脊状结构表面圆柱绕流的流体特性研究  

Study on hydrodynamic characteristics of flow around a cylinder with ridged surface structure

作　　者：王伟[1,2] 宋保维[1,2] 毛昭勇[1,2] 张婷颖[1] Wang Wei;Song Baowei;Mao Zhaoyong;Zhang Tingying(School of Marine Science and Technology;Key Laboratory of Unmanned Underwater Vehicle Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi＇an 710072,China)

机构地区：[1]西北工业大学航海学院,陕西西安710072 [2]西北工业大学无人水下运载技术工业和信息化部重点实验室,陕西西安710072

出　　处：《华中科技大学学报（自然科学版）》2018年第9期107-111,132,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51179159,61572404)

摘　　要：通过构造脊状结构表面,采用非定常数值计算方法,对圆柱表面的绕流场及其水动力特性进行数值计算和研究.结果表明：不同结构参数h和θ的脊状结构对圆柱绕流的控制作用均不同,最佳的结构参数分别是h=2 mm和θ=10°;在一定雷诺数条件下,脊状结构表面既可以减小圆柱表面阻力,又可以有效控制圆柱的脉动升力并延缓边界层的分离;随着雷诺数的增大,脊状结构对圆柱绕流的控制效果会减弱.计算条件下的最优控制效果为：阻力系数最大减少32.56%,升力系数最大减少65.41%,因此提出的脊状结构表面的方案对于控制圆柱表面绕流造成的疲劳损伤或破坏具有一定的参考价值.A transient computational fluid dynamics method was used for the study on the hydrodynamic characteristics of flow around a cylinder with ridged surface structure.The results show that the ridged structures with different parameters h and different parameters θ have different effects on the flow around a cylinder,and the best parameters are h=2 mm and θ=10°.The ridged structure surface can reduce resistance of the cylinder,effectively control the periodic lift and delay the separation of boundary layer.With the increase of Reynolds number,the ridged structure surface is weakened in controlling the flowing.The best result is that the drag coefficient is reduced by 32.56% and the lift coefficient is reduced by 65.41%.Therefore,the rigid structure surface proposed in the paper has a certain reference value for controlling the damage or fatigue damage of the cylinder.

关 键 词：圆柱绕流 数值研究 脊状结构 流动控制 涡 流体特性 

分 类 号：O351[理学—流体力学]