机构地区: 广州大学信息与机电工程学院
出 处: 《城市轨道交通研究》 2007年第10期29-33,共5页
摘 要: 发生火灾时为乘客营造安全的撤离路径是地铁车站环控系统的重要任务。针对地铁车站环境控制系统设计中常用的两种紧急通风模式,使用计算流体力学(CFD)的方法,采用重正化群(RNG)k-ε双方程紊流模型,对待建地铁车站内列车中部火灾进行了三维数值模拟,得到了站台上的温度场、气流速度场和烟气浓度的分布。通过分析和比较,认为在列车中部发生火灾时,仅依靠事故风机难以营造安全的疏散路径,提出了相应的改进措施。并对数值模拟方法在地铁车站环控系统设计中的应用进行了探讨,为地铁车站环控设计中紧急通风模式的选型提供了参考。 Safety in fire is an important task for the overall safety system of subway station. Two typical ventilation strategies designed for emergency are simulated in three dimensions by using numerical method of computational fluid dynamic, together with Renormalization Group k - ε turbulence model. In the simulation, the temperature field, air velocity and smoke distribution in platform of each strategy have been achieved. It is shown that the emergency fan alone is not sufficient to ersure the safe route for passengers to evacuate, without UPE and OTE system when a fire occurs at the head of subway train. The necessity of UPE and OTE system is discussed and the application of numerical simulation method in the design of environment oontrol system of metro station is evaluated.
领 域: [交通运输工程]