Numerical Simulation of Blade Channel Vortex in a Low Head Francis Turbine

Zhang, Hong Ming; Zhang, Li Xiang

doi:10.4028/www.scientific.net/amm.291-294.1958

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Xiao Yexiang et al took a numerical analysis of blade channel vortex in Francis turbine at part load, they investigated the characteristics of the unsteady flow dominant frequencies at different monitored points and concluded the dominant frequencies of blade channel vortex were a low frequency [2]. Zhang Hongming et al present numerical simulation of blade channel vortex in a low head Francis turbine using OpenFoam code, the simulation results have shown that using cavitation model to analyze blade channel vortex is very effective [3]. A 2D numerical simulations of blade-vortex interaction in a darrieus turbine is given for instance by Amet E. et al [4], and the results are compared qualitatively with the visualization of the vortex shedding of Brochier.…”

Section: Introductionmentioning

confidence: 99%

Flow characteristics on the blade channel vortex in the Francis turbine

Guo

Wang

Luo

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Depending on the long-term hydraulic development of Francis turbine, the blade channel vortex phenomenon was investigated systematically from hydraulic design, experimental and numerical computation in this paper. The blade channel vortex difference between the high water head and low water head turbine was also analyzed. Meanwhile, the relationship between the blade channel vortex and the operating stability of hydraulic turbine was also investigated. The results show that the phenomenon of blade channel vortex is an intrinsic property for Francis turbine under small flow rate condition, the turning-point of the blade channel vortex inception curve appears at low unit speed region, and the variation trend of the blade channel vortex inception curve is closely related to the blade inlet edge profile. In addition to, the vortex of the high water head turbine can generally be excluded from the stable operation region, while which is more different for the one of the low water head turbine.

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Section: Introductionmentioning

confidence: 99%