| 混流式转轮中流场的大涡模拟 |
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| 引用本文： | 张昌兵,杨永全,鞠小明,桂林. 混流式转轮中流场的大涡模拟[J]. 水科学进展, 2002, 13(6): 675-681 |
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| 作者姓名： | 张昌兵 杨永全 鞠小明 桂林 |
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| 作者单位： | 四川大学水电学院,四川,成都,610065;四川大学水电学院,四川,成都,610065;四川大学水电学院,四川,成都,610065;四川大学水电学院,四川,成都,610065 |
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| 摘 要： | 建立了基于微可压缩流体理论的相对运动的大涡模拟方法,并对混流式转轮流场进行了三维非恒定粘性数值模拟,计算方法采用了有限体积法和预测-校正方法,对固体边壁的处理使用了“壁函数”法。得到了混流式转轮的三维速度场和压力分布,与k-ε模型计算结果进行比较表明,所建立的相对运动的大涡模拟方法对转轮性能预测更加精确、合理,对转轮改型设计具有十分重要的参考价值。
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| 关 键 词： | 大涡模拟 有限体积法 水轮机转轮 流场 |
| 文章编号： | 1001-6791(2002)06-675-07 |
| 收稿时间： | 2001-09-17 |
| 修稿时间： | 2001-09-17 |
Large eddy simulation of flow through francis turbine runner |
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| ZHANG Chang-bing,YANG Yong-quan,JU Xiao-ming,GUI Lin. Large eddy simulation of flow through francis turbine runner[J]. Advances in Water Science, 2002, 13(6): 675-681 |
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| Authors: | ZHANG Chang-bing YANG Yong-quan JU Xiao-ming GUI Lin |
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| Affiliation: | College of Hydraulic Engineering, Sichuan University, Chengdu 610065, China |
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| Abstract: | A large eddy simulation(LES)approach based on the weakly compressible hydrodynamic equation for the relative motion is developed in a rotational coordinate system,and employed in simulating 3-D flow through a francis turbine runner.The finite volume approach with predictor corrector method and a law of the wall for the solid wall condition are used.The velocity and pressure fields are obtained and compared with the computated results by the k-ε model,showing that the 3-D LES approach can give realistic results of the flow field. |
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| Keywords: | large eddy simulation finite volume approach turbine runner flow field |
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