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.
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.
出处
《华北水利水电学院学报》
2012年第2期1-5,共5页
North China Institute of Water Conservancy and Hydroelectric Power
基金
国家自然科学基金项目(5102114005)
华北水利水电学院高层次人才科研启动基金项目
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
flow field around the H-section
Reynoids Averaged Navior-Stokes model
three dimensional Large Eddy Simulation（3D-LES）
particle image velocimetry
vortex
