摘要
以北京地铁某典型岛式车站为研究对象,建立火灾烟气运动的物理和数学模型,采用计算流体力学方法,模拟站台火灾工况下烟气发展和蔓延过程,分析反映流动与发展特性的温度场、速度场、能见度等的分布规律;同时运用人员疏散动力学方法,模拟火灾工况下人员安全疏散所需的时间。以必需安全疏散时间小于可用安全疏散时间作为性能化防火目标的判据,论证火灾烟控系统的有效性和通道设计的合理性,从而为地铁火灾排烟通风系统的合理设计和人员疏散方案制定提供合理、科学的参考依据。
By establishing a physical and mathematical model for the developing process of fire smoke on a typical island-platform of Beijing subway and adopting computational fluid dynamics method, simulation was carried out for the development and spread process of smoke when fire took place on the subway platform. The distribution regularities of the temperature field, velocity field and visibility obtained by analysis are presented in this paper. Meanwhile, evacuation dynamics was applied to simulate the required safety evacuation time for people in case of a fire. The criterion of the performance-based fire protection objective which stipulates the required safety evacuation time less than available safety evacuation time proves that the design for the fire smoke controlling systems and passages is valid and reasonable. This provides a reasonable and scientific basis for smoke-suppression ventilation design and the establishment of people evacuation scheme during a fire.
出处
《都市快轨交通》
2009年第1期91-95,共5页
Urban Rapid Rail Transit
基金
北京市科委重点项目(Y060506000007022)
关键词
地铁
岛式站台
烟气
数值模拟
安全疏散
subway
island-platform
smoke
numerical simulation
safety evacuation
