单室火灾烟气流动规律的数值模拟

Numerical Simulation of the Fire Smoke Movements in a Separate Room

本文利用商业计算流体软件PHOENICS,分别对自然通风、空调送风、自然排烟、机械排烟等四种常见的建筑通风状态下的客房进行烟气流动规律的模拟研究,得出:火灾后,自然排烟和机械排烟在一定程度上都能将着火房间的烟气、热量排出室外,降低着火房间的烟气浓度和温度,但机械排烟的效果较自然排烟稳定。本文计算机场模拟的结果证明了使用CFD技术对火灾现象进行数值模拟是可行的,可用于指导室内火灾的扑救和火场人员的安全疏散。

Used the commercial computational fluid mechanics software PHOENICS, numerical simulations of the smoke movements in four different ventilation working conditions were achieved, which include natural ventilation, air-conditioning supply, natural smoke extraction and mechanical smoke extraction. The smoke and the heat are expelled from the fire room through natural smoke extraction system or mechanical smoke extraction system during a fire, which reduces the concentration of the smoke and the temperature. The smoke extraction effect of the former is worse than the latter. The results of the study, which approves the feasibility of field simulation based on the CFD technology, can be used as reference in fire control and evacuation during a fire.