摘要
通过FDS模拟研究在"聚能罩"作用下燃烧过程的"聚能效应",并与无聚能罩的燃烧情况进行对比,对聚能现象的机理进行分析。模型建立主要通过Pyrosim实现,模拟燃烧物选取黄杉木。研究结果表明:在有聚能罩的情况下,燃烧热释放速率降低,燃烧时间延长,热通量和温度波动较大。聚能效应主要是由于燃烧产生的高温烟气到达聚能罩后会向中心产生反射,反射后沿中心向下产生聚合。
＂shaped-charge effect＂ of combustion process under the ＂hood shaped＂ was researched by FDS simulation. The combustion situations with and without shaped cover were compared to analyze the mechanism of the phenomenon. The modem was built mainly by Pyrosim and the comburent was yellow cedar. The results show that in the case of shaped cover, the heat release rate was lower, the burning time was extended and the undulation of heat flux and temperature was big. Shaped effect is mainly because of the high temperature smoke will reflect to the center then converge downwards after reaching shaped cover.
出处
《消防科学与技术》
CAS
北大核心
2011年第2期91-94,共4页
Fire Science and Technology
基金
江苏省科技支撑项目(BE2009624)
江苏省城市与工业安全重点实验室开放课题资助(2008UIS004)
