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为了研究七孔发射药内外弧厚差异对其燃烧性能的影响,通过密闭爆发器静态燃烧试验及火炮发射药装药内弹道试验研究了内外弧厚一致性及弧厚偏差对高能低烧蚀叠氮硝胺七孔发射药燃烧性能的影响。结果表明,当发射药的内外弧厚差异较大时,密闭爆发器试验中发射药增面燃烧阶段结束点提前,增面燃烧阶段已燃百分数由85.46%降至70.76%,燃烧时间由23.40ms增至27.75ms;发射药燃烧时间随着温度变化的敏感性逐渐加大。装药发射试验中,当外弧厚大于内弧厚时,加大了装药的初速温度系数,初速温度系数由0.54m/(s·℃)增至0.78m/(s·℃),装药质量由9.4kg增至9.8kg,最大膛压由266.9MPa降至262.6MPa。
In order to study the influence of the difference of inner and outer arc thickness of seven holes propellant on its combustion performance, static combustion experiment of closed explosive and internal ballistic experiment of propellant charge were used to study the influence of inner and outer arc thickness consistency and arc thickness deviation on high energy and low ablation azide Effect of Nitramine Seven - hole Propellants on Combustion Performance. The results show that when the difference between the inner and outer arc thicknesses of the propellant is large, the end point of the combustion phase of the propellant is advanced ahead of the closed explosive test, the percentage of flare of the combustion phase increases from 85.46% to 70.76%, and the combustion time is 23.40ms Increased to 27.75ms; propellant burning time with the temperature sensitivity of the gradual increase. When the outer arc thickness is larger than the inner arc thickness, the initial velocity temperature coefficient of charge increases, the initial velocity temperature coefficient increases from 0.54m / (s · ℃) to 0.78m / (s · ℃) The mass of medicine increased from 9.4kg to 9.8kg, the maximum chamber pressure decreased from 266.9MPa to 262.6MPa.