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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 the successful propagation of the detonating wave at the outlet of the pretones to the main squib, the numerical simulation is carried out for the different geometries of the preheat pipe exits, and the diffraction characteristics of the detonation wave propagating from the squib to the main squib are obtained. : When the pre-discharge pipe outlet is a straight nozzle, can not be achieved to the upstream of the pre-detonator outlet cross-section of the propagation of the detonation combustion; when the pre-expander outlet expansion angle of 45 °, the detonation wave can be achieved in the main detonator inner diffracting surface The propagation of the upper and lower reaches of the detonation wave obtained by the research results has been experimentally verified.