The study presented in this paper aims to extend a previous model for simulating blade casing interaction phenomena occurring in gas turbine aero engine compressors. The method is extended to explore the effects of changes to the aerofoil modeshape that occur as the amplitude of vibration increases. While these changes are small, they may have a significant influence on tip incursion due to the tight nominal clearances, and this may have a large effect on the severity of the interaction. The study includes a parametric analysis of various modeshape parameters that will help to formulate design rules for minimizing the risk of instability becoming initiated.
An improved simulation method for blade-casing interaction phenomena
PENNACCHI, PAOLO EMILIO LINO MARIA
2012-01-01
Abstract
The study presented in this paper aims to extend a previous model for simulating blade casing interaction phenomena occurring in gas turbine aero engine compressors. The method is extended to explore the effects of changes to the aerofoil modeshape that occur as the amplitude of vibration increases. While these changes are small, they may have a significant influence on tip incursion due to the tight nominal clearances, and this may have a large effect on the severity of the interaction. The study includes a parametric analysis of various modeshape parameters that will help to formulate design rules for minimizing the risk of instability becoming initiated.| File | Dimensione | Formato | |
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VIRM10_pennacchi_blade.pdf
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