This paper presents the design, test and analysis of a scaled cylindrical blast chamber. The blast chamber is a one-fifth dimensional size replica of the full-scale blast chamber(Emily). The blast chamber is semi-conf...This paper presents the design, test and analysis of a scaled cylindrical blast chamber. The blast chamber is a one-fifth dimensional size replica of the full-scale blast chamber(Emily). The blast chamber is semi-confined as one end is open. The scaled blast chamber is used to test concepts for closing the open end and allows the gas to vent at the same time. ANSYS AUTODYN calculated the pressure time histories for different closure scenarios. Comparing the results suggested a viable scenario, namely a structure consisting of a circular disc and a frame positioned at the open end of the blast chamber. The structure and cylindrical blast chamber were subjected to scaled blast tests and the pressure results are presented and discussed.展开更多
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...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%.展开更多
文摘This paper presents the design, test and analysis of a scaled cylindrical blast chamber. The blast chamber is a one-fifth dimensional size replica of the full-scale blast chamber(Emily). The blast chamber is semi-confined as one end is open. The scaled blast chamber is used to test concepts for closing the open end and allows the gas to vent at the same time. ANSYS AUTODYN calculated the pressure time histories for different closure scenarios. Comparing the results suggested a viable scenario, namely a structure consisting of a circular disc and a frame positioned at the open end of the blast chamber. The structure and cylindrical blast chamber were subjected to scaled blast tests and the pressure results are presented and discussed.
文摘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%.
