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Weak compressibility effects on the pressure fluctuation at RSI in a highspeed centrifugal pump

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Abstract

This study presents large eddy simulation of high-speed centrifugal pump at approximate quarter load (0.23 Qd) and design load (Qd) conditions. Two liquid models, including weak compressible and incompressible assumptions, are considered to investigate the weak compressibility effects (WCE) on the pressure fluctuation at rotor-stator interaction (RSI). Researches show that the performance is slightly increased by the WCE at both the flow rates, which deviate from the experimental data within 5 %. There is a phase deviation between the pressure fluctuation of the two assumptions. The amplitudes of pressure fluctuation and pressure spectra are affected by the WCE, especially in the guide vane channel far away from the tongue. The first and second frequencies of pressure spectra are 12 and 6 times the rotation frequency, respectively, which are insensitive to the WCE. The influence of WCE on the pressure fluctuation and pressure spectra is significant at 0.23 Qd and gradually weakened at Qd.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant No. 51976198), the Key Research and Development Program of Zhejiang Province (Grant No. 2020C01163), the Zhejiang Provincial Natural Science Foundation of China (Grant No. LZ20E060002), and the Fundamental Research Funds of Zhejiang Sci-Tech University (Grant No. 2021Y001).

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Authors and Affiliations

  1. Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, 310018, P. R. China

    Shaolong Wang, Xiaoping Chen, Xiaojun Li, Baoling Cui & Zuchao Zhu

Authors
  1. Shaolong Wang
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  2. Xiaoping Chen
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  3. Xiaojun Li
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  4. Baoling Cui
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  5. Zuchao Zhu
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Corresponding author

Correspondence to Xiaoping Chen.

Additional information

Shaolong Wang is a Postgraduate Student at Zhejiang Sci-Tech University. His main areas of interest are high-speed centrifugal pump internal flow, turbulence, and computational fluid dynamics.

Xiaoping Chen is currently an Associate Professor at Zhejiang Sci-Tech University. He received his Ph.D. from University of Chinese Academy of Science in 2013. His main areas of interest are turbomachinery, turbulent flow and computational fluid dynamics.

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Wang, S., Chen, X., Li, X. et al. Weak compressibility effects on the pressure fluctuation at RSI in a highspeed centrifugal pump. J Mech Sci Technol 36, 5047–5057 (2022). https://doi.org/10.1007/s12206-022-0918-8

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  • DOI: https://doi.org/10.1007/s12206-022-0918-8

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