水喷淋下大空间建筑烟气输运的数值模拟研究  

The numerical simulation of gas transport in large-space buildings under the action of water spray

作　　者：杨天佑[1] 朱杰[1] 

机构地区：[1]西南交通大学环境科学与工程学院消防工程系,成都610031

出　　处：《中国安全生产科学技术》2009年第6期81-85,共5页Journal of Safety Science and Technology

摘　　要：大空间建筑由于其功能、结构上的特殊性,使得现有的消防规范不能满足其防火要求,特别是针对大空间建筑的防排烟设计就更为不适用。性能化设计方法是目前防火领域最先进的技术,水喷淋系统作为大空间建筑原有的消防设施其对火灾烟气输运的影响,已作为一项重要的性能参考指标。笔者从数值模拟的角度出发,利用流体动力学软件FDS,研究有无喷淋情况下火源功率能量传递及羽流烟气的输运过程。通过对两种火灾场景下火羽流温度、地面传导热通量及辐射热通量的对比分析,探讨了火羽流流场分布形式,为大空间建筑的防排烟设计提供有力参考。The current Fire Code can＇t meet the fire safety requirements for large space building, because of its function and structural peculiarities, especially not apply for anti-smoke design of large space building. The performance-based fire safety design method is the most advanced technology in the field of the current fire prevention, Water spray system as the original large space building fire safety facilities has impact on the transport of fire smoke, which has served as a key performance indicator for reference. The author from the perspective of numericalsimulation, using fluid dynamics software FDS, study energy transfer of fire-power and fire plume transport process in the case of whether there is or not water spray. By comparative analysis of fire plume temperature, surface conduction heat flux, and radiation heat flux in two fire scenarios, we discuss of fire plume flow field distribution form so as to provide a strong reference in smoke control design of large-space building.

关 键 词：释热速率 数值模拟 火灾场景 火羽流 场模型 轰燃 

分 类 号：X932[环境科学与工程—安全科学]