改性单基发射药内弹道模型

Interior Ballistic Model of Modified Single-base Propellant

为研究改性单基发射药装药的内弹道特性,基于经典内弹道理论,建立了能够表征改性单基发射药燃烧特征的双气源项内弹道模型,制备了样品并进行了30mm火炮的内弹道试验验证.计算结果与试验结果相符合.通过模型计算,深入讨论了浸渍剂含量及分布、浸渍深度等因素对内弹道性能的影响.当浸渍含量分布函数为右抛物线类型时比左抛物线类型最大膛压降低了3MPa,初速提高了10m/s,实现了在较低最大膛压下更高初速的期望;浸渍深度在计算中出现临界值,当浸渍深度大于外层厚度的0.6倍时,能够得到初速增加而最大膛压不增加的内弹道效果.

In order to investigate the interior ballistic performance of Modified Single-Base Propellant（MSBP） charge,a interior ballistic model containing a item of double gas source,which is capable of expressing the burning characteristic of MSBP, was founded based on classical interior ballistics. The propellant samples were prepared,and the interior ballistic experiments of 30 mm gun were carried out to verify the model. The computational results are accordant with ex- perimental results. The deep discussion was also carried out. By the model computation, the influence of some factors on the interior ballistic performance was studied such as the content and distribution of dipping reagent, the dipping depth. Compared with a left type of parabola, the maximum chamber pressure decreases 3 MPa,and the muzzle velocity increases 10m/s when the distribution function of dipping reagent is a right type of parabola. The expectation of higher muzzle velocity under lower chamber pressure comes true. A critical value is present in the dipping depth calculation;when the dipping depth is 0.6 times greater than outer thickness,the interior ballistic effect that the maximum chamber pressure is kept invariable while the muzzle velocity is on the increase can be achieved.