摘要
基于Rayleigh-Plesset方程的单一介质可变密度混合模型,建立了自然空化流动的多相流模型,利用软件Fluent6.0对水下高速射弹空泡流动进行了数值模拟,计算了4种射弹模型在高速运动下的超空泡形态以及阻力系数,分析了射弹空化器直径、长细比和空化数等对射弹超空泡几何形态以及阻力特性的影响.仿真结果表明,随着空化数的增加,超空泡直径与长度减小;空化器直径对射弹阻力特性的影响显著;增加航行体的长细比,可以获得更小的阻力系数.
Based on single-fluid variable-density mixture model of Rayleigh-Plesset equation, natural multi-phase cavitating flow model was presented. Cavitation flow around underwater high-speed projectile was investigated through numerical simulation using Fluent 6.0. The supercavity form and drag coefficient of four kinds of projectile model under high-speed were calculated, and the effects of projectile cavitator diameter, the slenderness ratio, which represents the ratio of length to diameter and cavitation number on the characteristics of supercavity form and drag were analyzed. Simulation results show that the diameter and length of supercavity decrease with the increase of cavitation number, the effect of cavitator diameter on the drag of projectile is remarkable, and a smaller drag coefficient can be obtained by increasing the slenderness ratio of the projectile.
出处
《弹道学报》
EI
CSCD
北大核心
2009年第2期100-102,共3页
Journal of Ballistics
基金
国防重点实验室基金项目
关键词
高速射弹
自然超空泡
阻力系数
high-speed projectile
natural supercavity
drag coefficient
