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- W2789871111 abstract "This paper presents component design and rotordynamic analysis results of axial turbine applied to a 10 MW super-critical CO₂ cycle. The axial turbine consists of 3 stage turbine blades and a shaft supported by two fluid film bearings. To prevent the leakage, we installed two seals near the turbine inlet and exit side. We adopts a tilting pad bearing for the stable operation of the rotor. The tilting pad bearing consists of 5 pads and leading edge grooves are installed for the effective thermal management. Based on the rotor layout, we conduct a rotordynamic analysis. The dynamic coefficients of the tilting pad bearings were calculated based on the thin film lubrication theory. Turbine blades, thrust collar and seals were modeled as equivalent inertia. The predicted Campbell diagram showed that there are three critical speeds, namely the conical and the first , second and third bending critical speeds under the rated speed and it is predicted that the rotor have 20% separation margin for the fourth bending critical speed. In addition, unstable modes are not presented under the rated speed and the unbalance response prediction showed that vibration levels are controlled within 0.02 mm for all speed ranges owing to the high damping ratio of the modes." @default.
- W2789871111 created "2018-03-29" @default.
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- W2789871111 date "2018-02-28" @default.
- W2789871111 modified "2023-10-14" @default.
- W2789871111 title "Rotordynamic Characteristic Analysis for Axial Turbine for the 10 MW Super-critical CO₂ Cycle Application" @default.
- W2789871111 doi "https://doi.org/10.5293/kfma.2018.21.1.013" @default.
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