Verluste bei teilbeaufschlagten Turbinen

Dibelius, Günther; Schumacher, Volker

doi:10.1007/978-3-322-88291-2

Cited by 1 publication

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“…Referring to Dibelius & Schumacher (1975), the performance of the stage P t follows eq. ( 2), where P t, 100 is the performance of the stage under full admission and P t, loss comprises all loss mechanisms dealt by partial admission.…”

Section: Instrumentation and Principlesmentioning

confidence: 99%

Experimental investigation on performance of a control stage turbine under partial admission

Berger¹,

Polklas²,

Brunn³

et al. 2019

European Conference on Turbomachinery Fluid Dynamics and Hermodynamics

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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.

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Section: Instrumentation and Principlesmentioning

confidence: 99%