摘要
针对目前国内外水下航行体结构简单,稳定性较差的问题,基于重叠网格技术和6DOF动网格技术,提出一种两段式结构的超空泡枪弹。该枪弹采用两段式的斜肩结构,在水下航行时受到水阻力更小,具有较高的研究价值。为此,研究了3种不同弹头结构对超空泡枪弹水下运动过程的空泡形态、弹道及流体动力特性的影响。研究结果表明:不同结构弹丸水下航行时,平头弹丸产生2段空泡,尖头弹丸和圆头弹丸只生成1段空泡,圆头弹丸与斜肩的契合度更高;圆头弹丸的弹道稳定性更好,其次是平头弹丸,尖头弹丸的弹道稳定性最差;弹丸遇水初期,会产生一个阻力峰值,且随着弹丸的运动,阻力逐渐降低,圆头弹丸受外力的影响最小,尖头弹丸受外力影响程度最大。因此,圆头弹丸的水下弹道稳定性最优,减阻性能最佳,为超空泡枪弹的结构选择提供了一定的理论依据。
Aiming at the problems of simple structure and poor stability of underwater vehicles at home and abroad,a two-stage supercavitation gun was proposed based on overlapping grid technology and 6DOF dynamic grid technology.The projectile adopts a two-stage oblique shoulder structure and suffers less water resistance during underwater navigation,so it has high research value.To this end,the effects of three different warhead structures on the cavitation morphology,ballistic and hydrodynamic characteristics of supercavitation bullets during underwater motion were studied.The results show that the flat head projectile produces two stages of cavitation while the pointed head projectile and the round head projectile only produce one stage of cavitation.The fit between the round head projectile and the inclined shoulder is higher.The ballistic stability of round projectile is better,followed by flat projectile,and the ballistic stability of pointed projectile is the worst.At the initial stage when the projectile meets the water,it produces a resistance peak,and with the movement of the projectile,the resistance gradually decreases.The influence of external force on the round head projectile is the least,and the influence of external force on the pointed head projectile is the greatest.Therefore,the round head projectile has the best underwater ballistic stability and the best drag reduction performance,which provides a certain theoretical basis for the structure selection of supercavitation projectile.
作者
郝博
杨斌
陈丹丹
徐才宪
HAO Bo;YANG Bin;CHEN Dandan;XU Caixian(School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of Education,Northeastern University,Shenyang 110819,China)
出处
《兵器装备工程学报》
CAS
CSCD
北大核心
2024年第1期59-65,共7页
Journal of Ordnance Equipment Engineering
基金
河北省自然科学基金项目(E2019501085)
东北大学秦皇岛分校博士启动基金项目(XNY201808)。
关键词
弹头结构
超空泡枪弹
水下运动
空泡形态
弹道特性
head structure
supercavitation projectile
underwater motion
cavity shape
ballistic characteristics
