摘要
对不同间距正品字形布置的三管钢烟囱的风荷载进行了数值模拟。烟囱间的中心距L与单烟囱的直径D之比L/D的变化范围为2.4~4.8。数值模拟结果显示:在较小间距时,上游烟囱的阻力系数均值明显小于单烟囱的阻力系数均值,下游并列双烟囱的阻力系数均值稍大于单烟囱的阻力系数均值;在较小间距时,下游并列双烟囱受到大小相等、方向相反的横风向升力作用。
The wind load of three steel chimneys in a regular triangle arrangement is numerically investigated. The spacing ratios are in the range of 2.4≤L/D≤4.8, where L is the distance between the centers of adjacent chimneys, D is the diameter of a single chimney. The numerical simulation results show that in small spacing ratio, the mean drag coefficient of an upstream chimney is smaller than that of a single chimney, and that the mean drag coefficients of two downstream chimneys are slightly bigger than that of a single chimney. When spacing ratio is small, there are lift forces acting on two downstream chimneys. The lift forces are equal to each other but act in an opposite direction.
出处
《工程力学》
EI
CSCD
北大核心
2017年第B06期154-158,共5页
Engineering Mechanics
基金
国家自然科学基金项目(51308359)
河北省高等学校科学技术研究基金项目(QN20131169
QN2015213)
关键词
三管钢烟囱
数值模拟
风荷载
阻力系数
升力系数
three steel chimneys
numerical simulation
wind load
drag coefficient
lift coefficient
