弹道学报2025，Vol.37Issue(3)：77-84,8.DOI:10.12115/ddxb.2024.04007
膛口流场对不同外形含能弹丸初始扰动的影响
Influence of Muzzle Flow Field on the Initial Disturbance of Energetic Projectile With Different Shapes
摘要
Abstract
The initial disturbance generated by the muzzle flow field directly impacts the firing accuracy and penetration capability of the energetic projectile.To investigate the influence mechanism of muzzle flow field on the initial disturbance of energetic projectile,three distinct 14.5 mm energetic projectile models with different aerodynamic configurations were designed.Based on the three-dimensional Navier-Stokes equations and employing a block-structured dynamic grid technique coupled with six-degree-of-freedom motion equations,numerical simulations were conducted.The research primarily focused on evolution characteristics of the muzzle flow field and the dynamic response mechanisms of the energetic projectile.The simulation results show that among the three projectile models,projectiles E2 and E3,featuring longer body and boat-tail sections,exhibit higher base pressure upon muzzle exit.This elevated pressure results from prolonged propellant gas interaction,extending the initial disturbance duration and contributing to higher muzzle velocities.The warhead,body and stern of projectile E3 are the longest and the largest,leading the highest peak flow-field pressure and maximum muzzle pressure,which will further affect the ballistic characteristics of the projectile.When nose lengths of projectiles E1 and E2 are identical,projectile E1 experiences an increased bow shock wave angle and consequently greater bow drag because of the shorter body and term sections.It leads to E1 achieving the lowest maximum Ma among the three models with worst penetration capability.关键词
含能弹丸/膛口流场/气动外形/初始扰动/动网格Key words
energetic projectile/muzzle flow field/aerodynamic shape/initial disturbance/dynamic mesh分类
军事科技引用本文复制引用
陈建伟,李子杰,王浩,何淼..膛口流场对不同外形含能弹丸初始扰动的影响[J].弹道学报,2025,37(3):77-84,8.基金项目
国家自然科学基金项目(12402268) （12402268）
