摘要
在常规风速下,许多圆截面工程结构的雷诺数一般达到107或以上,处于高超临界雷诺数区域。目前高超临界雷诺数下圆柱绕流的研究很少。鉴于此,针对直径为5 m的单圆柱,尝试进行了高超临界雷诺数下的风荷载数值计算,分别开展了计算域、周向网格数、法向首层网格的高度及计算时间步长等参数的无关性检查,得到了圆柱的阻力系数及圆柱周围的流场分布。
There are many engineering structures with circular sections. At regular wind speed, the Reynolds number of these structures can reach 107 or more which falls into high supercritical Reynolds number region. However, researches on circular cylinder in this region are few. Based on this situation, the wind load of a single circular cylinder of 5 meters in diameter is studied by numerical calculation. The computational domain, number of circumjacent grid, height of the first normal layer grid and computational time step are examined. The drag coefficient and the flow field distribution around the circular cylinder are obtained.
出处
《工程力学》
EI
CSCD
北大核心
2016年第B06期18-22,28,共6页
Engineering Mechanics
基金
国家自然科学基金项目(51378323
51108280
51308359)
河北省杰出青年科学基金项目(E2014210138)
土木工程防灾国家重点实验室开放基金项目(SLDRCE12-MB-05)
关键词
数值计算
高超临界
圆柱
阻力系数
雷诺数
numerical calculation
high supercritical
circular cylinder
drag coefficient
Reynolds number
