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Open AccessArticle

Turbine Cascades of Last Stage Blades for Wide Range of Operating Conditions

1
Research and Development, Doosan Skoda Power, Ltd., 30128 Pilsen, Czech Republic
2
Institute of Thermomechanics of the Czech Academy of Sciences, 182 00 Prague, Czech Republic
3
Faculty of Mechanical Engineering, Czech Technical University, 160 00 Prague, Czech Republic
4
Faculty of Mechanical Engineering, West Bohemian University, 301 00 Pilsen, Czech Republic
*
Author to whom correspondence should be addressed.
This Paper is an Extended Version of Our Paper Published in Proceedings of the European Turbomachinery Conference ETC13, Lausanne, Switzerland, 8–12 April 2019, Paper No. 350.
Int. J. Turbomach. Propuls. Power 2019, 4(4), 33; https://doi.org/10.3390/ijtpp4040033
Received: 22 July 2019 / Revised: 6 September 2019 / Accepted: 6 September 2019 / Published: 24 September 2019
Recent trends in the electric energy market such as biomass, waste incineration or combined cycle power plants require innovative solutions in steam turbine design. Variable operating conditions cause significant changes in flow field surrounding the steam turbine last stage blades. Therefore, the enlargement of operating range for last stage blades presents new challenges in design of turbine cascades. Several turbine cascades were designed and analyzed by commercial and in-house software of CTU Prague. Selected profiles were experimentally validated in the high-speed wind tunnel for 2D cascade measurements of the Institute of Thermomechanics of the Czech Academy of Sciences which is equipped by an adjustable supersonic inlet nozzle, perforated inserts at side walls and adjustable perforated tailboard. Comparisons are presented of numerical results with optical and pneumatic measurements for a wide range of inlet and outlet Mach numbers for optimized hub and tip profile cascades. View Full-Text
Keywords: turbine; cascade; last stage blade; CFD; experimental validation turbine; cascade; last stage blade; CFD; experimental validation
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Novak, O.; Bobcik, M.; Luxa, M.; Fort, J.; Rudas, B.; Synac, J.; Simurda, D.; Furst, J.; Halama, J.; Hric, V.; Prihoda, J.; Simka, Z. Turbine Cascades of Last Stage Blades for Wide Range of Operating Conditions. Int. J. Turbomach. Propuls. Power 2019, 4, 33.

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