Non-Synchronous Vibration for High-Speed Multi-Stage Compressors

压气机非同步振动是一种流固耦合作用，叶片的非定常气动作用力与其振型之间存在强耦合。在某些情况下，NSV似乎表现出部分跨度旋转失速的特征，并可能‘锁定’振动模式，并可能导致破坏性的响应幅度。在其他情况下，NSV的特征似乎与颤振更接近。尽管通过空气动力学学术界和工业界进行了几十年的研究，但还没有一个明确的方法来避免NSV。

Compressor non-synchronous vibration is a fluid-structure interaction that involves strong coupling of unsteady aerodynamic forcing of blades, usually near stall, with their vibration modes. In some circumstances NSV appears to show characteristics of part-span rotating stall and may 'lock-in' to vibration modes and may cause damaging response amplitudes. In other cases, NSV appears to have characteristics more closely aligned to flutter. Despite several decades of research through the aeromechanics academic and industrial communities, a clear method to avoid NSV does not yet exist.