摘要
采用跨介质流固耦合的任意拉格朗日-欧拉方法(Arbitrary Lagrange-Euler,ALE)对高速弹体入水冲击过程展开研究.首先通过计算网格收敛性分析、入水加速度和空泡轮廓的对比验证,确认文中建立的计算模型和采用计算方法的合理性与准确性.随后,通过对典型弹体高速入水冲击特性的仿真,分析入水过程中流场压力变化和空泡演化过程.依据弹头外形和入水速度对高速入水冲击特性的影响结果分析,发现入水冲击载荷大小和空泡轮廓尺寸均与弹头空化器尺寸成正比.研究结果表明,在实际跨介质弹体的初步设计中,往往需要综合评估弹体头部材料与冲击特性、减阻性能以及弹体头型间的关联,为高速弹体入水的结构设计和运动稳定性分析提供有价值的参考.
In this paper,the Arbitrary Lagrange-Euler(ALE)method of cross-medium fluid-solid coupling is used to study the impact process of high-speed projectiles in water.First,through the analysis of the convergence of the computational grid,the comparison and verification of the water entry acceleration and the cavitation contour,the rationality and accuracy of the calculation model and method established in this paper are confirmed.Subsequently,the pressure change of the flow field and the evolution process of the cavitation during the entry of the water are analyzed,with the influence of head shape of the projectile and water-entry velocity being considered.It is found that the size of the water entry impact load and the size of the cavitation outline are proportional to the size of the warhead cavitation device.It is found that a comprehensive assessment of the relationship between the projectile head material and impact characteristics,drag reduction performance and projectile head should be conducted during the initial design of water-entry projectile.Then the assessment is able to provide valuable references for the structural design and motion stability analysis of such projectiles.
作者
范旭东
漆超
王旭
吕续舰
FAN Xudong;QI Chao;WANG Xu;LU Xujian(School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2022年第2期7-14,共8页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
国家重点实验室基金资助项目(6142604190302)
水下信息与控制重点实验室开放研究项目(2021-JCJQ-LB-030-05)。
