层流状态下旋转圆柱绕流数值模拟研究  

Numerical Investigation of Laminar Flow past a Rotating Cylinder

作　　者：刘二朋 林永水[1] 池晴佳 陈威[2] 李晓彬[2] 吴卫国[3] LIU Er-peng;LIN Yong-shui;CHI Qing-jia;CHEN Wei;LI Xiao-bin;WU Wei-guo(School of Science,Wuhan University of Technology,Wuhan 430063,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Green and Smart River-Sea-Going Ship,Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学理学院,武汉430063 [2]武汉理工大学船海与能源动力工程学院,武汉430063 [3]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,武汉430063

出　　处：《船舶力学》2022年第12期1749-1761,共13页Journal of Ship Mechanics

基　　金：湖北省自然科学基金项目(2021CFB064);博士科研启动基金资助项目(WUT:40120268);国家自然科学基金资助项目(52201334)。

摘　　要：基于CFD方法对层流状态不同雷诺数下的旋转圆柱绕流进行数值模拟,分析在不同转速比α(0≤α≤8)下尾流涡流、升力系数、阻力系数和斯特劳哈尔数的特性。随着转速比的增大,发现五种尾流结构形态(漩涡脱落、稳定尾流、反向稳定尾流、单边涡和附着涡)。随着转速比的增大,平均升力系数先抛物线形式增大,然后线性增大,平均阻力系数减小,然后增大;斯特劳哈尔数随旋转比的增大而减小,且第二不稳定阶段的斯特劳哈尔数比第一不稳定阶段要小很多。随着雷诺数的增大,第一不稳定阶段的末尾向后移动,第二不稳定阶段的生成范围向前移动。The numerical investigation of laminar flow past a rotating cylinder under different Reynolds numbers is conducted by using the CFD method.The characteristics of wake vortex,lift coefficient,drag coefficient and Strouhal number at different rotation rates,have been analyzed.With the increase of rotation rate,five vortex formations(vortex shedding formation,steady wake formation,reversed steady wake formation,single vortex formation and cloth formation)are identified.The mean lift coefficient first increases parabolically and then increases linearly,the mean drag coefficient decreases,and then increases with the increase of rotation rate.The Strouhal number decreases with the increase of rotation rate,and the values for Strouhal number in the second instability stage are much smaller than those in the first instability stage.With the increase of Reynolds number,the end of the first instability stage moves backward and the generated range of the second instability moves forward.

关 键 词：旋转圆柱 数值模拟 水动力系数 尾流结构 旋转比 

分 类 号：TV131.2[水利工程—水力学及河流动力学]