大空间火灾接触式感烟探测仿真分析  

Simulation and Analyses of Contact Smoke Detection in Large Space Fire

作　　者：陈曦[1] 钱稼茹[1] 周怡斌[1] 张微敬[2] 

机构地区：[1]清华大学土木工程系结构工程与振动教育部重点实验室,北京100084 [2]北京工业大学建筑工程学院,北京100022

出　　处：《系统仿真学报》2009年第24期7758-7762,共5页Journal of System Simulation

基　　金：十一五国家科技支撑计划(2006BAJ13B03-02)

摘　　要：为研究接触式感烟探测器在大空间火灾场景中的工作性能,针对点型和空气采样2款探测器产品,分别采用数值风洞实验和ASPIRE2程序模型化环境烟雾到达其各自探测腔的过程;结合某体育馆FDS火灾分析结果,给出了该2款探测器基于遮光率响应阀值的工作性能评测。结果表明:点型探测器对小功率火探测失效;空气采样探测器探测效果受管网布置影响较大,水平管结合下垂管的组合采样方式能有效克服热分层环境影响,对各种火灾情况应对能力强,尤其对小功率火探测优势明显。To study the working performance of contact smoke detectors in large space fire,numerical wind tunnel experiments and ASPIRE2 program were adopted respectively to model the process of smoke entering the sensing chamber of two kinds of detector products：spot-type smoke detector and air sampling smoke detector.On the basis of FDS fire simulation of a certain gymnasium,the performance evaluation of the two detector products were proposed based on the alarm threshold of obscuration.The analysis results show that the spot-type smoke detectors fail to detect small fires;while the effect of air sampling detection is significantly influenced by the arrangement of pipe networks.The assembled sampling,which combines ceiling and vertical pipes,can overcome the adverse effect of thermally stratified environments,and have high coping ability in various fire situations,especially for small fires.

关 键 词：大空间火灾 感烟探测 点型探测器 空气采样探测器 热分层环境 仿真分析 

分 类 号：TU892[建筑科学]