颗粒固结发射药作随行装药的应用研究

将颗粒固结发射药应用于随行装药技术,提出了一种新的随行装药方案。通过密闭爆发器与30 mm弹道炮试验,对该随行装药的点火延迟时间、力学强度、燃速和燃烧性能的稳定性进行了研究。结果表明,依托随行装药高力学强度,延迟机构可对随行装药点火延迟时间进行控制。初步验证了该随行装药的燃烧性能基本稳定。增加延迟机构的厚度、乙基纤维素(EC)含量,均可使随行装药点火延迟时间延长。增加随行装药的粘结剂含量、压制密度,均可使其力学强度增加、燃气释放速率降低。随行装药具有较高的燃速,粘结剂含量5%、压制密度1.5 g·cm-3时,随行装药燃速最大值是6/7发射药的46倍。主装药量113 g、延迟机构厚0.4 mm时,在最大膛压基本不变的情况下,随行装药在内弹道试验中的初速较标准弹丸初速增加73.3 m·s-1,增幅约8%。

Applied Study on the Grain Consolidation Propellant as Traveling Charge

As the grain consolidation propellant charge was applied to traveling charge technique, a new traveling charge scheme was presented.The ignition delay time, mechanical strength, burning rate and stability of combustion performance for traveling charge were studied by the closed bomb and 30 mm ballistic gun test.The results show that the ignition delay time of traveling charge can be controlled by the time delay unit which relying on its high mechanical strength.The experiment results verify preliminarily that the combustion performance of traveling charge is basically stable.The increasing of the time delay unit thickness and ethyl cellulose(EC) content can make the ignition delay time of traveling charge prolong.The increasing of the binder content and pressed density can make the mechanical strength increase and combustion gas release rate decrease for traveling charge.The traveling charge has higher burning rate.When the binder content and the pressed density of traveling charge are 5% and 1.5 g·cm^-3, respectively, the maximum burning rate of traveling charge is 46 times as fast as 6/7 propellant.When the main charge dose and the time delay unit thickness are 113 g and 0.4 mm, respectively, the muzzle velocity in interior ballistic test increases by 73.3 m·s^-1 with an increase range of about 8%, compared with the standard projectile under the condition that the maximum chamber pressure does not change basically.