Portal de Periódicos da CAPES

Prediction of Turbomachinery Aeroelastic Behavior From a Set of Representative Modes

2012; ASM International; Volume: 135; Issue: 1 Linguagem: Inglês

10.1115/1.4006536

1528-8900

María A. Mayorca, Damian M. Vogt, Hans Mårtensson, Torsten Fransson,

Turbomachinery Performance and Optimization

A method is proposed for the determination of the aeroelastic behavior of a system responding to mode-shapes which are different from the tuned in vacuo ones, due to mistuning, mode family interaction, or any other source of mode-shape perturbation. The method is based on the generation of a data base of unsteady aerodynamic forces arising from the motion of arbitrary modes and uses least square approximations for the prediction of any responding mode. The use of a reduced order technique allows for mistuning analyses and is also applied for the selection of a limited number of arbitrary modes. The application of this method on a transonic compressor blade shows that the method captures the aeroelastic properties well in a wide frequency range. A discussion of the influence of the mode-shapes and frequency on the final stability response is also provided.