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Effect of Shear-Thinning Property on the Energy Performance and Flow Field of an Axial Flow Pump

Author

Listed:
  • Weihua Sun

    (School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)

  • Zhiyi Yu

    (School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
    State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China)

  • Wenwu Zhang

    (College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China)

Abstract

In the chemical and petroleum industry, the axial flow pump is widely used for the circulation pipeline system, and most of the transportation mediums are the shear-thinning non-Newtonian fluids. However, previous investigations on axial flow pumps are focused on water, which leads to a considerable deviation between the actual application and the research finding. In this work, shear-thinning non-Newtonian fluid (CMC solution) and viscous Newtonian fluid (the viscosity equals the apparent viscosity of CMC solution as the flow index is 1) are selected as the working medium. Based on the research output, lower apparent viscosity occurs in the near-wall and rotor–stator interaction region due to the larger velocity gradient. The shear-thinning property results in an increased tip leakage flow rate, and a sharp decline in friction loss. Compared to the viscous Newtonian fluid, the head and efficiency of the pump improves substantially for the shear-thinning fluid. The discrepancy is observed to increase with a higher flow rate. The comprehensive analysis of flow field and energy performance reveals that friction loss is still the main part of the total loss in the shear-thinning fluid.

Suggested Citation

  • Weihua Sun & Zhiyi Yu & Wenwu Zhang, 2022. "Effect of Shear-Thinning Property on the Energy Performance and Flow Field of an Axial Flow Pump," Energies, MDPI, vol. 15(7), pages 1-15, March.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:7:p:2341-:d:777824
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    References listed on IDEAS

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