摘要
为了实现预爆管出口爆震波向主爆管的成功传播,针对预爆管出口不同几何形状,开展了数值模拟研究,获得了爆震波从预爆管向主爆管传播的衍射特性.研究表明:当预爆管出口为直喷管时,不能实现向预爆管出口截面上游传播的爆震燃烧;当预爆管出口扩张角为45°时,可以实现爆震波在主爆管内向衍射面上、下游传播,研究结果获得的爆震波衍射特性得到了试验验证.
In order to achieve successful transition of detonation wave from the pre-deto- nator to main detonation tube, numerical simulation was performed for the exits of different geometry shapes, and the diffraction characteristics of detonation wave were obtained from pre-detonator to main tube. The results show that when the pre-detonator has a straight noz- zle, the detonation waves cannot propagate upstream from the interface between the main combustor and pre detonator exit; when the pre-detonator exit has a 45-degree nozzle, the detonation wave can diffract to both sides in main eombustor. These results have been proved by laboratory experiments.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2010年第2期251-257,共7页
Journal of Aerospace Power
基金
国家自然科学基金(50776045)
关键词
脉冲爆震发动机
爆震
预爆器
数值模拟
pulse detonation engine （PDE）
detonation
pre-detonator
numerical simulation
