【摘要】 为分析不同湍流模型下,水轮机蜗壳流场数值仿真精度的高低,对美国Applegate电站的混流式水轮机金属蜗壳展开了研究。在网格划分、壁面函数选择等相同设置条件下,分别选择标准k-ε、RNGk-ε以及Realizable k-ε湍流模型,进行流场分析和试验。对比仿真和试验数据可知,RNGk-ε湍流模型下,蜗壳的水力性能最好、计算精度最高。为水轮机流道CFD数值模拟中,湍流模型的合理确定,提供了参考依据。更多还原

【Abstract】 For analyzing the simulation precision of flow in spiral case with different turbulence conditions.This paper takes a spiral case of turbine in American power station called Applegate as an example.The paper chooses standard k-ε,RNGk-εand Realizable k-εmodel,do simulation and tests.Compared the results,we get the most accurate conclusions at RNGk-εmodel.Tt provides a basis for the choice of a reasonable turbulence model for flow simulation.更多还原