摘要
采用理论分析和数值仿真的手段,研究液体动力黏度对液态复合胞抗射流侵彻性能的影响。理论分析结果表明,影响液体当前动力黏度的因素有当前的瞬时压强、温度以及液体初始动力黏度,温度和瞬时压强对动力黏度的影响是间断不连续的,液体初始动力黏度是当前动力黏度的放大因子。数值仿真结果表明:随着液体初始动力黏度的增大,液体受到的等效应力增大;液态复合胞吸收的能量增大,表现为液体内能增大、胞的内能增大;扩孔形状严重变化,射流头部变钝变粗;射流头部速度降低,直到不能继续侵彻。数值仿真体现的干扰规律与理论分析结果一致,充分证明液体动力黏度对液态复合胞抗射流侵彻性能的影响。
By means of theoretical analysis and numerical simulation, the effects of liquid dynamic viscosity on the jet penetration resistance of liquid composite cell were studied. The theoretical analysis results show that the factors affecting the current dynamic viscosity of liquid are the current pressure, the current temperature and the initial dynamic viscosity of liquid. And the effect of current temperature and current pressure on the current dynamic Viscosity is discontinuous. The initial dynamic viscosity of liquid is the amplification factor of current dynamic viscosity. The numerical simulation results show that the equivalent stress of liquid increases with the increase of the initial dynamic viscosity of liquid, the energy absorbed by the liquid composite cell increases, which shows that the internal energy of liquid increases and the internal energy of cell increases. The shape of the reaming hole changes seriously and the jet head becomes obtuse and thicker, the velocity of jet head slows until the penetration cannot continue. The interference rule embodied in the numerical simulation is consistent with the theoretical analysis result, which fully proves the influence of liquid dynamic viscosity on the jet penetration performance of liquid composite cell.
作者
赵昌方
刘长瑞
ZHAO Changfang;LIU Changrui(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Chemistry and Material Science,Ludong University,Yantai 264025,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2018年第6期88-91,共4页
Ordnance Material Science and Engineering
关键词
流体力学
动力黏度
液态复合胞
射流
侵彻
压强
温度
hydrodynamics
dynamic viscosity
liquid composite cell
jet
penetration
pressure
temperature
