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

高速多级压缩机的非同步振动

• 批准号: 2859935
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2859935
• 关键词: Non; Synchronous; Vibration; Speed; Multi

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.

压气机非同步振动是一种流固耦合现象，它涉及到叶片非定常气动力（通常在失速附近）与叶片振动模态的强耦合。在某些情况下，NSV表现出部分翼展旋转失速的特征，可能会“锁定”到振动模式，并可能导致破坏性的响应幅度。在其他情况下，NSV似乎具有与扑动更密切相关的特征。尽管航空力学学术界和工业界进行了几十年的研究，但仍然没有一种明确的方法来避免NSV。