AXIAL-THRUST RESPONSES DUE TO GAS TURBINE'S ROTOR BLADE DISTORTIONS

The axial thrust imposed on the shaft of a gas turbine depends upon its rotor blade inlet inclination to the turbine's axial direction: this inclination can change due to the distortions resulting from fouling, aging, tip rubbing, erosion, thermal fatigue cracks, and corrosion. Relevant influential parameters for an operational gas turbine were measured. Theoretical predictions for the behavior of the same turbine were obtained from computer simulations. The results of both measurements and theoretical predictions were compared and showed qualitative correspondence. The rotor blade profile distortions result in significant increases in the axial thrust on the compressor, which adversely affects the gas turbine's thermodynamic performance, reliability, and operational life.
Автор:  B. T. Lebele-Alawa
Ключевые слова:  gas turbine, compressor, rotor blade, axial thrust, vibration.
Стр:  930