海洋科学2017，Vol.41Issue(7)：137-142,6.DOI:10.11759/hykx20161120001
不同倒角半径下方柱绕流的数值模拟及水动力特性研究
Hydrodynamic characteristics and numerical simulation of flow around square cylinders at different filleting radii
摘要
Abstract
To study the effect of different filleting radii on the flow characteristics around a square cylinder, in this study, we used Fluent software and the finite volume method to simulated a Reynolds number of 22 500, and ap-plied filleting radii of 0.1 D, 0.2 D, and 0.3 D in a square cylinder flow process. We used an enhanced wall function for the wall near the square cylinder and the SST k–? in our turbulence model. Based on the simulation results, we obtained the flow-field vorticity map, drag coefficient, and lift coefficient of a square cylinder with different fillet-ing radii. We obtained the vortex shedding frequency by the fast Fourier transform method. The results show that the chamfer radius changed with an increasing separation column, with the wake length increasing and the vortex scale decreasing. We found the drag coefficient and lift coefficient amplitude to first decrease and then increase, with a square column stress radius for 0.1 D and smaller 0.2 D, and a unilateral column with a larger chamfer radius of 0.3 D. With an increase in the fillet radius, the column section is connected with a circular form, the Strouhal number increases, and the vortex shedding frequency is faster.关键词
方柱绕流/倒角半径/升力、阻力系数/漩涡脱落形态/斯托罗哈数Key words
flow around square cylinder/filleting radius/lift and drag coefficient/vortex shedding pattern/Strouhal分类
建筑与水利引用本文复制引用
杜明倩,毛海英,李宇佳..不同倒角半径下方柱绕流的数值模拟及水动力特性研究[J].海洋科学,2017,41(7):137-142,6.基金项目
山东省自然科学基金(ZR2017BEE047) （ZR2017BEE047）
鲁东大学科研基金(LB2016010) Natural Science Foundation of Shandong Province, No. ZR2017BEE047 （LB2016010）
Foundation Scientific Research Funds of Ludong Uni-versity, No. LB2016010 （）
