摘要
对高速爆燃火焰在He与N2作用下在圆管内的淬熄进行了数值模拟,分析了当可燃气体活性与圆管直径不同时惰性气体对淬熄的影响.结果表明,He的淬熄性能大大优于N2,火焰在圆管内的淬熄长度随着可燃气体活性的增强而增大,活性较高的可燃气体火焰在N2中不容易被淬熄.对肯尼斯层流扩散火焰的淬熄模型方程进行了修正,得出了在爆燃条件下圆管的临界淬熄直径正比于惰性气体热扩散率的1/3次方的结果.
The quenching of high-speed deflagration flame in tube under the effects of inert gases is studied by the method of numerical simulation. The inert gases are helium and nitrogen. The influences of inert gases on the quenching under different combustible gas activity and tube diameter are researched. The result reveals that helium is far better than nitrogen in quenching flame. The quenching length will increase with the boost of combustible gas activity. The flame of combustible gas with higher activity is hard to quench in nitrogen. A modification is made for the Kenneth＇ s quenching model of laminar flame, and it is concluded that the critical quenching diameter of the tube is proportional to the one-third exponent of inert gas thermal diffusivity.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2008年第3期193-198,共6页
Journal of Combustion Science and Technology
关键词
火焰
惰性气体
淬熄
flame
inert gas
quenching
