超长汽车坡道防排烟设计

摘要

以某长度为228．4 m 的汽车坡道为例，分析了超长汽车坡道排烟设计的难点。采用 FDS 软件进行了 CFD 模拟，验算了具体的排烟效果，分析比较了横向排烟与纵向排烟各工况烟气蔓延与能见度分布，找出了一个高效、安全、可靠的防排烟解决措施。%Taking a length of 228.4 meter car ramp as an example,analyses the difficulties of the smoke control and extraction design for the overlength car ramp.Carries out the CFD simulation by using FDS software,and checks the concrete smoke extraction effect.Compares and analyses the smoke spread and visibility distribution under different conditions of vertical and horizontal smoke extraction,and finds out an efficient,safe and reliable smoke control and extraction solution.