点火药量对发射药燃烧性能的影响

以硝化棉（NC）为点火药，装药密度为0．12 g／cm3，编号为1＃、2＃、3＃、4＃4种发射药为研究对象，采用密闭爆发器实验测试方法，研究点火压力的改变对发射药燃烧性能的影响。研究表明：随着点火压力的升高，发射药的点火延迟期和燃烧时间均缩短；点火压力越高，基于L－B曲线的燃烧渐增性也更好；4种发射药基于ψ－I／I′K曲线的燃烧渐增性强弱顺序为4＃＞1＃＞2＃＞3＃。

Effect of Changing Ignition Dosages on Combustion Properties of Propellants

The influence of the changing ignition pressure on the combustion properties was researched. The experiment was carried out by the closed bomb test using four kinds of propellants(1#、2#、3#、4#)and nitrocellulose (NC)as ignition composition with the charging density of 0.12 g/cm3 .The results show:the propellant ignition delay and combustion time is shortened with the increase of ignition pressure;Under higher ignition pressure,progressive burning based on the dynamic activity curve is also strengthened;The progressive burning order based onψ-I/I′K curves of the four propellants is 4#>1#>2#>3#.