Influence of Guide Vane Slope on Axial-Flow Hydraulic Performance and Internal Flow Characteristics

Yue Li, Yiwei Song, Shengsheng Xia and Qiang Li
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Yue Li: Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
Yiwei Song: School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
Shengsheng Xia: School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
Qiang Li: School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China

Energies, 2022, vol. 15, issue 17, 1-10

Abstract: To comprehensively study the influence of the guide vane inlet slope on the axial-flow pump, eight groups of axial-flow pumps with different guide vane inlet slopes are designed and studied in this paper. Four groups of schemes increase the relative slope at the rim of the guide vane blade, and the other four groups increase the relative slope at the hub. Numerical simulations have been verified experimentally and show good simulation accuracy. The numerical simulation results show that reducing the hub height of the guide vane can improve the head and efficiency of the axial-flow pump. Compared with the original scheme, the scheme H2/S2 is more stable in velocity and turbulent kinetic energy and has fewer vortices and low-speed areas at the guide vane. The scheme H3/S3 also exhibits excellent hydraulic performance and internal flow characteristics. It is recommended that when designing an axial-flow pump, the distance between the impeller and the guide vane at the hub can be appropriately larger than the distance between the impeller and the guide vane at the rim. This helps to reduce the velocity circulation at the outlet of the guide vane and improve the head and efficiency of the axial-flow pump.

Keywords: guide vane slope; axial-flow pump; hydraulic performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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