EXPERIMENTAL AND NUMERICAL ASSESSMENT OF A LAST STAGE ST BLADE DAMPING AT LOW LOAD OPERATION

Andrea Bessone, Luigi Carassale, Roberto Guida, Zdeněk Kubín, Antonio Alfio Lo Balbo, Michela Marrè Brunenghi, Lorenzo Pinelli

Abstract


As LP steam turbines are requested to work at strong part-loads, LSB stalled and unstalled flutter may occur. Testing on a downscaled steam turbine in T10MW test plant have been carried out to measure LSB aggregated damping at low load. Also numerical analysis to predict aerodynamic damping have been performed and results have been compared to experimental data, allowing software tool validation at low load.

Keywords


low pressure steam turbine blade, flutter, low load operation

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ISSN 2336-5382 (Online)
Published by the Czech Technical University in Prague