七孔变燃速发射药内弹道性能的数值计算  

Numerical Calculation of the Interior Ballistic Performances of the 7-Perforation Gun Propellant with Variable Burning Rate

作　　者：程山[1] 马忠亮[1] 代淑兰[1] 刘佳[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《火炸药学报》2014年第2期78-81,85,共5页Chinese Journal of Explosives & Propellants

基　　金：火炸药青年创新基金(40406010301)

摘　　要：基于经典内弹道理论建立了七孔变燃速发射药的内弹道模型。在Ф30mm火炮装填条件下,用C语言编写的计算程序,对标准七孔发射药以及不同内外层火药力和不同内外层燃速比的七孔变燃速发射药的内弹道性能进行了数值计算。结果表明,七孔变燃速发射药比标准七孔发射药具有更好的燃烧渐增性,在膛压变化较小的情况下,弹丸初速有较大提高,约5%左右。调节七孔变燃速发射药内外层火药力可以有效控制膛压和提高弹丸初速。随着内外层燃速比的增大,膛内最大压力和弹丸初速逐渐降低,燃烧分裂点和结束点向后推移,七孔变燃速发射药的内外层燃速比一般取2左右为宜。An interior ballistic model of the 7-perforation gun propellant with variable burning rate was established based on the classical interior ballistic theory. Under the filling condition of q530mm gun, the numerical calculation of interior ballistic performances for the standard 7-perforation gun propellant and the 7-perforation gun propellant with variable burning rate with different force capacity and different burning rate ratio of internal and external layer were carried out using a calculation program written by C language. The results show that the progressive combus- tion of the 7-perforation gun propellant with variable burning rate is superior to the standard 7-perforation gun pro- pellant. In the case of small chamber pressure change, the muzzle velocity is increased obviously by about 5~. The chamber pressure can be controlled effectively and the muzzle velocity can be enhanced by adjusting the force capacity of internal and external layer of the 7-perforation gun propellant with variable burning rate . With increasing the burning rate ratio of internal and external layer, the maximum chamber pressure and muzzle velocity decrease gradu- ally, meanwhile the combustion division point and end point shift backwards. Taking the burning rate ratio of inter- nal and external layer of the 7-perforation gun propellant with variable burning rate of about 2 is advisable.

关 键 词：经典内弹道 变燃速发射药 七孔药 数值计算 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]