来源:《Journal of Hydrodynamics》2018年第01期  作者:陈婷;郑祥豪;张宇宁;Shengcai Li;
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Influence of upstream disturbance on the draft-tube flow of Francis turbine under part-load conditions

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Owing to the part-load operations for the enhancement of grid flexibility, the Francis turbine often suffers from severe low-frequency and large-amplitude hydraulic instability, which is mostly pertinent to the highly unsteady swirling vortex rope in the draft tube. The influence of disturbances in the upstream(e.g., large-scale vortex structures in the spiral casing) on the draft-tube vortex flow is not well understood yet. In the present paper, the influence of the upstream disturbances on the(本文共计9页)......[继续阅读本文]

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