摘要
通过不同高度小功率火源的6组试验,结合同工况的FDS模拟,将试验、数值模拟和Heskestad理论模型计算结果对比发现:理论模型的轴线温度计算结果远高于实际值,但在顶棚发生射流处,能够准确预测温度;FDS得到的火焰高度有一定误差,且受辐射影响较大;顶棚射流烟气可以根据温度的衰减梯度划分为3个区域:稳定区、骤变区和渐变区。
Through six groups of compartment experiment under different height of small fire power and FDS simulation, the re sults of experiments, simulation and Heskestad empirical formula were compared. Results showed that, the axis temperature calcula tion results of empirical formula is much higher than the actual value, while at the jet on the ceiling, the temperature can be accurate predicted; flame height from FDS has some error, and the influence of radiation is big; ceiling jet of flue gas can be divided into three regions： stable region, mutation region and transition region.
出处
《消防科学与技术》
CAS
北大核心
2017年第7期920-922,共3页
Fire Science and Technology
基金
江苏省自然科学基金青年基金项目(BK20160270)
关键词
火源位置
小室火灾
温度场
烟气
fire location
small compartment fire
temperature field
flue gas
