大型水平管道中环氧丙烷-铝粉-空气混和物爆燃转爆轰的实验研究  

Experimental Research of Deflagration to Detonation Transition of Epoxypropane-Aluminum-Air Mixtures in Large-Scale Tube

作　　者：陈默[1] 白春华[1] 刘庆明[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《高压物理学报》2011年第4期359-364,共6页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(10772032);爆炸科学与技术国家重点实验室基金(ZDKT08-2-6;YBKT09-1)

摘　　要：在长为32.4 m、内径为0.199 m的大型长直水平管道中,对环氧丙烷-空气两相流云雾及环氧丙烷-铝粉-空气三相流云雾的爆燃转爆轰(DDT)过程进行了实验研究。对弱点火条件下多相混和物DDT过程的不同阶段特征进行了分析,对比研究了不同浓度时混和物的燃爆情况。结果表明:浓度为513 g/m3的环氧丙烷-空气混和物及浓度为237和643 g/m3的环氧丙烷-铝粉-空气混和物均能在管道中完成爆燃向爆轰的转变,进入自持爆轰阶段,其胞格尺寸分别为0.28和0.50 m。Motivated by the current interest in the mechanism of the deflagration to detonation transition （DDT）,the DDT experiments of epoxypropane-air mixture and epoxypropane-aluminum-air mixture are carried out by a large-scale tube （32.4 m long and 0. 199 inner diameter）. The processes of DDT in multi-phase clouds are analyzed,and the mixtures with different concentrations are compared. The self-sustained detonation waves are formed in the epoxypropane-air mixture with epoxypropane concentration of 513 g/m3 and epoxypropane-aluminum-air mixture with epoxypropane and aluminum concentrations of 237 and 643 g/m3 ,and moreover the cell size of the detonation are 0.28 and 0.5 m, respectively.

关 键 词：爆燃转爆轰 弱点火 环氧丙烷 铝 自持 

分 类 号：O382.1[理学—流体力学]