| 超高水头混流式长短叶片转轮内部流动数值模拟 |
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| 引用本文： | 侯祎华,QI Xue-yi,齐学义,张静,敏政.超高水头混流式长短叶片转轮内部流动数值模拟[J].兰州理工大学学报,2009,35(2). |
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| 作者姓名： | 侯祎华 QI Xue-yi 齐学义 张静 敏政 |
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| 作者单位： | 兰州理工大学,流体动力与控制学院,甘肃,兰州,730050 |
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| 摘 要： | 对超高水头混流式长短叶片转轮内部流动进行数值模拟分析.计算基于连续方程和雷诺时均N-S方程,选用Spalart-Allmaras一方程湍流模型使方程组封闭,通过贴体坐标下的有限体积法对控制方程进行离散,数值求解采用SIMPLIC算法.通过计算得出不同工况下长短叶片转轮内部流动的速度及压力分布,发现不同工况下短叶片表面的压力分布规律与长叶片基本相同.与常规转轮叶片流场比较发现,在上冠流面和中间流面上二者有相似的翼型压力分布规律,而在下环流面上长短叶片转轮翼型表面压力分布要优于常规叶片转轮,因而具有更好的空蚀性能.
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| 关 键 词： | 混流式转轮 超高水头 长短叶片 Spalart-Allmaras湍流模型 数值模拟 |
Numerical simulation of internal flow in ultra-high head Francis runner with splitter blades |
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| HOU Yi-hua,QI Xue-yi,ZHANG Jing,MIN Zheng.Numerical simulation of internal flow in ultra-high head Francis runner with splitter blades[J].Journal of Lanzhou University of Technology,2009,35(2). |
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| Authors: | HOU Yi-hua QI Xue-yi ZHANG Jing MIN Zheng |
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| Institution: | Collage of Fluid Power and Control;Lanzhou Univ.of Tech.;Lanzhou 730050;China |
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| Abstract: | The internal flow in ultra-high head Francis runner with splitter blades was analyzed by means of numeric simulation.The calculation was based on the continuity equation,Navier-Stokes equation and Spalart-Allmaras turbulence model to make the equation group closed.The control equation was discretized and solved using by finite-volume method and SIMPLIC algorithm in attached coordinates.The distribution of velocity and pressure in the runner with splitter blades was evaluated.It was found that,for different ... |
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| Keywords: | Francis runner ultra-high head splitter blades Spalart-Allmaras turbulence model numerical simulation |
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