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The influence of stator-rotor interspace overlap of meridional contours on the efficiency of high-pressure steam turbine stages

Rusanov, Andrii ; Rusanov, Roman

Archives of thermodynamics, 2021-01, Vol.42 (1), p.97 [Revista revisada por pares]

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Título:
The influence of stator-rotor interspace overlap of meridional contours on the efficiency of high-pressure steam turbine stages
Autor: Rusanov, Andrii ; Rusanov, Roman
Materias: Caverns ; Contours ; Efficiency ; High pressure ; Rotor blades ; Rotor blades (turbomachinery) ; Stators ; Steam electric power generation ; Steam turbines
Es parte de: Archives of thermodynamics, 2021-01, Vol.42 (1), p.97
Descripción: The results of a systematic study of the influence of meridional contours overlap in the stator-rotor axial interspace of the impulse and reactive type stages of a high-pressure steam turbine on the flow structure and gas-dynamic efficiency of the flow part are introduced. The studied flow parts of the impulse and reactive stages are typical for high-power high-pressure steam turbines. It is shown that the stages that have no overlaps and/or have a smooth shape of meridional contours have the best gasdynamic efficiency, and the most negative effect on the flow part is caused by the presence of caverns in the stator-rotor interspace. For cases where, due to technological limitations, it is impossible to avoid the presence of caverns and overlaps with a sharp (step-wise) change in the shape of the meridional contours, it is recommended to perform overlaps with positive size of overlap values near the rotor blades.
Editor: Warsaw: Polish Academy of Sciences
Idioma: Polaco;Inglés

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