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Al/KClO_4点火器的输出性能是火工分离装置总体设计的关键参数。为了更准确地描述Al/KClO_4点火器的输出性能,通过修正经典内弹道方程组假设,引入火药力修正系数,建立了改进Al/KClO_4内弹道分析模型。编写Matlab数值求解算法,计算了密闭爆发器内Al/KClO_4点火器压力峰值、压力上升时间和单位面积冲量等参数,结合实验分析了这些参数随药量和空腔容积的变化规律,计算结果与实验结果吻合较好。研究表明,Al/KClO_4点火器产生的压力峰值随药量的增加而增大,随空腔容积的增加而减小,在小容腔(<5 m L)范围内,空腔容积增加1倍,压力峰值下降约40%.
The output of the Al / KClO_4 igniter is a key parameter in the overall design of the turbo-unit. In order to describe the output performance of Al / KClO_4 igniter more accurately, an improved Al / KClO_4 interior ballistic analysis model was established by modifying the assumption of classical interior ballistic equations and introducing the correction coefficient of the powder force. Compile Matlab numerical solution algorithm, calculate the peak pressure, pressure rise time and unit area impulse of Al / KClO_4 igniter in the closed-cell burst, and analyze the variation of these parameters with the volume and volume of the cavity, The experimental results agree well. The results show that the peak pressure of Al / KClO_4 igniter increases with the increase of dose and decreases with the increase of cavity volume, and the volume of cavity increases by a factor of 1 in the small cavity (<5 m L) , The peak pressure dropped about 40%.