摘要
为了得到室内火灾温度,采用理论推导和数值模拟相结合的方法对其进行研究。首先建立了室内火灾温度场的数值模拟方法,以Steckler开口流动试验数据作为参考,对比软件FDS模拟室内火灾开口流动的准确性及适用性;其次通过火灾室内热烟气层的热平衡得到了室内火灾温度的基本公式,公式体现了影响室内温度的相关因素;最后采用火灾场分析软件FDS建立多种火灾情况模型,从而得到火灾室内热烟气层温度,进而得到基本公式中相关参数的取值。分析表明:室内火灾温度随着火源热释放速率的增加而增大,随着围护结构的有效热传递系数和通风口尺寸的增加而减小。
Theoretical derivation and numerical simulation method were combined to study the temperature of indoor fire.Firstly,taking steckler open flow test data as a reference,numerical simulation method of temperature field of indoor fire was established to compare with the accuracy and applicability of FDS simulation of indoor fire opening flow; secondly the basic formula of indoor fire temperature was obtained by heat balance of hot smoke layer in indoor fire,and the formula reflected the related factors affecting the indoor temperature; finally,fire field analysis software FDS was used to establish a variety of fire models to get hot smoke layer temperature in indoor fire,and then the values of the relevant parameters in the basic formula were determined.The results show that the indoor fire temperature increases with the increase of the heat release rate of the fire source,and decreases with the increase of the effective heat transfer coefficient of the envelope and the size of the vent.
出处
《建筑结构》
CSCD
北大核心
2017年第23期46-49,共4页
Building Structure
基金
深圳市原创项目研发资助(YC2015020)
关键词
室内火灾
火灾温度
热平衡
FDS
预测分析
indoor fire
fire temperature
heat balance
FDS
prediction analysis
