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Characterization of the effects of ingested bodies on the rotor–stator interaction of hydraulic turbines

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Energies 14 (2021) 06669.pdf (12,16Mb)
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Guardo Zabaleta, Alfredo de JesúsMés informacióMés informacióMés informació
Fontanals García, AlfredMés informacióMés informacióMés informació
Egusquiza Montagut, MònicaMés informacióMés informacióMés informació
Valero Ferrando, Ma. del CarmenMés informacióMés informacióMés informació
Egusquiza Estévez, EduardMés informacióMés informacióMés informació
Document typeArticle
Defense date2021-10-14
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Runner and distributor blockages in hydraulic turbines occur due to the ingestion of external bodies such as rocks or logs. These obstructions can change the amplitude and uniformity of the pressure pulsations in the machine, creating large unbalanced forces that can lead to reduced efficiency, increased vibration and mechanical damage. In this paper, the effects of obstructions caused by ingested bodies in the runner and the distributor of a pump turbine on its internal pressure pulsation were investigated by means of computational fluid dynamics. A numerical model of an unobstructed pump turbine is presented and validated against experimental data. Several cases of runner or distributor blockage were studied, and their RSI pressure pulsations were recorded and analyzed at different locations. The results obtained allow us to characterize the effect of these blockages on the machine’s RSI, which can be helpful for the correct diagnosis of these types of damage.
CitationGuardo, A. [et al.]. Characterization of the effects of ingested bodies on the rotor–stator interaction of hydraulic turbines. "Energies", 14 Octubre 2021, vol. 14, núm. 20, p. 1-16. 
URIhttp://hdl.handle.net/2117/356668
DOI10.3390/en14206669
ISSN1996-1073
Publisher versionhttps://www.mdpi.com/1996-1073/14/20/6669
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  • Departament de Mecànica de Fluids - Articles de revista [344]
  • FLUIDS - Enginyeria de Fluids - Articles de revista [75]
  • CDIF - Centre de Diagnòstic Industrial i Fluidodinàmica - Articles de revista [55]
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