建筑网络火灾烟气流动稳定性及其控制分析

将建筑作为一个网络整体考虑,研究分析了火灾烟气流动机理,讨论了火灾烟气的热膨胀效应、烟囱效应及室外风力对建筑网络空气和烟气流动的影响.从质量守恒定律讨论了多层建筑中和面的位置及其影响因素,指出控制多层建筑中和面的方法和途径.通过建筑网络回路能量守恒方程,讨论了烟囱效应对建筑网络风流的影响,建筑网络火灾烟气流动的稳定性及合理的烟气控制措施.

Contrast study on smoke flow in case of fire with building network and corresponding stability analysis

This paper aims to introduce the author's analysis of the smoke flow mechanism in case of a fire by taking the building as a network. As is known, air and smoke flow is the result of gas expansion with the help of the chimney and the outdoor wind power in case a fire takes place in a building. Needless to say, the burning material produces a large quantity of smoke in a building fire. The poison smoke is also likely to diffuse quickly along with the air flow, which makes it hard for people to get out of it for the lack of light and poison and overheat caused by the fire and smoke. Studying the fire smoke flow mechanism in case of a building fire, the author has given an analysis of the effect of air and smoke flow as a result of the gas expansion, the chimney effect and the outside wind power when the fire occurs. The author has also studied the position of neutral plane and its influencing factors in a multi-storied building in accordance with the law of mass conservation and the ways on how to control the neutral plane. And finally the paper has also made a discussion of the effect of thermal air pressure and chimney effect as well as the reasonable smoke control measures by following the law of energy conservation in a building network.