不对称静子叶片非谐方案研究

为降低转子叶片在前排静子尾迹流场激振情况下的动应力,对转子系统进行不对称气动非谐设计.不对称静子叶片分布非谐设计下,转子所受到的激振力由静子叶片均布情况下的单频率高幅值激振力转变为多频率成分低幅值激振力.对不对称静子叶片非谐情况下激振力频率幅值进行推导,讨论了静子扇区分布和静叶数目选取对尾流激振力的影响,并对相同扇区分布不同静叶数目情况下转子叶片的强迫响应进行瞬态分析,给出不对称静子非谐设计的最优方案.

Asymmetry stator mistuned blade design and research

To reduce the dynamic stress of rotor blades under the wake of front stator vane,an asymmetry stator mistuned design was conducted.According to mistuned blade design for the asymmetry stator,the wake force on rotor changed from single frequency and higher amplitude to multi-frequency and lower amplitude.The frequency and amplitude of wake force were deduced theoretically,while the influence of stator sector distribution and stator vane quantity on the wake force of vane was also discussed.Transient analysis was conducted for the forcing response of rotor blades under the same stator sector distribution and different quantities of stator vane,so an optimum asymmetry stator mistuned design was developed.