Cavitation has bothered the hydraulic machinery for centuries, especially in pumps. It is essential to establish a solid way to predict the unsteady cavitation evolution with considerable accuracy. A novel cavitation model was proposed, considering the rotating motion characteristic of centrifugal pump. Comparisons were made with three other cavitation models and validated by experiments. Considerable agreements can be noticed between simulations and tests. All cavitation models employed have similar performance on predicting the pump head drop curve with proper empirical coefficients, and also the unsteady cavitation evolution was well solved. The proposed rotating corrected-based cavitation model (rotating based Zwart-Gerber-Belamri (RZGB)) obtained identical triangle cavity structure with the experiment visualizations, while the others also got triangle structure but with opposite direction. The maximum flow velocity in the impeller passage appears near the shroud, contributing to the typical triangle cavity structure. A preprocessed method for instant rotating images was carried out for evaluating the erosion risk area in centrifugal pump, based on the standard deviation of gray level. The results imply that the unsteady rear part of the attached cavity is vulnerable to be damaged, where the re-entrant flow was noticed. This work presented a suitable cavitation model and reliable numerical simulation approach for predicting cavitating flows in centrifugal pump.
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November 2018
Research-Article
Rotating Corrected-Based Cavitation Model for a Centrifugal Pump
Wang Jian,
Wang Jian
School of Shipping and
Mechatronic Engineering,
Taizhou University,
Taizhou 225300, China
e-mail: arieskin@126.com
Mechatronic Engineering,
Taizhou University,
Taizhou 225300, China
e-mail: arieskin@126.com
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Wang Yong,
Wang Yong
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: wylq@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: wylq@ujs.edu.cn
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Liu Houlin,
Liu Houlin
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: liuhoulin@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: liuhoulin@ujs.edu.cn
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Si Qiaorui,
Si Qiaorui
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: siqiaorui@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: siqiaorui@ujs.edu.cn
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Matevž Dular
Matevž Dular
Laboratory for Water and Turbine Machines,
University of Ljubljana,
Ljubljana 1000, Slovenia
e-mail: matevz.dular@fs.uni-lj.si
University of Ljubljana,
Ljubljana 1000, Slovenia
e-mail: matevz.dular@fs.uni-lj.si
Search for other works by this author on:
Wang Jian
School of Shipping and
Mechatronic Engineering,
Taizhou University,
Taizhou 225300, China
e-mail: arieskin@126.com
Mechatronic Engineering,
Taizhou University,
Taizhou 225300, China
e-mail: arieskin@126.com
Wang Yong
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: wylq@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: wylq@ujs.edu.cn
Liu Houlin
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: liuhoulin@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: liuhoulin@ujs.edu.cn
Si Qiaorui
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: siqiaorui@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: siqiaorui@ujs.edu.cn
Matevž Dular
Laboratory for Water and Turbine Machines,
University of Ljubljana,
Ljubljana 1000, Slovenia
e-mail: matevz.dular@fs.uni-lj.si
University of Ljubljana,
Ljubljana 1000, Slovenia
e-mail: matevz.dular@fs.uni-lj.si
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received October 9, 2017; final manuscript received April 17, 2018; published online May 18, 2018. Assoc. Editor: Samuel Paolucci.
J. Fluids Eng. Nov 2018, 140(11): 111301 (8 pages)
Published Online: May 18, 2018
Article history
Received:
October 9, 2017
Revised:
April 17, 2018
Citation
Jian, W., Yong, W., Houlin, L., Qiaorui, S., and Dular, M. (May 18, 2018). "Rotating Corrected-Based Cavitation Model for a Centrifugal Pump." ASME. J. Fluids Eng. November 2018; 140(11): 111301. https://doi.org/10.1115/1.4040068
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