火灾规模及通风速度对温度分布及温度扩散范围具有明显的影响。
Furthermore, the temperature distribution and influential length of hot smoke in the tunnel vary significantly with air velocity and fire load.
在分析了地铁站台火灾时烟气流场变化规律的基础上，提出了临界通风速度的概念。
Based on the analysis of the variation law of smoke flow in subway platform fire, a concept about critical ventilation speed from platform to concourse was presented.
研究表明火源条件设定对于数值模拟结果有显著影响，对于热释放率较小的火灾，采用单纯热源模型预测临界通风速度较安全。
The simulation results were compared with the previous study and the small-scale experiments. It shows that the choice of the fire source model has significant influence on simulation results.
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