摘要
为了探索异形截面壳体的燃料抛撒规律,采用实验及数值模拟方法对圆形和扇形壳体结构的燃料抛撒规律进行了研究。实验使用无人机记录2种壳体结构的燃料抛撒过程,获得了2种壳体的云雾发展规律;并基于光滑粒子流体动力学法(smooth particle hydrodynamic method,SPH)和拉格朗日(Lagrange)方法对圆形和扇形壳体的燃料抛撒初期过程进行数值模拟,获得了中心分散药爆轰后1ms内的壳体失效情况及燃料速度矢量。结果表明:采用数值模拟结合无人机拍摄方法可以获得异形截面壳体全过程的燃料抛撒规律,云雾初期速度梯度的存在对云雾发展有很大影响,云雾形态是冲击波到达时间和壳体失效综合作用的结果。使用SPH和Lagrange接触计算能很好地应用于异形壳体燃料抛撒研究。
In order to explore the fuel dispersion law of special-section shell,experimental and numerical simulation method was used to study the fuel dispersion law of circular and sector shell structures.In the experiment,UAV was used to record the fuel dispersal process of two kinds of shells,and the development laws of cloud was obtained.Numerical simulation method was used to simulate the fuel dispersion process of circular and sector shell based on smooth particle hydrodynamic method(SPH)and Lagrange methods,and obtain the shell failure condition and velocity gradient of the center charge burst after 1 ms.The results show that the fuel dispersion law of the special-section shell can be obtained by using the method of numerical simulation and UAV shooting.The existence of velocity gradient at the early stage of cloud had a great influence on the cloud development,the cloud shape was the result of shock wave arrival time and shell failure.Numerical simulation using SPH and Lagrange contact calculation can be greatly applied to the study of fuel dispersion law of special-section shell.
作者
王永旭
欧凌霄
徐启明
邢化岛
李斌
解立峰
WANG Yongxu;OU Lingxiao;XU Qiming;XING Huadao;LI Bin;XIE lifeng(Nanjing University of Science and Technology,School of Safety Science and Engineering,Nanjing 210094,China)
出处
《兵器装备工程学报》
北大核心
2025年第8期226-232,共7页
Journal of Ordnance Equipment Engineering
基金
国家青年自然科学基金项目(12202202)。
