A Method to Assess Flutter Stability of Complex Modes

TitleA Method to Assess Flutter Stability of Complex Modes
Publication TypeConference Paper
Year of Publication2003
AuthorsArnone A, Poli F, Schipani C
Conference Name10th International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines (ISUAAAT)
Keywordsaeroelasticity, complex modes, Flutter screening, preliminary design, time-linearized

A method to quickly predict aeroelastic stability or instability of blade row complex vibration modes is described. The computational approach is based on a time-linearized Navier-Stokes aeroelastic solver, and a specifically developed program. Time is saved by doing a few fundamental solver computations and then superposing the solutions to analyze each complex mode. Test results on two low pressure turbines are presented.


September 7–11, Durham, NC, USA