水利水电科技进展2012，Vol.32Issue(5)：20-23,51,5.DOI:10.3880/j.issn.1006-7647.2012.05.005
调压室阻抗孔修圆三维数值计算
Three-dimensional numerical simulation of impedance hole rounding on surge chamber
摘要
Abstract
The impedance hole rounding on surge chamber is numerically simulated by using the k-e turbulence mathematical model for the complementation of physical model tests. The inflow and outflow resistance coefficients at the junction rounding with different radii of the impedance hole with the bottom plate of surge chamber and the bottom flow conduits are obtained. The calculated flow pattern of surge chamber without impedance hole rounding is compared with the observed one. The results show that when the flows without impedance hole rounding go through the hole, a sudden flow contraction occurs, the flow velocity is uneven, faster in the middle but slower at the sides, and the resistance coefficient is relatively large. After the impedance hole rounding, the sudden contraction effect is significantly reduced, the flows are smooth and even, and the resistance coefficient obviously decreases. The impedance hole rounding optimizes and reduces the contraction losses and may effectively reduce the resistance coefficient so as to raise the discharge coefficient of the impedance hole.关键词
调压室/阻抗孔/阻抗系数/修圆优化/κ-ε紊流数学模型/三维数值计算Key words
surge chamber/ impedance hole/ rounding optimization/ resistance coefficient/ k-e turbulence mathematical model/ three-dimensional numerical simulation分类
建筑与水利引用本文复制引用
凡家异,鞠小明,陈云良,张玉润,吴旭敏..调压室阻抗孔修圆三维数值计算[J].水利水电科技进展,2012,32(5):20-23,51,5.基金项目
国家自然科学基金(51109149) （51109149）
教育部博士点基金(20110181120093) （20110181120093）
