矩形平板涡街分布特性分析  

The Analysis of Vortex Street Shedding from Rectangle Plate

作　　者：苏玉民 崔桐 闫岱峻 赵金鑫 鞠磊 

机构地区：[1]哈尔滨工程大学水下机器人技术国防科技重点实验室,哈尔滨150001

出　　处：《武汉理工大学学报》2012年第4期52-56,71,共6页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50879014)

摘　　要：基于有限体积法数值求解Navier-Stokes方程,分析了二维矩形平板的旋涡分布规律及斯特罗哈数特性与平板长宽比和雷诺数的关系,并探讨了平板升力系数变化规律。研究表明,层流状态下平板斯特罗哈数及平板附着涡分布与雷诺数和平板长宽比密切相关。当雷诺数为200时,斯特罗哈数随着平板长宽比的增加呈线性规律变化,平板两侧仅有两个附着涡;但当雷诺数为300时,平板附着涡数量取决于长宽比,而斯特罗哈数则呈跳跃性规律变化;结合Realiza-ble k-ε模型进行的湍流条件下的数值计算则表明高雷诺数下的平板两侧没有明显的附着涡产生,而斯特罗哈数则以长宽比8为分界点表现出不同的变化趋势。By numerically solving the Navier-Stokes equation based on the finite volume method,the relations between the vortex distributing regulation,Strouhal number characteristics and long-breadth ratio,Reynolds numbers for two-dimensional rectangle plate was analyzed,and the lift coefficient variety of the plate was also investigated.From the results,it is seen that Strouhal number and vortex distribution of the plate,for the laminar flow,have a close relation to its long-width ratio and Reynolds number.With Reynolds number reaching 200,Strouhal number changed in a linearity regulation along with the rise of long-width ratio,and there were only two vortexes on the plate＇s two sides.While,with Reynolds number reaching 300,the amount of vortexes lay on long-width ratio,and Strouhal number changed in a jumping regulation.Furthermore,from the numerical results based on the Realizable k-ε model,it is also clarified that there were no obvious vortexes on the plate＇s two sides,and Strouhal number varied in different trends with the long-width ratio on two sides equaling 8.

关 键 词：有限体积法 矩形平板 涡街 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]