考虑流固耦合效应的圆柱尾板流场控制效果比较  

Comparison on Flow Field Control Effect of Cylindrical Splitter Plate Considering Fluid-structure Interaction Effect

作　　者：李江[1] 向斌 李春[2] LI Jiang;XIANG Bin;LI Chun(Department of Management,Qiannan Nationality Professional Technology College,Guizhou Duyun 558022,China;School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]黔南民族职业技术学院管理系,贵州都匀558022 [2]上海理工大学能源与动力工程学院,上海200093

出　　处：《船舶工程》2020年第10期120-125,共6页Ship Engineering

基　　金：国家自然科学基金(51976131;51676131);国际(地区)合作与交流项目(51811530315);上海“科技创新行动计划”地方院校能力建设项目(19060502200)。

摘　　要：基于流固耦合方法对分隔板圆柱绕流进行数值模拟研究,分析了雷诺数Re=200时,分隔板长度L(D≤L≤3D)对圆柱受力和周围流场的影响。结果表明:L≥2D时,考虑流固耦合后柔性分隔板圆柱的升力系数大于刚性分隔板圆柱,且随板长增加升力系数不断提升,阻力系数也相应增大;柔性分隔板尾缘流场受自由端上下摆动影响,未出现小尺度旋涡,同时分隔板上、下表面均出现旋涡。此外,流固耦合条件下尾缘旋涡结构模式将发生变化,刚性分隔板圆柱尾迹旋涡为2P型,柔性则为2S型;随分隔板长度增加,柔性分隔板自由端发生偏转,增加了对流场的额外扰动,分离流的旋转特性受到抑制,斯特努哈尔数(St)均小于刚性分隔板(L=2D除外),同时脱落涡的涡强及脱落频率均有所降低。The paper simulate the cylinder around splitter plate based on the fluid-structure interaction method, and analysis that the Reynolds number Re=200, which the length L(D≤L≤3D) of the splitter plate have influence on the force of the cylinder and the flow field around. The results show that when the length of the splitter plate is L≥2D, the lift coefficient of the flexible splitter plate circular cylinder is larger than that of the rigid splitter plate circular cylinder, and the lift coefficient increases with the plate length, and the drag coefficient increases accordingly. The flow field at the trailing edge of the flexible splitter plate is affected by the up and down swing of the free end. No small-scale vortices appear, and vortices appear on both the upper and lower surfaces. In addition, the pattern of the vortex structure at the trailing edge will change under the fluid-structure interaction. The rigid splitter plate circular cylinder wake vortex is 2P mode, and the flexible is 2S mode. As the length of the splitter plate increases, the free end of the flexible splitter plate deflects, which increases the additional disturbance to the flow field. The rotation characteristics of the separated flow are suppressed, and the Strouhal number(St) is smaller than the rigid splitter plate(except L=2D), while the vortex strength and the shedding frequency of the shedding vortex are reduced.

关 键 词：流固耦合 分隔板 圆柱绕流 旋涡结构 

分 类 号：TK72[动力工程及工程热物理—流体机械及工程]