Compressor Non-Synchronous Vibration
Non-synchronous vibrations (NSV) are a fluid-structure interaction that involves coupling between unsteady aero-disturbances with blade vibration modes. NSV has been shown to appear near-stall, characterised by part-span rotating stall disturbances which can 'lock-in' to vibration modes resulting in high response amplitudes. In other instances, NSV characteristics have been like those of flutter. Overall, modern compressors are more susceptible to these aerodynamic instabilities due to reduced compressor core size, reduced stages, and BLISKS. This project will investigate the influence of mode shapes on the aerodynamic coupling of NSV which will aid in developing a low-fidelity tool to assess NSV in multi-stage configurations.