基于fluent的一级气体炮内弹道研究
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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.
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.
引文
[1] DENNY M. Internal ballistics of an gas gun[J]. Phys.Teach,2011,49:81-83.
[2]赵俊利,高跃飞.气体炮实用内弹道技术研究[J].太原理工大学学报,2003(3):288-290.
[3]李锋,拜云山,冯晓伟.一级气体炮内弹道方程修正及验证[J].弹道学报,2016,28(1):14-18.
[4] ROHRBACH Z J,BURESH T R,MADSEN M J. Modeling the exit velocity of a compressed gas gun[J],Am. J. Phys.,2012,80(1).
[5]丁廷哲.有限容积高压气源高效膨胀技术研究[D].南京:南京理工大学,2017.
[6]温正. fluent流体计算应用教程[M].北京:清华大学出版社,2013.
[7]张师帅. CFD技术原理与应用[M].武汉:华中科技大学出版社,2016.
[8]张小兵.枪炮内弹道学[M].北京:北京理工大学出版社,2014.
[9]王新月.气体动力学基础[M].西安:西北工业大学出版社,2006.
[10]王焕然.一种新型压缩空气储能系统理论分析[J].南方能源建设,2015(2):16-19,56.
[11]刘海刚.杀伤元气动模拟发射技术研究[D].太原:中北大学,2017.
[12]赵俊利,曹锋.气体炮实用内弹道方程及应用[J].火炮发射与控制学报,2003(3):48-51.
[13]庞博,尚彬彬,张佳俊,等.阀控气体炮内弹道建模及实验研究[J].兵器装备工程学报,2018(9):51-53.
[2]赵俊利,高跃飞.气体炮实用内弹道技术研究[J].太原理工大学学报,2003(3):288-290.
[3]李锋,拜云山,冯晓伟.一级气体炮内弹道方程修正及验证[J].弹道学报,2016,28(1):14-18.
[4] ROHRBACH Z J,BURESH T R,MADSEN M J. Modeling the exit velocity of a compressed gas gun[J],Am. J. Phys.,2012,80(1).
[5]丁廷哲.有限容积高压气源高效膨胀技术研究[D].南京:南京理工大学,2017.
[6]温正. fluent流体计算应用教程[M].北京:清华大学出版社,2013.
[7]张师帅. CFD技术原理与应用[M].武汉:华中科技大学出版社,2016.
[8]张小兵.枪炮内弹道学[M].北京:北京理工大学出版社,2014.
[9]王新月.气体动力学基础[M].西安:西北工业大学出版社,2006.
[10]王焕然.一种新型压缩空气储能系统理论分析[J].南方能源建设,2015(2):16-19,56.
[11]刘海刚.杀伤元气动模拟发射技术研究[D].太原:中北大学,2017.
[12]赵俊利,曹锋.气体炮实用内弹道方程及应用[J].火炮发射与控制学报,2003(3):48-51.
[13]庞博,尚彬彬,张佳俊,等.阀控气体炮内弹道建模及实验研究[J].兵器装备工程学报,2018(9):51-53.