Issue |
MATEC Web Conf.
Volume 369, 2022
40th Annual Conference - Meeting of the Departments of Fluid Mechanics and Thermomechanics in the connection with XXIII. International Scientific Conference - The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy (40th. MDFMT & XXIII. AEaNMiFMaE-2022)
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Article Number | 02001 | |
Number of page(s) | 10 | |
Section | Modelling and Simulation in Fluid Mechanics and Energy | |
DOI | https://doi.org/10.1051/matecconf/202236902001 | |
Published online | 04 November 2022 |
Flow and Vibration in the Small Steam Turbine Last Stage
1 Doosan Škoda Power s.r.o., Experimental Research Dpt., 30100, Tylova 1/57, Plzeň, Czech Republic
2 Doosan Škoda Power s.r.o., Measurement & Diagnostics Dpt., 30100, Tylova 1/57, Plzeň, Czech Republic
* Corresponding author: michal.hoznedl@doosan.com
The paper deals with evaluation of experimental data obtained from the real-size 30 MW output Waste to Energy steam turbine. For many turbine regimes pressures in the last stage area were obtained. At the same time amplitudes of blade tips vibrations were measured of last rotor blades using the blade tip timing system and axial velocity of the steam at the last stage outlet. The obtained data are mutually correlated and relations are analysed between increased vibration values and pressure ratios at the last stage. Increased tip vibrations occur mainly in the area when the pressure ratio over the last blade tip and root is higher than one. In this case there is no expansion, but compression in the last stage of the turbine. The presented results contribute to understanding of processes in the last stage of the steam turbine, mainly for those regimes of turbine operation when its output is lower than 20 % of the nominal output, e.g. during the island regime.
Key words: steam turbine / last stage / low load regime / vibration / experiment
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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