水平巷道火灾浮羽流及顶板射流积分模型

Integral models for fire buoyant plume and ceiling jets in horizontal roadway

为研究矿井火灾火源区域烟流流动规律,以便对矿井火灾灾变风流的流动状态进行更详细地描述和计算机动态模拟,分析了矿井水平巷道火灾浮羽流的特性和顶板射流的形成原因,从基本物理定律和守恒方程出发,采用二维平面射流和动量积分分析方法,建立了水平巷道火灾浮羽流和顶板射流的数学模型。此模型经实验和计算检验修正后将作为矿井火灾区域模拟的理论基础。

In mine fires, smoke and other combustion products may form a layer near the ceiling and flow in the direction opposite to the ventilation flow and this will bring bad effects on mine ventilation system. In order to study the flowing law of the fire smoke near the area of mine fire source, and to depict and predict in detail the state of mine flow and smoke in a mine fire through computer simulation, the characteristics of the fire buoyant plume and the reason of the ceiling jets formed in horizontal roadway are analyzed in this paper. Based on the above analyses, a two-dimensional mathematical integral model for the fire buoyant plume and ceiling jets in horizontal roadway is developed according to the basic physical principles and conservation laws of fluid mechanics, combustion and heat transfer. After being tested and corrected these models will be used as the foundation of the zone modeling for mine fires.