火炮后效期内弹底压力预估理论模型研究
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摘要
火炮后效期内弹丸在膛口高压火药燃气的作用下发生扰动,进而影响其外弹道特性。为提高射表的精准性并优化弹丸设计,开展了后效期内弹底压力的研究。针对传统计算流体力学(CFD)仿真耗时过长的不足,基于普朗特-迈耶膨胀波关系及等熵流动,建立后效期内弹底压力预估理论模型,并提出压力边界估计的修正模型。以某射击试验中测得的膛口数据为例进行仿真分析,将该模型与CFD三维模型仿真结果进行对比。结果表明:所提模型仿真结果与CFD模型仿真结果相差很小,但计算耗时显著减小,由约1. 5 h减小为不到1 s;研究成果为火控系统所需外弹道参数可提供一种快速计算方法,为射表编制和弹丸合理设计可提供理论参考依据。
The projectile is disturbed by high-pressure gas during aftereffect period,which affects its exterior ballistic characteristics. The change of pressure on the base of projectile during the aftereffect period is studied for improving the accuracy firing table and optimized design of projectile. As computational fluid dynamics( CFD) simulation takes a long time,a theoretical model based on Prandtl-Meyer wave and isentropic flow is established for predicting the pressure on the base of projectile,and a modified model of pressure boundary estimation is proposed. The muzzle dates measured in a firing practice test were analyzed. The results show that the simulated results of the proposed model and CFD 3 D model have less difference,but the calculating time of the proposed model is shorter,which is decreased from about1. 5 h to less than 1 s.
The projectile is disturbed by high-pressure gas during aftereffect period,which affects its exterior ballistic characteristics. The change of pressure on the base of projectile during the aftereffect period is studied for improving the accuracy firing table and optimized design of projectile. As computational fluid dynamics( CFD) simulation takes a long time,a theoretical model based on Prandtl-Meyer wave and isentropic flow is established for predicting the pressure on the base of projectile,and a modified model of pressure boundary estimation is proposed. The muzzle dates measured in a firing practice test were analyzed. The results show that the simulated results of the proposed model and CFD 3 D model have less difference,but the calculating time of the proposed model is shorter,which is decreased from about1. 5 h to less than 1 s.
引文
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[9]MATSUO S,TANAKA M,SETOGUCHI T,et al.Passive control of condensation shock wave in Prandtl-Meyer expansion flow[J].Journal of Thermal Science,2003,12(1):20-26.
[10]郑鑫.膛口流场及其对弹丸运动影响的研究[D].沈阳:沈阳理工大学,2010.ZHENG X.Muzzle flow field and its influence on the study of projectile motion[D].Shenyang:Shenyang Ligong University,2010.(in Chinese)
[11]尤国钊.中间弹道学[M].北京:国防工业出版社,2003:3-4.YOU G Z.Intermediate ballistics[M].Beijing:National Defense Industry Press,2003:3-4.(in Chinese)
[12]李子杰,王浩.膛口初始流场对火药燃气射流的影响[J].含能材料,2017,25(4):282-290.LI Z J,WANG H.Effect of precursor flow field of muzzle on the combustion gas jet flow of gun propellant[J].Chinese Journal of Energetic Materials,2017,25(4):282-290.(in Chinese)
[2]IRWIN L,SINGER,PETER Y,et al.Application of high-speed video and spectroscopy to railgun development[J].Materials and Manufacturing Processes,2012,27(8):846-851.
[3]BRYAN J,STEWARD,GLEN P,et al.Modeling midwave infrared muzzle flash spectra from unsuppressed and flash-suppressed large caliber munitions[J].Infrared Physics and Technology,2012,55(4):246-255.
[4]ERDOS J I,DELGUIDICE P.Gas dynamics of muzzle blast[J].AIAA Journal,1975,8(13):1048-1055.
[5]苏晓鹏,钱林方,戴劲松.带炮口装置时某火炮膛口流场数值仿真[J].计算机仿真,2009,26(9):15-18.SU X P,QIAN L F,DAI J S.Muzzle flow field simulation of gun with a muzzle attachment[J].Computer Simulation,2009,26(9):15-18.(in Chinese)
[6]郭则庆,姜孝海,王杨.后效期火药燃气加速弹丸的数值研究[J].高压物理学报,2012,26(5):564-570.GUO Z Q,JIANG X H,WANG Y.Numerical study of propellant gas accelerates projectile during after-effect period[J].Chinese Journal of High Pressure Physics,2012,26(5):564-570.(in Chinese)
[7]王杨,郭则庆,姜孝海.后效期火药气体流空过程数值模拟[J].火炮发射与控制学报,2009(3):63-67.WANG Y,GUO Z Q,JIANG X H.Numerical simulation of propellant gas emptying process in after-effect period[J].Journal of Gun Launch&Control,2009(3):63-67.(in Chinese)
[8]李子杰,王浩,陈健伟.超高速弹丸膛口流场结构分析[J].哈尔滨工业大学学报,2017,49(10):53-59.LI Z J,WANG H,CHEN J W.The muzzle flow field induced by hyper-velocity projectile[J].Journal of Harbin Institute of Technology,2017,49(10):53-59.(in Chinese)
[9]MATSUO S,TANAKA M,SETOGUCHI T,et al.Passive control of condensation shock wave in Prandtl-Meyer expansion flow[J].Journal of Thermal Science,2003,12(1):20-26.
[10]郑鑫.膛口流场及其对弹丸运动影响的研究[D].沈阳:沈阳理工大学,2010.ZHENG X.Muzzle flow field and its influence on the study of projectile motion[D].Shenyang:Shenyang Ligong University,2010.(in Chinese)
[11]尤国钊.中间弹道学[M].北京:国防工业出版社,2003:3-4.YOU G Z.Intermediate ballistics[M].Beijing:National Defense Industry Press,2003:3-4.(in Chinese)
[12]李子杰,王浩.膛口初始流场对火药燃气射流的影响[J].含能材料,2017,25(4):282-290.LI Z J,WANG H.Effect of precursor flow field of muzzle on the combustion gas jet flow of gun propellant[J].Chinese Journal of Energetic Materials,2017,25(4):282-290.(in Chinese)