摘要
采用双层区域模拟思想,针对某单层地铁站台火灾建立了火灾烟气蔓延的数学模型。应用CFAST3.1.7软件求解了上层烟气温度、体积分数、厚度随时间的变化关系,分析得出火灾达到危险状态所需时间小于人员安全疏散时间的结论,为地铁防排烟系统的合理设计提供了依据。
Under the circumstance that a subway's platform is firing, this article establishs mathematical and physical model by using Two-layer zone simulation.On the basis of it, CFAST software is used to calculate the relationship about upper layer's temperature\density\thickness and time. Moreover, a consequence that times spended on fire's arriving at danger are smaller than times spended on people's evacuating is obtained. Thus, a mode of ejecting smoke must be established. It provides a good foundation for designing the system of preventing and ejecting smoke in subway.
出处
《消防科学与技术》
CAS
2005年第4期437-439,共3页
Fire Science and Technology
基金
江苏省社会发展计划项目"城市地铁站火灾烟气控制研究"(BS2003031)
关键词
区域模拟
CFAST
危险临界务件
安全疏散
消防
<Keyword>zone model
CFAST
critical condition in danger
evacuate safely
fire
