Title: | Experimental investigation on performance of a control stage turbine under partial admission | Authors: | Berger, Antonio Polklas, Thomas Brunn, Oliver Joos, Franz |
Language: | eng | Keywords: | Partial Admission;Steam Turbine | Issue Date: | Apr-2019 | Document Type: | Article | Conference: | 13th European Turbomachinery Fluid Dynamics and Thermodynamics 2019 | Abstract: | Operation of industrial steam turbines under partial admission is usually implemented in order to cope with fluctuations in demand while maintaining a high efficiency. Subject of the article presented is the experimental investigation of the performance and efficiency of a control stage operated with air, under partial admission. Furthermore, the steady state blade loading distribution on the stator in a free passage and at the entry into a not admitted passage is observed. For the experiment, the single-staged axial-flow turbine is operated with varying shaft speed, pressure ratio and admission rate, realized by flow blockaging. Two rotationally symmetric stator endwall designs are tested: a plane and a contoured endwall. Reducing the admission rate at part load decreases the efficiency, especially at high circumferential velocities as precedent investigations showed. Pumping and mixing loss behaviour shows a different scale across the performance map. To prove CFD Simulations, results of the blade loading distribution on the stator are acquired. |
Organization Units (connected with the publication): | Strömungsmaschinen in der Energietechnik Bundesministerium für Wirtschaft und Energie (BMWi) |
Publisher DOI: | 10.29008/ETC2019-135 |
Appears in Collections: | 3 - Publication references (without fulltext) |
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