电热增强型固体发射药火炮内弹道模拟研究

SIMULATIONS OF BOOST INJECTION ON BALLISTIC PROCESS OF THE SOLID PROPELLANT ELECTROTHERMAL CHEMICAL (SPETC) GUN

描述了消融毛细管中高压电弧放电下的等离子体形成、喷射和火炮内弹道过程；建立了脉冲功率源放电模型、消融毛细管放电模型、内弹道集总模型的耦合模型，并进行了数值求解．通过对膛内压力曲线形成特点的分析，提出了单脉冲点火、多脉冲增强燃烧的双喷管模型和常规固体药点火、多脉冲增强燃烧的单喷管模型．此外，将计算编码的各个模块的计算结果与试验结果及国外计算结果进行比较，它们一致性较好，说明了模型和计算编码的可靠性．在此基础上，通过改变一些参数对模型的敏感性进行了分析．本文对于电热发射技术中的毛细管设计和ＰＦＮ网络的电参数选择以及内弹道装药设计均具有一定的指导意义．

Some models are developed for studying high pressure discharges in ablative capillaries coupled with interior ballistics, including a lumped parameter model for high pressure discharges in ablative capillaries, an electric circuit model for PFN and lumped parameter model for interior ballistics. In the paper the numerical solutions for the coupled models are also presented. Two capillary model with one pulse for ignition and multi pulse for booster and one capillary model with conventional ignition and multi pulse for booster are applied to tailor the pressure history in the gun chamber at later ballistic phase. The consistency of the numerical results with experiments and references indicates that the models and numerical codes are reliable.