亚临界雷诺数下串列双波浪锥柱绕流数值模拟  

Numerical simulation of flow around two tandem wavy conical cylinders at subcritical Reynolds number

作　　者：邹琳[1] 吴伟男 刘健 柳迪伟 王家辉 ZOU Lin;WU Weinan;LIU Jian;LIU Diwei;WANG Jiahui(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430000,China)

机构地区：[1]武汉理工大学机电工程学院,武汉430000

出　　处：《北京航空航天大学学报》2024年第3期706-715,共10页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(11972268)。

摘　　要：针对风力俘能结构布局问题,基于大涡模拟(LES)方法,在亚临界雷诺数下(Re=3900)研究有限长串列双波浪锥柱的升阻力特性及其流动结构随间距比的变化规律。结果表明:由于上游波浪锥柱的影响,下游波浪锥柱的脉动升力系数大幅增大,当间距比为3时,表面时均压力系数分布形式呈反向分布;随间距比增加,上游波浪锥柱尾流充分发展,并产生大量肋状涡撞击在下游波浪锥柱表面,下游波浪锥柱产生大的脉动升力,相较于单直圆柱提升约15.3倍,阻力系数降低约0.172。所得结果可为风力俘能结构布局提供有益参考。Regarding the arrangement of wind energy harvesting structures,based on the large eddy simulation(LES)method,the lift-drag characteristics and flow structures of two tandem wavy conical cylinders are studied with a subcritical Reynolds number(Re=3900)and the spacing ratio.Results show that due to the influence of the upstream wavy conical cylinder,the fluctuating lift coefficients of the downstream wavy conical cylinder increase substantially.When the spacing ratio is 3,the distribution form of the time-averaged pressure coefficient is different from that of other spacing ratios,showing a reverse distribution.With the increasing spacing ratio,a large number of rib vortices are generated after the wake of the upstream wavy conical cylinder is fully developed,causing impact on the surface of the downstream wavy conical cylinder and generating a large fluctuating lift.Compared with the single straight cylinder,the two tandem wavy conical cylinders increase the fluctuating lift coefficient by about 15.3 times,and reduce the drag coefficient by about 0.172.These results can provide a useful reference for the arrangement of wind energy harvesting structures.

关 键 词：串列双波浪锥柱 间距比 升阻力特性 流动结构 大涡模拟 

分 类 号：O357.1[理学—流体力学]