摘要
基于美国国家标准与技术研究院(NIST)开发的火灾动态模拟软件FDS,以位于西北地区某地的综合楼为研究对象,经过综合分析,选取本综合楼地下二层车库和地上一层商铺餐馆作为火源点,分别对其进行数值模拟分析。对火灾发生后各个主要时间节点的烟气蔓延情况、人员高度处烟气能见度分布情况、火灾烟气温度分布情况分别进行了数值模拟。通过监测人员高度处(2m)的烟气能见度和烟气温度,然后与该种参数对应的危险临界值分别进行比较。模拟分析得出,烟气能见度最先对人员安全疏散产生重大影响;并且在1200s的模拟时间内,火灾烟气温度没有达到危险临界值。该火灾发展和烟气流动情况的模拟结果可作为定量消防论证的一部分,为消防设计和消防验收提供参考。
Taking the comprehensive building in a certain place of the northwestern area as an example,the FDS(Fire Dynamics Simulator)was selected as the simulation tool.After comprehensive evaluation and actual analysis,the underground two–story garage and the restaurant on the ground of the comprehensive building were chosen as the fire site to carry on the numerical simulation respectively.Smoke spreading,smoke visibility at people level and smoke temperature field were numerically simulated respectively at each major time node.By monitoring the smoke characteristic parameters at the people level(2m)on staff– intensive floor,including smoke visibility and smoke temperature affecting people safety,and then compared with the dangerous levels of the certain parameter respectively.The simulation analysis shows that the dangerous time of smoke visibility is the earliest factor to affect the personnel evacuation.Within 1200s simulation time,the smoke temperature does not reach the critical value,and has little effect on personnel evacuation.The simulation results of the fire development and smoke movement can be used as a part of quantitative fire demonstration and to provide reference for fire control design and fire acceptance so as to formulate a comprehensive fire strategy plan.
作者
赵寿
张云霞
ZHAO Shou;ZHANG Yun-xia
出处
《节能》
2018年第3期87-91,共5页
Energy Conservation
关键词
烟气特性
火灾
FDS
综合楼
smoke characteristics
fire
FDS
comprehensive building
