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Numerical analysis of cavitation within slanted axial-flow pump

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Abstract

In this paper, the cavitating flow within a slanted axial-flow pump is numerically researched. The hydraulic and cavitation performance of the slanted axial-flow pump under different operation conditions are estimated. Compared with the experimental hydraulic performance curves, the numerical results show that the filter-based model is better than the standard k - ε model to predict the parameters of hydraulic performance. In cavitation simulation, compared with the experimental results, the proposed numerical method has good predicting ability. Under different cavitation conditions, the internal cavitating flow fields within slanted axial-flow pump are investigated. Compared with flow visualization results, the major internal flow features can be effectively grasped. In order to explore the origin of the cavitation performance breakdown, the Boundary Vorticity Flux (BVF) is introduced to diagnose the cavitating flow fields. The analysis results indicate that the cavitation performance drop is relevant to the instability of cavitating flow on the blade suction surface.

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Authors and Affiliations

  1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, 200072, China

    Rui Zhang  (张睿)

  2. Shanghai Institute of Applied Mathematics and Mechanics and Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai, 200072, China

    Hong-xun Chen  (陈红勋)

Authors
  1. Rui Zhang  (张睿)
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  2. Hong-xun Chen  (陈红勋)
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Corresponding author

Correspondence to Hong-xun Chen  (陈红勋).

Additional information

Project supported by the Key Research Projects of Shanghai Science and Technology Commission (Grant No.10100500200), the Science and Technology Plan of Zhejiang Province (Grant No. 2011C11068) and the Shanghai Program for Innovative Research Team in Universities.

Biography: Zhang Rui (1984-), Male, Ph. D. Candidate

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Zhang, R., Chen, Hx. Numerical analysis of cavitation within slanted axial-flow pump. J Hydrodyn 25, 663–672 (2013). https://doi.org/10.1016/S1001-6058(13)60411-4

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  • DOI: https://doi.org/10.1016/S1001-6058(13)60411-4

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