摘要
采用高速摄影法及通过对爆炸反应区内不同部位温度的测量 ,对瓦斯爆炸传播火焰的特性进行了试验研究 .研究发现 ,瓦斯爆炸产生的向前传播的火焰沿管道横断面分布不均匀 ,反应区内主要发光体沿管道底部向前传播 .该发光体在低温下具有较高的内聚力 ,高温时容易瓦解 .在瓦斯爆炸反应区内 ,中间产物的成分沿管道横断面分布也不均匀——管道中、上部是发光较弱的气体产物 ,放热量较大 ;而下部是亮度较高的等离子体 ,放热量较小 .当瓦斯爆炸温度达到最大值以后 ,等离子体的内聚力急剧下降 ,等离子体爆发 。
By measuring the temperature at different positions in the reaction zone and using high-speed photography, the property of propagating flames in gas explosion was investigated. The results show that the distribution of propagating flames generated by gas explosion was non-uniform in the cross section of the experimental pipe and the main luminosity in the reaction zone propagates along the bottom of the pipe. This luminosity has great cohesive force at low temperature and is easy to break up at high temperature. The distribution of intermediate products in the explosion reaction zone is also non-uniform. The intermediate product in the middle and upper part of the pipe is gas with less luminance, which gives off more heat. And at the bottom of the pipe is plasma with high luminance, which gives off comparatively low heat. When explosion temperature reaches the maximum, the cohesive force of the plasma drops sharply, so that breaks up and the distribution of the explosion product becomes uniform in the pipe cross section.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2001年第3期217-220,共4页
Journal of China University of Mining & Technology
关键词
瓦斯爆炸
火焰结构
爆炸温度
内聚力
等离子体
高速摄影法
形成机理
Chemical reactions
Explosions
High speed photography
Luminescence
Plasmas
Temperature measurement
Wave propagation
