Study on Velocity and Shape of Micro-Charge-Driven Flyer
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摘要:飞片速度和形态对其冲击起爆性能有重要影响，采用光子多普勒干涉激光测试技术（PDV）和数值模拟方法，研究了加速膛直径、飞片厚度和飞片材料对叠氮化铅微装药驱动飞片速度和形态的影响规律。试验结果表明：飞片厚度一定时，存在一个最优加速膛直径（1.4mm）使飞片的稳定速度最大（2 050m·s-1）；最优加速膛直径下，飞片的稳定速度随飞片厚度增加而降低；飞片厚度相同时，铝飞片的稳定速度最大，钛飞片其次，不锈钢飞片最低。仿真结果表明，飞片材料为不锈钢时，30μm厚的飞片平整度最好；飞片厚度相同时，钛飞片的平整度和完整性最好。
Abstract:The velocity and shape of flyer have an important influence on its shock initiation performance. The effects of acceleration barrel diameter, flyer thickness and flyer material on the velocity and shape of lead azide micro-charge-driven flyer were studied by Photo Doppler velocimetry (PDV) and numerical simulation. The test results show that when the thickness of the flyer is constant, there is an optimal acceleration barrel diameter (1.4mm) to maximize the stable velocity of the flyer (2 050m·s-1). Under the condition of optimum accelerating barrel diameter, the steady velocity of flyer decreases with the increase of flyer thickness; At the same flyer thickness, the stable velocity of aluminum flyer is the highest, followed by titanium flyer, and the stable velocity of the stainless steel flyer is the lowest. The simulation results show that when the flyer material is stainless steel, the flyer with thickness of 30μm has the best flattest. At the same thickness, the titanium flyer has the best flatness and integrity.
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