中文摘要：

针对某静止环形叶栅的激励实验工作，相应的对扩压叶栅进行了不同气流攻角和激励频率的非定常粘性计算与流场分析。计算中，结合实验结果分析了在不同气流攻角下，激励频率对损失系数、负荷系数、功损比等性能的影响。计算结果揭示了在激励流动下流场的时空结构的变化是流场性能得到提升的根本原因。

英文摘要：

In regard to the excitation experiments, time Accurate numerical stimulation was carried out to investigate the upstream disturbance frequency effect under different incidence in an annular cascade. Combined with experimental results, the disturbance frequency effect on loss coefficient, load factor, and work-loss ratio was discussed. The change of time-space flow structure is the principal cause of the performance improvement.