排灌机械工程学报Issue(7)：600-605,6.DOI:10.3969/j.issn.1674-8530.14.0001
水动冷却塔直驱混流式水轮机转轮数值模拟优化
Numerical simulation and hydrodynamics optimization of direct-drive Francis turbine runner in cooling towers
摘要
Abstract
For a Francis turbine with a specific speed of just ns=54 used in cooling towers,six design parameters of runner such asβ1 ,β2 ,b0/D1 ,Φ/D1 ,Z and a/D1 which may have effects on the turbine performance are selected,then eight design cases are generated by using orthogonal experimental design array L8 (27)in which there are two levels for each factor.The steady 3D turbulent incompressible fluid flow is simulated for each design by means of a CFD package,consequently the hydraulic loss characte-ristics of the runners are analyzed,and the design parameters are optimized.The performance of the op-timized runner is predicted and measured.The predicted output power and efficiency of the turbine with the optimized runner are 1 56.57 kW and 86.51% respectively at the design point (Q=5 000 t/h), showing just 0.1 1%lower than the measurement of efficiency.This suggests that orthogonal design array combined with CFD technique can help reduce the number of design cases and improve the hydraulic performance of turbine runner effectively so as to realize its hydrodynamics optimization.关键词
转轮/水动冷却塔/混流式水轮机/L8 (2 7 )正交表/数值模拟/外特性试验Key words
runner/cooling tower/francis turbine/L8 (27 )/numerical simulation分类
农业科技引用本文复制引用
陈洋,周大庆,李玲玉,陈世凡..水动冷却塔直驱混流式水轮机转轮数值模拟优化[J].排灌机械工程学报,2014,(7):600-605,6.基金项目
国家自然科学基金资助项目 （）
