以粒状高能硝胺发射药RGD7A-6/7药为基药,采用密闭爆发器和30 mm模拟弹道炮试验,研究了颗粒模压发射药模块的密度和基药的表面处理方法对其燃烧性能的影响.分析了不同模块的密度、不同表面处理基药的颗粒模压发射药的燃烧p-t曲线、L-B曲线特征,得到了模块的密度和基药的表面处理方法对颗粒模压发射药的燃烧性能的影响规律.研究结果表明:在一定密度范围内(1.0～1.5 g·cm-3),模压药越密实,燃烧渐增性越好；经过表面钝感、包覆后的基药压制成型的模压发射药MD7燃烧渐增性最好.内弹道试验结果表明,MD7在膛压低于空白药29.7 MPa的情况下,弹丸初速提高了6.6％,炮口动能提高了13.8％.%The effects of density of grain-molded gun propellant and surface treatment of based-propellant on combustion performance of the grain-molded gun propellant were studied by closed-bomb test and 30 mm simulation ballistic gun test using high energy grain nitramine propellant RGD7A-6/7 as based-propellant. The characteristics of p-t and L-B curves for grain-molded gun propellant with different modular densities and different surface treatment of based-propellant were analyzed. The influences of density and surface treatment on the combustion property of the grain-molded gun propellant were obtained. The results show that in the density range from 1.0 g ? Cm-3 to 1.5 g ? Cm-3,the higher the density of the grain-molded propellant is,the better its progressivity is. The progressivity of grain-molded gun propellant MD7 obtained with surface-deterred and then surface-coated for based-propellant is the best. The muzzle velocity of MD7 at chamber pressure of 29.7 Mpa increases by 6.6%. The muzzle kinetic energy increases by 13.8%.
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