建筑物干扰条件下双烟囱的风洞试验研究

主要介绍某发电厂双烟囱在有建筑物干扰条件下的风洞试验研究,并主要测试了烟囱在各个风向角条件下基底的静态力和动态力。刚性模型的试验结果表明：当两烟囱处于串列状态时,上风侧烟囱存在显著的遮挡效应,使得下风侧烟囱的静态基底力显著降低。气动弹性模型试验得到的动态基底力结果表明：当两烟囱处于串列状态时,上风侧烟囱对下风侧烟囱的气动干扰较为显著,导致其动态力较大。当烟囱前方存在厂房干扰,且风向角为195°时,烟囱基底的合成弯矩有最大值。

The wind tunnel test investigation on wind loading of twin chimneys considering the interference of chimneys and surrounding buildings

The wind loading of twin cylinder chimneys was investigated by the wind tunnel testing.The static force and dynamic forces at basement of the chimneys under different yaw angles of wind were measured particularly considering the interference of chimneys and surrounding buildings.Results of stiff model testing show that the shelter effects of the front chimney can cause a remarkable reduction of the base static forces of the back chimney when they are in tandem arrangement.Results of aeroelastic model testing demonstrate that when the two chimneys are arranged in tandem,dynamic forces of the back one are significant due to aerodynamic interference of the front one.When the surrounding buildings are in front of the chimneys and the yaw angle of wind is 195°,the synthetic base moment at chimney takes the maximum quantity.