乙醚-铝粉-空气混合物燃烧转爆轰的实验研究

Experimental Study of Deflagration to Detonation Transition of Ethyl Ether-Aluminum-Air Mixtures

在长为32.4m、内径为0.199m的大型长直水平管道中对乙醚-空气混合物、乙醚-铝粉-空气混合物的燃烧转爆轰(DDT)过程进行了实验研究.对多相混合物弱点火条件下的DDT过程不同阶段的特征进行了分析,并对不同浓度时混合物的燃爆情况进行了比较.结果表明,质量浓度为295g/m3的乙醚-空气混合物与质量浓度分别为314,230g/m3的乙醚-铝粉-空气混合物在管道末端测点范围内均能够形成自持爆轰.

Motivated by the current interest in the mechanism of the deflagration to detonation transition（DDT）, research on DDT of ethyl ether-air mixture and ethyl ether-aluminum-air was implemented by the experimental system with a large-scale tube of 32.4 m in length and 0. 199 m of inner diameter. The processes of DDT in the clouds of the mixtures were analyzed and the mixtures with different concentrations were compared. The results indicate that a self-sustained detonation could be formed in the ethyl ether air mixture with the ethyl ether concentration of 295 g/ma, while in the ethyl ether-aluminum-air mixture, the ethyl ether and aluminum concentrations would be 314 g/ma and 230 g/ma , respectively.