the flow field of 2D turbo cascades tested in short duration facilities. The results indicated that the time establishing a steady flow field is much shorter than the operation time of short duration facilities. The flow field characters are obtained as well as the unsteady lift and drag of the blades. It's very helpful for programming test schemes and the design of short duration facilities.