Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method

Cavitation can reduce the efficiency and service life of the centrifugal pumps, and a long-term operation under cavitation conditions will cause cavitation damage on the surface of material. The external characteristic test of the IS65-50-174 single-stage centrifugal pump was carried out. Moreover,...

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Autores principales:	Han Zhu, Ning Qiu, Chuan Wang, Qiaorui Si, Jie Wu, Fanjie Deng, Xiang Liu
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Microscopy QH201-278.5
Acceso en línea:	https://doaj.org/article/23e19b51cb564fd7bf81713785241eeb
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spelling	oai:doaj.org-article:23e19b51cb564fd7bf81713785241eeb2021-11-29T00:56:11ZPrediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method1932-874510.1155/2021/6498451https://doaj.org/article/23e19b51cb564fd7bf81713785241eeb2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/6498451https://doaj.org/toc/1932-8745Cavitation can reduce the efficiency and service life of the centrifugal pumps, and a long-term operation under cavitation conditions will cause cavitation damage on the surface of material. The external characteristic test of the IS65-50-174 single-stage centrifugal pump was carried out. Moreover, the cavitation mechanism under specific conditions was analyzed by numerical simulation. Considering the macroscopic cavitation flow structure in the centrifugal pump, three different cavitation erosion prediction methods were used to predict the erodible areas. The results show that the calculation results obtained by the density correction method (DCM) can well match the flow characteristics of the centrifugal pump under the rated conditions. When the centrifugal pump head drops by 3%, cavitation mainly occurs on the suction surface, and the cavity on the pressure surface is mainly concentrated near the front cover. The cavitation prediction method based on the time derivation of pressure change is not suitable for centrifugal pumps, while the prediction result of the erosive power method is more reasonable than the others. At time 0.493114 s, the maximum erosive power appears on the blade near the volute tongue, and its value is 1.46e−04 W.Han ZhuNing QiuChuan WangQiaorui SiJie WuFanjie DengXiang LiuHindawi-WileyarticleMicroscopyQH201-278.5ENScanning, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Microscopy QH201-278.5
spellingShingle	Microscopy QH201-278.5 Han Zhu Ning Qiu Chuan Wang Qiaorui Si Jie Wu Fanjie Deng Xiang Liu Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method
description	Cavitation can reduce the efficiency and service life of the centrifugal pumps, and a long-term operation under cavitation conditions will cause cavitation damage on the surface of material. The external characteristic test of the IS65-50-174 single-stage centrifugal pump was carried out. Moreover, the cavitation mechanism under specific conditions was analyzed by numerical simulation. Considering the macroscopic cavitation flow structure in the centrifugal pump, three different cavitation erosion prediction methods were used to predict the erodible areas. The results show that the calculation results obtained by the density correction method (DCM) can well match the flow characteristics of the centrifugal pump under the rated conditions. When the centrifugal pump head drops by 3%, cavitation mainly occurs on the suction surface, and the cavity on the pressure surface is mainly concentrated near the front cover. The cavitation prediction method based on the time derivation of pressure change is not suitable for centrifugal pumps, while the prediction result of the erosive power method is more reasonable than the others. At time 0.493114 s, the maximum erosive power appears on the blade near the volute tongue, and its value is 1.46e−04 W.
format	article
author	Han Zhu Ning Qiu Chuan Wang Qiaorui Si Jie Wu Fanjie Deng Xiang Liu
author_facet	Han Zhu Ning Qiu Chuan Wang Qiaorui Si Jie Wu Fanjie Deng Xiang Liu
author_sort	Han Zhu
title	Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method
title_short	Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method
title_full	Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method
title_fullStr	Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method
title_full_unstemmed	Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method
title_sort	prediction of cavitation evolution and cavitation erosion on centrifugal pump blades by the dcm-rng method
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/23e19b51cb564fd7bf81713785241eeb
work_keys_str_mv	AT hanzhu predictionofcavitationevolutionandcavitationerosiononcentrifugalpumpbladesbythedcmrngmethod AT ningqiu predictionofcavitationevolutionandcavitationerosiononcentrifugalpumpbladesbythedcmrngmethod AT chuanwang predictionofcavitationevolutionandcavitationerosiononcentrifugalpumpbladesbythedcmrngmethod AT qiaoruisi predictionofcavitationevolutionandcavitationerosiononcentrifugalpumpbladesbythedcmrngmethod AT jiewu predictionofcavitationevolutionandcavitationerosiononcentrifugalpumpbladesbythedcmrngmethod AT fanjiedeng predictionofcavitationevolutionandcavitationerosiononcentrifugalpumpbladesbythedcmrngmethod AT xiangliu predictionofcavitationevolutionandcavitationerosiononcentrifugalpumpbladesbythedcmrngmethod
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Prediction of Cavitation Evolution and Cavitation Erosion on Centrifugal Pump Blades by the DCM-RNG Method

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