振荡流下双圆角柱体结构群绕流特性数值研究  

Numerical study on characteristics of two fillet cylinders in oscillatory flows

作　　者：涂佳黄[1] 王程 梁经群 文广龙 邓旭辉[1] TU Jia-huang;WANG Cheng;LIANG Jing-qun;WEN Guang-long;DENG Xu-hui(College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411105,China;Yongzhou Lingling Financial Investment Assessment Center,Yongzhou 425100,China)

机构地区：[1]湘潭大学土木工程与力学学院,湖南湘潭411105 [2]永州市零陵区财政投资评审中心,湖南永州425100

出　　处：《船舶力学》2022年第10期1445-1454,共10页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(51434002;11602214);湖南省自然科学基金资助项目(2020JJ4568;2021JJ50027);湖南省教育厅科学研究优秀青年项目(18B079);中国博士后科学基金资助项目(2017M622593)。

摘　　要：基于流体计算软件Fluent,对零均值振荡流(Re=160,KC=7)工况下双圆角柱体结构群绕流问题进行了研究。首先,对单柱体绕流进行求解以验证数值模型、计算参数的准确性;然后,着重分析布置方式、圆角半径和间距比对双圆角柱体结构群流场特性和流体力系数的影响。结果表明:三个关键参数的变化均会改变双圆角柱体结构群的流场分布和各柱体的流体力系数。在小间距工况下,圆角半径增大对各柱体的漩涡脱落模式无明显影响。然而,在大间距比工况下,各柱体的流体力系数会发生改变。另一方面,圆角半径增大均会导致各柱体的拖曳力系数和惯性力系数减少。同时,在任意圆角半径工况下,间距比增大会使得各柱体的流场分布和流体力系数发生较大变化。Based on the fluid computational software Fluent,the zero-mean oscillation flow around a struc⁃ture group of two fillet cylinders at Re=160,KC=7 was investigated.Firstly,in order to verify the accuracy of the numerical model and calculation parameters,the flow around the single cylinder immersed in the oscilla⁃tion flow was studied.Then,the influence of arrangement,fillet radius and spacing ratio on the flow field characteristics and fluid force coefficient of the two fillet cylinders was analyzed.The results show that the three key parameters have a great influence on the flow field distribution of the two fillet cylinders and the flu⁃id force coefficients of each fillet cylinder.In case of a small spacing ratio,the increase of the fillet radius has no significant effect on the vortex shedding pattern at the wake.However,in case of a large spacing ratio,the fluid force coefficients of each fillet cylinder change.On the other hand,the increase of the fillet radius gives rise to the decrease of the drag force coefficient and the inertial force.Meanwhile,the increase of the spacing ratio has a great influence on the flow field distribution and fluid force coefficient of each fillet cylinder in case of any fillet radius.

关 键 词：振荡流 圆角半径 间距比 流场特性 流体力系数 

分 类 号：O357.1[理学—流体力学]