| H型断面周围流场的粒子图像测速试验及数值模拟 |
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| 引用本文： | 刘祖军,贾明晓,杨詠昕.H型断面周围流场的粒子图像测速试验及数值模拟[J].华北水利水电学院学报,2012,33(2):1-5. |
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| 作者姓名： | 刘祖军 贾明晓 杨詠昕 |
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| 作者单位： | 1. 华北水利水电学院,河南郑州,450011
2. 同济大学桥梁工程系,上海,200092 |
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| 基金项目： | 国家自然科学基金项目，华北水利水电学院高层次人才科研启动基金项目 |
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| 摘 要： | 采用粒子图像设备PIV(Particle Image Velocimetry)进行了雷诺数为9×104的H断面的绕流试验,揭示了作用在H型断面上的旋涡演化过程.选取基于雷诺时均方法(Reynolds Averaged Navier-Stokes Equations,RANS)的Realize k-e模型和三维大涡模型(3D-LES)这两种湍流模型进行了断面的绕流计算,并比较了数值计算结果与试验结果的差别.三维大涡模型能够充分地挖掘湍流信息,而Realize k-e模型的计算结果能够很好地体现旋涡的最主要特征,与试验结果吻合较好,在综合考虑计算的经济性和效率的前提下采用Realizek-e模型进行数值模拟能够满足工程应用的需求.
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| 关 键 词： | H型断面周围流场 雷诺时均湍流模型 三维大涡模型 粒子图像测试技术 旋涡 |
Study on Particle Image Velocimetry and Numerical Simulation of Flow Field around the H-section |
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| LIU Zu-jun
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JIA Ming-xiao
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YANG Yong-xin.Study on Particle Image Velocimetry and Numerical Simulation of Flow Field around the H-section[J].Journal of North China Institute of Water Conservancy and Hydroelectric Power,2012,33(2):1-5. |
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| Authors: | LIU Zu-jun JIA Ming-xiao YANG Yong-xin |
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| Affiliation: | 1.North China Institute of Water Conservancy and Hydroelectric Power,Zhengzhou 450011,China;2.Department of Bridge Engineering,Tongji University,Shanghai 200092,China) |
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| Abstract: | The experiment of vortex shedding from H-section with Reynolds number 9×104 is done by using particle image velocimetry(PIV).The experiment reveals the evolution of the vortex on the H-section.Realize k-e model and three dimensional Large Eddy Simulation model(3D-LES) are used to calculate the flow around the H-section.The result of calculation is compared with the experiment result,which reveals that the 3D-LES can excavate more information of the turbulent,but the Realize k-e model can well reflect the main characteristics of the vortex,and shows great agreement with the experiment result.Therefore,with the comprehensive consideration of economy and efficiency of the calculation,the Realize k-e model could meet the requirements of engineering applications. |
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| Keywords: | flow field around the H-section Reynoids Averaged Navior-Stokes model three dimensional Large Eddy Simulation(3D-LES) particle image velocimetry vortex |
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