水力发电学报2017，Vol.36Issue(5)：88-94,7.DOI:10.11660/slfdxb.20170510
泥沙直径和浓度对混流式水轮机转轮内流场的影响
Influence of particle diameters and concentration of sediment on internal flows in Francis turbine runners
摘要
Abstract
This paper reports full-passage numerical simulations of a high-head Francis turbine using a solid-liquid two-phase flow model to preliminarily study the influence of particle diameters and concentration of sediment on the internal flow and performance of the turbine runner.The effects on sediment concentration distribution and mean pressure on the runner blades as well as on turbine efficiency were examined using a single variable method.Results show that relative to the flow of clean water,sediment in the flow causes an increase in pressure load on the blades and a decrease in turbine efficiency to a certain extent.Under the same operating conditions,higher sediment concentration appears around the inflow and outflow edges of the blade and near its joint with bottom outlet ring.When its particle diameters increase,sediment tends to be more concentrated and hence its abrasion is intensified.关键词
泥沙/数值模拟/转轮/高水头混流式水轮机Key words
sediment/numerical simulation/runner/high-head Francis turbine分类
能源科技引用本文复制引用
廖姣,赖喜德,张兴..泥沙直径和浓度对混流式水轮机转轮内流场的影响[J].水力发电学报,2017,36(5):88-94,7.基金项目
国家自然科学基金(51379179) （51379179）
西华大学研究生创新基金(ycjj2016198) （ycjj2016198）
流体及动力机械四川省科技创新研究团队(2011JTD0016) （2011JTD0016）
