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本文阐述了地下通道火灾排烟的通风系统模拟分析,烟气流过着屏蔽门时的局部阻力系数,再利用网络模型模拟地下隧道、各通风井的通风排烟量,以确定其能否满足通风排烟要求,对地下事故工况风机的设置、地下事故工况的处理预案,不同形式区间隧道通风系统对隧道内通风速度场、温度场及新风量的影响规律。研究同时对通风系统方案进行了初步的技术经济比较。本研究为分析地下通风系统的空气流动与传热提供了参考,为通风系统方案的选择。
In this paper, the simulation analysis of the ventilation system of underground passageway fire exhaust smoke is introduced. The local resistance coefficient of smoke flowing through the screen door is expatiated, and then the network model is used to simulate the ventilation and exhaust of underground tunnels and ventilation shafts to determine whether it satisfies Ventilation and smoke emission requirements, the setting of underground accident fan, the handling of underground accident conditions, the influence of different types of tunnel ventilation system on ventilation velocity field, temperature field and fresh air volume in the tunnel. At the same time, a preliminary technical and economical comparison of ventilation system solutions was carried out. This study provides a reference for the analysis of air flow and heat transfer in underground ventilation systems, which is the choice of ventilation system.