人民长江2017，Vol.48Issue(7)：83-87,5.DOI:10.16232/j.cnki.1001-4179.2017.07.018
高水头混流式水轮机内部固液两相流数值分析
Numerical analysis of internal solid-liquid two-phase flow in high-head Francis turbine
摘要
Abstract
To study the influence of sediment diameter on the internal flow field in volute and water-guide apparatus of Francis turbines, the solid-liquid two phase flow model was used to simulate the whole flow passage of the high-head Francis turbine in a hydropower station.The single variable method was adopted to study the effect of inflow sediment with different diameter on the internal pressure and sediment distribution in volute and water-guide apparatus.The results show that sediment-laden flow, compared with clean water, increases the internal water pressure load in volute and water-guide apparatus to different degrees.Under the same operating condition,sediment concentration is high at the bottom and nose of the volute as well as at the head of the stationary guide vane and moving guide vane.The distribution of sediment with small diameter is even, but as the sediment diameter increases, the sediment concentration gradient becomes larger and the sediment is more concentrated, which will intensify the wear of components.The study can provide reference for the design of turbine operating under sediment-laden flow condition.关键词
泥沙/数值模拟/蜗壳/导水机构/高水头混流式水轮机Key words
sediment/numerical simulation/volute/water-guide apparatus/high-head Francis turbine分类
建筑与水利引用本文复制引用
廖姣,张兴,张文明..高水头混流式水轮机内部固液两相流数值分析[J].人民长江,2017,48(7):83-87,5.基金项目
国家自然科学基金项目(51379179) （51379179）
西华大学研究生创新基金资助项目(ycjj2016198) （ycjj2016198）
四川省科技计划项目(2017JY0047) （2017JY0047）
