高密实含能颗粒床燃烧转爆轰的实验与理论研究

EXPERIMENTAL AND THEORETICAL STUDIES FOR THE TRANSITION FROM DEFLAGRATION TO DETONATION IN HIGH PACKED ENERGETIC GRANULAR BEDS

给出了高密实含能颗粒床燃烧转爆轰现象的实验研究结果。根据实验观察到的现象，建立了描述燃烧转爆轰的两相流数学物理模型，并对模型中的某些本构关系作了改进。用MacCormack差分格式和自适应网格技术，对伴有强冲击波形成的物理过程进行了数值求解。数值预测的火焰传播、诱导爆轰长度和稳态爆轰速度与实验结果基本吻合，其结果与作者已发表的燃烧转爆轰的机理分析相一致[1]。

Experimental results of Deflagration to Detonation transition (DDT)in high packed energetic granular bed are presented in this paper. According to the observed phenomena, a mathematical model describing DDT is established based on the two-phase flow theory, and some constitutional relations in the model are improved. The physical process accompanied with strong shock wave are numerically solved by using MacCormack scheme and self-adaptive grid technique.The predicted convective flame front, predetonation length, and detonation velocity coincide basically with our experimental data, and its results are in agreement with our mechanism analysis of DDT published in reference 1.