Numerical Investigations on Acceleration of Projectile in Post-Effect Period
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摘要: 弹丸出膛后受高压火药燃气作用将继续加速并达到最大速度,后效期内弹丸增速大小及增速规律对于武器系统的设计和射击精度等具有重要的影响。采用基于动网格的有限体积方法,对不同装药量、弹丸质量和口径等9种条件下的发射过程进行了数值模拟,讨论了弹丸出膛后的受力状况和运动过程,对最大速度出现的时间、位置和增速量及其变化特点、影响因素等进行了详细的分析。计算结果显示,后效期弹丸增速率最大可超过3%,且加速过程受弹丸质量和装药量的影响很小。Abstract: After exiting the muzzle, the projectile continues being accelerated to maximum velocity by the propellant flow. The increasing of velocity in post-effect period has a great influence in the design of weapons and weapon firing precision. The process of firing under different conditions was numerically studied using finite volume method based on moving grids. Force on the projectile and the movement of the projectile were discussed. When and where the projectile reach its maximum velocity as well as the velocity increasing rate and the factors influences it was analyzed in detail. The result shows that the rate of increasing velocity may be over 3%, and is hardly affected by bullet mass and explosive charge.
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Key words:
- muzzle flow /
- post-effect period /
- projectile acceleration
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Editorial Board of Science and Technology Dictionary of Weapon Industry. Science and Technology Dictionary of Weapon Industry: Ballistics [M]. Beijing: National Defense Industry Press, 1991: 4-84. (in Chinese) 《兵器工业科学技术词典》编辑委员会. 兵器工业科学技术辞典: 弹道学 [M]. 北京: 国防工业出版社, 1991: 4-84. Ma S J, Zhang H. Study on the range systems of small caliber air bursting range fuzes [J]. Journal of Projectiles, Rockets, Missles and Guidance, 2004, 24(4): 338-344. (in Chinese) 马少杰, 张河. 小口径空炸定距引信的定距体制研究 [J]. 弹箭与制导学报, 2004, 24(4): 338-344. Fan W T. Implementation study on burst point turns-counting control technique of W fuze [D]. Nanjing: Nanjing University of Science and Technology, 2010. (in Chinese) 范文涛. 计转数炸点控制技术在W型引信中的应用研究 [D]. 南京: 南京理工大学, 2010. Cayzac R, Carette E, de Roquefort T A. Intermediate ballistic computations and validations [A]//17th International Symposium on Ballistics [C]. Midrand, South Africa, 1998: 1-8. Gopalapillai R, Kim H D, Setoguchi T, et al. On the near-field aerodynamics of a projectile launched from a ballistic range [J]. J Mech Sci Tech, 2007, 21: 1129-1138. Lious M S. A sequel to AUSM: AUSM+ [J]. J Comput Phys, 1996, 129(2): 364-382. Yan C. Computational Fluid Dynamics Method and Application [M]. Beijing: Beijing University of Aeronautics and Astronautics Press, 2006: 124-131. (in Chinese) 闫超. 计算流体力学方法及应用 [M]. 北京: 北京航空航天大学出版社, 2006: 124-131 Jiang X H, Fan B C, Li H Z. Numerical investigation on the muzzle flow with dynamic mesh based on ALE equation [J]. Journal of Computational Mechanics, 2008, 25(4): 563-567. (in Chinese) 姜孝海, 范宝春, 李鸿志. 基于ALE方程的动网格膛口流场数值研究 [J]. 计算力学学报, 2008, 25(4): 563-567. Weng C S, Wang H. Computational Interior Ballistics [M]. Beijing: National Defense Industry Press, 2006: 1-38. (in Chinese) 翁春生, 王浩. 计算内弹道学 [M]. 北京: 国防工业出版社, 2006: 1-38 Wang Y, Guo Z Q, Jiang X H. Numerical simulation of propellant gas emptying process in after-effect period [J]. Journal of Gun Launch and Control, 2009, (3): 63-67. (in Chinese) 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.
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