基于fluent的一级气体炮内弹道研究  

Research on Internal Ballistics of Single-Stage Gas Gun Based on Fluent

作　　者：熊镐 王惠源[1] 王海旭 XIONG Hao;WANG Huiyuan;WANG Haixu(College of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China)

机构地区：[1]中北大学机电工程学院,太原030051

出　　处：《兵器装备工程学报》2019年第3期77-81,共5页Journal of Ordnance Equipment Engineering

摘　　要：为了研究气体炮内弹道过程中膛内气体运动状态以及阀门对气体炮内弹道的影响,采用计算流体力学(CFD)方法,在fluent中利用用户自定义函数读取弹体表面压力变化,利用动网格技术模拟弹丸膛内运动过程,分析阀门开启到弹丸出膛口时膛内气流变化情况;结果表明:无阀门气体炮内弹道过程中,膛内气体基本符合均匀分布假设;有阀门气体炮在内弹道初期,气流存在回流现象,弹底压力先快速上升后逐渐减小,并在一定范围内波动,最后逐渐趋于稳定;现有一级气体炮内弹道模型相比于仿真模型和实验结果有较大的误差,仿真结果与实验结果的一致性较高。In order to study the gas movement state of the gas in the internal ballistic process of the gas cannon and the influence of the valve on the internal ballistics of the gas cannon, the computational fluid dynamics (CFD) method was used to read the surface pressure change of the missile using the user-defined function in the fluent. Dynamic mesh technology was used to simulate the movement process of the projectile, and the change of the airflow in the sputum when the valve was opened to the blast opening was analyzed. The results show that during the internal ballistic process of the valveless gas cannon, the gas in the crucible basically conforms to the uniform distribution hypothesis;in the initial stage of the internal ballistics, the gas flow has a reflow phenomenon, and the bottom pressure of the bottom is rapidly increased and then gradually decreased, and within a certain range. The internal fluctuations gradually become stable. The existing first-stage gas gun internal ballistic model has larger errors than the simulation model and experimental results, and the consistency between the simulation results and the experimental results is high.

关 键 词：气体炮 内弹道 计算流体力学 弹底压力 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]