弹道学报2017，Vol.29Issue(1)：51-56,6.
高速射弹出水过程中水弹道问题研究
Study on the Trajectory of High-speed Projectile Exiting From Water
摘要
Abstract
Based on the developed experimental device for high-speed projectile exiting from water,the development process of the supercavity,shedding and its interaction with free-surface during exiting from water of high-speed projectile were observed by a high speed camera.Based on the measured experimental data,the cavitation number σ and the drag coefficient Cd of the underwater body were calculated,and the polynomial fitting-formula of σ and Cd were given by referring to the formulas of Reichardt,Munzner and Logvinovich.A general correlation relationship between σ and Cd was obtained.If an angle of attack of the slender body presents during exiting from water,the collapse of asymmetric cavity can lead a deflection of trajectory.Increasing the aspect ratio and length of the body,the drag of the underwater body can be reduced.By using the FLUENT software and VOF method,the three-dimensional flow field of exiting-from-water process was numerically simulated.The computational results are in good agreement with the experimental results.An example for the deflection of underwater trajectory during exiting from water was given.The result shows that the collision and slippage between the underwater projectile and supercavity wall can lead to the deflection of underwater trajectory.关键词
超空泡/水弹道/高速射弹/射弹出水/阻力系数/数值模拟Key words
supercavitation/underwater trajectory/high-speed projectile/projectile exiting from water/drag coefficient/numerical simulation分类
数理科学引用本文复制引用
侯健,施红辉,孙亚亚,高聚瑞..高速射弹出水过程中水弹道问题研究[J].弹道学报,2017,29(1):51-56,6.基金项目
浙江省自然科学基金项目(LY16A020003) （LY16A020003）
"十三五"海军装备预研项目 （）
