摘要
为了研究旋转圆柱的三维流场和受力特性,本文采用沉浸边界-格子玻尔兹曼方法(IB-LBM),对均匀来流条件下旋转圆柱进行了数值模拟,分析了不同相对转速和雷诺数的影响。结果表明旋转作用使尾涡与流动方向之间产生一定夹角,相对转速的增大致使停滞点向上移动,并且影响柱体周围流速的损失。相对转速在1~2存在临界点,临界点前后速度波动范围发生改变。雷诺数能改变正负涡的脱落状态,增加柱体尾涡的三维性,并对升阻力产生相反的影响。计算结果验证了IB-LBM在处理旋转问题时的可行性,当前结果与文献中的结果相吻合。
To study the three-dimensional flow field and forces of a rotating cylinder,the flow behind a rotating circular cylinder with the uniform flow was numerically studied based on immersed boundary-lattice Boltzmann method(IB-LBM).The effects of different relative rotation rates and the flow Reynolds number were analyzed.The results show that rotating effect can make the direction of vortex shedding have an included angle with the flow direction.The increased rotation rate caused the stagnation point to move upward and affected the flow velocity around the cylinder.A relative rotation speed existed at a critical point between 1 and 2,and changes occurred in the range of velocity fluctuation around the critical point.The Reynolds number can change the state of positive and negative vortex shedding,increase the three-dimensional characteristic of the cylinder′s trailing vortex,and cause an opposite influence on the drag and lift coefficients.The calculation results show the feasibility of IB-LBM in dealing with rotating problems,consistent with the findings in relevant literature.
作者
郭春雨
宋妙妍
常欣
王恋舟
薛嵘
GUO Chunyu;SONG Miaoyan;CHANG Xin;WANG Lianzhou;XUE Rong(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2019年第12期1943-1950,共8页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51209048,41176074,51409063)
工信部高技术船舶科研项目(G014613002)
装备预先研究项目(41407010501)
关键词
旋转圆柱
漩涡脱落
三维效应
格子玻尔兹曼
沉浸边界法
升阻力系数
压力系数
功率谱
rotating cylinder
vortex shedding
three-dimensional effect
lattice Boltzmann method
immersed boundary method
lift and drag coefficient
pressure coefficient
power spectrum
