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Quantitative analysis of energy loss and vibration performance in a circulating axial pump

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  • Pu, Kexin
  • Huang, Bin
  • Miao, Hongjiang
  • Shi, Peili
  • Wu, Dazhuan

Abstract

The influence of vortex on steady flow and pressure fluctuation of circulating axial pump under pump condition is illustrated by numerical method validated by experiment measurement, a method for analyzing vibration by using Euler head density function (EHDF) is established. Based on the matching equation of the flowing angle of impeller and guide vane, two groups of guide vanes are designed to relate the same impeller as comparison. When the stagnation point at the guide vane inlet is offset, the low-speed vortex (LSV) is generated in the area from the mid flow surface to the hub surface, where the local Euler head (LEH) curves’ distribution is disarranged and the EHDF of this part is larger and closes to the EHDF value of the whole spanwise region, furthermore, the pressure fluctuation levels of low frequency band here deteriorate seriously. The larger EHDF value means the flow state and pressure fluctuation are worse, and the mainly developing of LSV is in this problematical area where the EHDF value has deteriorated the most. With quantizing image analysis of vorticity and LEH of the circulating pump by the EHDF, the structure position of LSV can be analyzed and the vibration level can be predicted.

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  • Pu, Kexin & Huang, Bin & Miao, Hongjiang & Shi, Peili & Wu, Dazhuan, 2022. "Quantitative analysis of energy loss and vibration performance in a circulating axial pump," Energy, Elsevier, vol. 243(C).
    • Handle: RePEc:eee:energy:v:243:y:2022:i:c:s0360544221030024
    DOI: 10.1016/j.energy.2021.122753
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    1. Yue Li & Yiwei Song & Shengsheng Xia & Qiang Li, 2022. "Influence of Guide Vane Slope on Axial-Flow Hydraulic Performance and Internal Flow Characteristics," Energies, MDPI, vol. 15(17), pages 1-10, August.

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