摘要
为研究射流对爆轰传播过程的影响,对爆轰管内安装物理障碍物和采用射流喷射方式2种情况下的燃烧转爆轰过程进行了数值模拟。计算结果发现,这2种方式都能有效促进燃烧转爆轰过程。射流通过与爆轰管内火焰相互作用能提高火焰传播速度,有效促进燃烧转爆轰过程;与安装物理障碍物相比,采用射流方式能缩短燃烧转爆轰距离约15.4%。计算结果可为脉冲爆轰发动机实验提供理论指导。
To study the influence of jet flow on the propagation of detonation wave, the deflagration-to-detonation transition （DDT）process were numerically simulated aiming at two cases：physical obstacle and jet flow in detonation tube. The results show that detonation was achieved under the two conditions. Jet flow undergoing a complex process with the flame in the detonation tube can accelerate the flame velocity in the pre-mixed combustible mixture; thus the DDT process can be strengthened. Compared with the case of utilizing physical obstacle, the case of adopting jet flow in the detonation tube can shorten the DDT run-up distance by 15.4%. The results provide theoretic guidance for experiment of pulse detonation engine.
出处
《弹道学报》
CSCD
北大核心
2013年第3期83-87,共5页
Journal of Ballistics
基金
国防预研基金项目
关键词
射流
爆轰波
燃烧转爆轰
数值模拟
jet flow
detonation wave
deflagration-to-detonation transition
numerical simulation
