高层旅馆建筑火灾烟气扩散规律探讨

分析得出火灾产生烟气的速率较关闭门窗的渗漏空气量大得多 ;分析了影响火灾烟气扩散的各种压力作用机理 ,特别提出了燃烧过程好象一台不断运转的小型“风机” ,燃烧过程产生的浮力和膨胀力为高温烟气沿顶棚扩散、沿外窗外逸提供动力 ,并指出火风压不能简单的用空气柱重量差计算 ;利用流体力学能量方程理论 ,分析了 5种情况火灾房间的压力变化和火灾烟气泄出的情形 ;得出了火灾烟气可能出现的扩散形式 .图 4,表 3,参 8

The law of smoke diffusion in fires of high hotel building

A conclusion is drawn that the rate of smoking in fires is much faster than that of the permeated air through the fissures of the closed doors and windows.The function principle of different pressures which affects the smoke diffusion is analysisde in this paper.Particularly, it puts forward that the combustion process is just like a small continuously running fan, during which the buoyancy and inflation are produced and they provide the diffusion of the high temperature smoke along the floor slab and that along the outer window with motive force. Meanwhile, it advances that the fire and wind pressure should not simply be calculated with the weight difference of the air column, and it also analyses the pressure variation and the state of smoke release in the fire room in five different conditions with the theory of energy equation of hydro-mechnics and comes out the possible forms of smoke diffusion.4figs.,3tabs.,8refs.