Rotordynamics of Industrial Gas Turbines by FE Models
The development trend of advanced industrial gas turbines is towards larger sizes and higher power outputs improving performance and thermal efficiencies to compete in the international market.
This implies, inter alia, that rotating parts are much more stressed having the same and often more stretched requirements in terms of life and reliability.
Among the technical disciplines related to the design of Gas Turbines, Rotordynamics is playing a more critical role along the engine development from the prediction phase through experimental results to the service operation.
As a consequence, the mathematical modelling is becoming an indispensable tool and efforts to improve its suitability to reproduce the physics are continuously pursued.
This paper describes the achievements obtained applying an improved FE model, using SAMCEF code, to the new advanced Gas Turbine 701 F, the first 230 MW entered service, comparing critical speed prediction and experimental test results gathered in the Shop Tests.
KeywordsCritical Speed Polar Diagram Prediction Phase Experimental Test Result Technical Discipline
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