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，涉及叶片（通常在失速附近）的非定常气动力与其振动模式的强耦合。在某些情况下，非NSV表现出部分跨度旋转失速的特征，可能会“锁定”到振动模式，并可能导致破坏性的响应幅值。在其他情况下，非NSV似乎具有与颤振更密切相关的特征。尽管航空力学学界和工业界进行了几十年的研究，但目前还没有一个明确的方法来避免非成声v。

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.