火区巷道充注惰气过程的模拟研究

Simulation Study on the Process of Pumping Inert Gas into Fire Area Roadway

文章从化学流体力学基本定律出发 ,建立了火区巷道充注惰气流动数学模型 ,给出了数值模拟计算方法 ,并在火灾试验巷道内进行了充注惰气灭火模拟试验。试验结果表明 ,充注惰气使火区气体呈非稳定的紊流扩散流动 ,使火区快速进入熄灭、惰化状态。

By taking the fire area gas unsteady flow and the turbulent diffusive heat-transfer mass transfer as the physical model and proceeding from the basic law of chemical fluid mechanics, the fire area inerts-pumping flowing field mathematical model has been established with the rated solving condition and the resolving procedures given. In order to study the flowing law of inert gas in the roadway, a description of inerts-pumping simulation tests is provided in the paper, and the result shows that inert gas presents an unsteady turbulent diffusive flowing process and the role played by inert gas in causing the fire area to be inertia and in temperature-lowering and methane-migrating is mainly dependent upon the inerts-pumping intensity.