| Issue |
MATEC Web Conf.
Volume 412, 2025
42nd. Annual Conference “Meeting of the Departments of Fluid Mechanics and Thermomechanics” in the connection with XXIV. International Scientific Conference “The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy” (42nd. MDFMT & XXIV. AENMMTE-2025)
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| Article Number | 02001 | |
| Number of page(s) | 11 | |
| Section | Modelling and Simulation in Fluid Mechanics and Energy | |
| DOI | https://doi.org/10.1051/matecconf/202541202001 | |
| Published online | 05 September 2025 | |
Steam Turbine Last Stage under Low-load Conditions
1 Doosan Škoda Power a.s., Experimental Research, 301 28, Tylova 1/57, Plzeň, Czech Republic
2 Doosan Škoda Power a.s., Measurement & Diagnostics, 301 28, Tylova 1/57, Plzeň, Czech Republic
3 University of West Bohemia, Power system engineering department, 301 00, Univerzitní 8, Plzeň, Czech Republic
4 Doosan Škoda Power a.s., Thermodynamics, 32300, Tylova 1/57, Plzeň, Czech Republic
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
The low and variable load regimes of steam turbines have become a highly topical issue in recent times. Steam turbines frequently balance fluctuations in the power grid or operate with a heat source that has variable parameters, such as waste incineration plants. In such cases, the steam can have wetness content locally up to 19 %. During operation with variable output, compression, heating, and the formation of vibrations occur in the tips of the last stage rotating blades. Steam flows only through a portion of the available cross-section, while the remainder flows in reverse. Under such conditions, it is necessary to cool the exhaust section of the turbine. This paper describes contemporary knowledge regarding the behaviour of the steam flow and tip vibrations of rotating blades across various operating regimes. The flow parameters are monitored using pneumatic probes and local pressure and temperature measurements, while the vibration amplitudes are measured using the blade tip-timing method.
© The Authors, published by EDP Sciences, 2025
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