Study on the Effect of the Guide Vane Opening on the Band Clearance Sediment Erosion in a Francis Turbine

Song, Xijie; Zhou, Guiyao; Song, Huating; Deng, Jian; Wang, Zhengwei

doi:10.3390/jmse10101396

Cited by 6 publications

(1 citation statement)

References 23 publications

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“…Lama and Gautam [6][7] conducted a numerical prediction on the sediment wear of Francis turbine under different operating conditions, and discussed the runner optimization strategy for a Francis turbine to maximize machine efficiency and minimize sediment wear. Song [8] simulated the solid-liquid two-phase flow in the full-flow passage of a Francis turbine and investigated the effect of the guide vane opening on the particle motion in the main flow passage using the Tabakoff erosion model. Jin [9] analyzed the solid-liquid phase flow in the vaneless zone under different guide vane openings, and determined the effect of particle concentration on wear.…”

Section: Introductionmentioning

confidence: 99%

PIV experimental study on water-sediment two-phase flow in NACA0012 cascade

Zhu,

Liu,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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Sediment wear is one of the important reasons for the damage of hydraulic machinery components, and the motion characteristics of sediment are the key factors to determine the degree of wear damage. In order to reveal the mechanism of sediment wear of turbine guide vane, motion characteristics of sediment near the wall of NACA0012 cascade were studied by PIV test method. In this research, fluorescent and sediment particles were used as tracer particles respectively, and the particle images of solid and liquid phases were recorded by double-camera synchronous imaging method. Finally, the synchronous velocity field of solid and liquid phases was determined by correlation analysis of particle images. The experimental results show that the PIV test method can accurately determine the motion characteristics of the solid phase. There is velocity slip between the solid phase and the liquid phase, and the velocity deviation is related to the factors of particle characteristics and Reynolds number.

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Section: Introductionmentioning

confidence: 99%

PIV experimental study on water-sediment two-phase flow in NACA0012 cascade

Zhu,

Liu,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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Analysis on cause of erosion of guide vane of high‐head Francis turbine in sandy river

Wang,

Pang,

Liu

et al. 2024

Energy Science & Engineering

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The Kizilsu River Basin in China is located in the desert Gobi area with high sediment content and high hardness. After 4798h operation, the maintenance of a high‐head Francis turbine in this basin found that the guide vane was seriously worn, and even most of the top and lower skirts of the front of the guide vane were worn off. In this study, the k‐ε turbulence model, ZGB cavitation model and sediment erosion prediction model were used to simulate the solid‐liquid two‐phase flow and cavitation of guide vane. The research results show that the guide vane of a high‐head Francis turbine in a sandy river has a high sediment velocity and serious surface erosion, with the maximum erosion rate of 1.0 × 10−6 kg/(m2·s), while the area near the skirt of the guide vane is a low‐pressure area lower than the saturated steam pressure, and cavitation is very easy to occur, with the maximum vapor volume fraction of 0.9. Serious cavitation erosion occurs near the skirt of the guide vane, and the combined effect of sand erosion and cavitation erosion on the surface of the skirt of the guide vane aggravates the damage of the skirt structure. The research results provide a technical basis for the antiabrasion design of the guide mechanism of the high‐head Francis turbine and the operation and maintenance of the hydropower station in the sandy river.

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