摘要
对丙烷－空气预混气的爆燃火焰在平行板狭缝中传播时的淬熄现象进行了实验和理论研究，给出了火焰传播速度与淬熄直径、淬熄长度的关系，对爆燃火焰在狭缝中淬熄机理作了探讨，并得到了有实用价值的结论。
An experimental study on the quenching of explosion for propane-air mixtures when the flame passes narrow parallel channels is described. Some photos and curves about the relation of the explosive flame velocity, quenching diameter and quenching length are obtained. The device of the experiment is a rectangular section shock tube. When the explosion flame passes through the tube which is set up a series of narrow parallel channels, the photographs of the flame quenching in different width channels can be obtained through the window on the tube by the camera. In this paper a theoretical model of flame quenching has been presented which is based on heat conduction of cold boundary. The relation of flame velocity v, quenching diameter D and quenching length ito has been given. The results of comparison of calculated values and measured values prove that the cold wall effect is the most primary factor of the quenching of deflagration flame. But when the flame velocity reaches supersonics, the deviation between the calculated and the measured values is increased. It shows that the cold wall effect is the only one factor for the quenching of detonation flame. The equation (8) obtained in this paper which gives the relation of Lq, v and D, when D≤1 mm, can provide some useful reference data for design of industrial crimped--ribbon flame arresters.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1997年第2期111-118,共8页
Explosion and Shock Waves
基金
国家自然科学基金
关键词
丙烷
爆燃火焰
平行狭缝
淬熄
气相
爆震
propane, deflagration flame, narrow parallel channel, quenching
