Rheology of typical emulsifiers and effects on stability of emulsion explosives

Structure of emulsifiers or functionality and molecular weight determines its rheology,emulsification and stability of emulsion explosives.Rheology of typical emulsifiers was studied by automatic rheometer.Relations between rheology and structural properties of typical emulsifiers were analyzed.Experimental results show that viscosity of emulsifiers didn’t change with shear rate at room temperature and appeared properties of Newtonian fluid.Viscosity of different component emulsifiers declines with temperature in different modes.The change of strain doesn’t affect modulus of emulsifiers.Loss modulus increases linearly with the increase of frequency in oscillation and storage modulus does non-linearly.The higher the temperature is,the lower change amplitude of loss modulus with frequency will be.The emulsifiers with imide and amide functionality for emulsion explosives have better shear properties at high temperature and better shapingness and stability at room temperature than other emulsifiers with ester and Sorbin Monoleate(SMO)functionality.     

基于AUTODYN的乳化炸药水下爆炸能量分布的数值研究

基于AUTODYN软件建立了水下爆炸一维楔形模型,对空气不耦合装药结构下爆炸能量的输出进行研究。首先获得炸药冲击波压力以及气泡脉动随时间的变化曲线,进一步获知径向不耦合状态下水下爆炸的冲击波峰值压力、气泡最大半径以及脉动周期等数据,并最终得到了不耦合系数下冲击波能以及气泡能的变化情况。将计算结果与已有的水下爆炸实验结果进行了比较分析。结果表明,该计算结果与实验数据吻合较好,证明了利用数值计算手段可以实现定量化表征炸药输出能量随不耦合装药结构的变化规律。