本文对大转角压气机叶栅大攻角工况在来流尾迹非定常激励作用下的时空结构进行了数值分析.合理的非定常激励明显提升了叶栅的时均性能,与激励频率对应的涡结构得到强化,其它频率的杂涡被卷吸,无序的吸力面分离流结构变得有序.文中分析了周期性来流尾迹控制分离结构的作用机理,波涡共振促进涡的卷起和配对;湍动能强化动量交换.基于此,比较了两种来流尾迹模式下分离结构对来流周期性的响应问题.另外,针对管道风扇引起的远场噪声,在来流尾迹非定常激励作用下对其降低的可能性进行了设想.
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