摘要
反舰武器战斗部爆破后产生高速破片具有极强的侵彻能力,而舰船液舱对吸收破片十分有效.掌握破片在液舱内的运动规律是解决高速破片有效打击和防护水舱合理设计矛盾的关键.高速钝形破片在液舱内运动主要受到压差阻力影响,文中运用FLUENT数值模拟破片在液舱内运动时的压差阻力,拟合出与雷诺数相关的阻力系数曲线,将此阻力系数引入到现有的压力方程中.在阻力方程的基础上建立运动微分方程,求得破片降到不同速度时的时间及运动距离;运用速度离散方法加以验证.含有雷诺数的阻力系数的压力方程更能准确、方便的计算破片的运动规律.
High-speed fragments from the exploding of anti-ship missile warhead have a strong penetrating power,and the liquid tank can absorb these fragments effectively.Therefore,the motion law of fragments in the liquid tank is the key to solve the contradiction between effective combat of high-speed fragments and reasonable design of protective tank.The motion of high-speed obtuse fragments in the liquid tank mainly affected by the pressure drag.The pressure drag of fragments in the liquid tank was simulated by FLUENT and the curve of resistance coefficient associated with Reynolds number was fitted and introduced into the present pressure equation.Based on the resistance equation,the motion differential equation was established to calculate the consumed time and motive distance of fragments in deceleration,which is verified by the velocity discrete method.The pressure equation including Reynolds resistance coefficient can calculate the movement law of fragments more accurately and conveniently.
作者
来曙光
徐双喜
吴卫国
孔祥韶
LAI Shuguang;XU Shuangxi;WU Weiguo;KONG Xiangshao(School of Transportation,Wuhan University of Technology,Wuhan,430063,China;Key Laboratory of High Performance Ship Technology of Ministry of Education,Wuhan University of Technology,Wuhan 430063,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2018年第2期288-291,297,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目资助(51509196)
关键词
流体力学
破片
阻力
运动规律
雷诺数
hydrodynamics
fragment
resistance
motion rule
Reynolds number
作者简介
来曙光(1991—):男,硕士生,主要研究领域为结构的安全与可靠性。
