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Numerical investigation on the transient characteristics of sediment-laden two-phase flow in a centrifugal pump

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Abstract

The objective of this work was to determine pressure fluctuation and transient flow characteristics, which aims to provide references to improve noise and vibration performance for the pump design and optimization when delivering sediment-laden flow. The three-dimensional (3D) transient simulations were simulated by SST k-ω turbulence model combined with Homogeneous equilibrium model (HEM). The experimental and numerical data was compared to validate the numerical accuracy. The simulation results predicted that the concentration shows strong effects on the external performance, velocity, pressure, turbulent kinetic energy distribution and peak amplitude of pulsation frequency, which all perform increasing trend with the rise of concentration. Meanwhile, the effect of the diameter size of particles on the flow field was relatively minor, which can also evidently influence the internal flow, but the effect is not simply proportional to the diameter size. The effect of diameter size on silt flow needs to be taken into account associated with the concentration distribution. The dominant frequency of solid-liquid approximately equals 0.8 times that of pure water, and the transient characteristics of sediment-laden flow perform low frequency with high amplitude features.

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Authors and Affiliations

  1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, 730050, China

    Weiguo Zhao & Guoshou Zhao

  2. Key Laboratory of Fluid Machinery and System, Gansu Province, Lanzhou, 730050, China

    Weiguo Zhao & Guoshou Zhao

Authors
  1. Weiguo Zhao
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  2. Guoshou Zhao
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Correspondence to Weiguo Zhao.

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Recommended by Associate Editor Weon Gyu Shin

Weiguo Zhao received his B.S. from Lanzhou University of Technology, China, in 2001 and fluid engineering M.S. in 2006 from Huazhong University of Science and Technology, Wuhan, China, then Ph.D. in fluid machinery from Zhejiang University in 2012, Hanzhou, China. He has been engaged in researches about design of pumps, stability analysis, flow investigation, multiphase flow and cavitation in sedimentladen flow, numerical simulation unsteady turbulent flow.

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Zhao, W., Zhao, G. Numerical investigation on the transient characteristics of sediment-laden two-phase flow in a centrifugal pump. J Mech Sci Technol 32, 167–176 (2018). https://doi.org/10.1007/s12206-017-1218-6

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  • DOI: https://doi.org/10.1007/s12206-017-1218-6

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