外界风影响下高层建筑竖井自然排烟可行性

Feasibility study of natural ventilation under outdoor wind using smoking shaft in high-rise buildings

以高层建筑竖井自然排烟为研究对象,利用FDS软件对竖井自然排烟进行模拟,研究外界风对自然排烟的影响。模拟结果表明:当排烟口处于迎风面时,竖井自然排烟受到的影响最大;当竖井顶部四面开启排烟口时,自然排烟受室外风的影响最小。由模拟可见,通过合理设计竖井结构,高层建筑竖井自然排烟是可行的。

The natural ventilation using smoking shaft in high-rise buildings was studied.FDS was used to study the wind effect on the natural venting.The results show that,natural smoke extraction was affected mostly when the exhaust port is on the windward side,and was affected lightest when all the exhaust port at the top of the shaft is open,by the outdoor wind.The natural ventilation using smoking shaft in high-rise buildings is feasible through rational design of the shaft structure.