中文摘要：

在常规风速下，许多圆截面工程结构的雷诺数一般达到10^7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5m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。

英文摘要：

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.