弹道学报2025，Vol.37Issue(1)：121-128,8.DOI:10.12115/ddxb.2023.11009
多排斜侧孔膛口制退器流场数值模拟
Numerical Simulation of Flow Field of Muzzle Brake with Multi-row Oblique-side-holes
摘要
Abstract
In order to accurately calculate the recoil efficiency of a certain aircraft gun with multi-row oblique-side-holes muzzle-brakes,the numerical simulation on muzzle flow-field was carried out,considering the effect of projectile on propellant gas expansion and the acceleration effect of oblique-side-holes on propellant gas.The correctness of this numerical simulation method was verified by comparing the numerical simulation results of the muzzle flow field of a 12.7mm weapon with experimental results.The two-phase-flow internal-ballistic model of 30 mm aircraft gun was calculated numerically,and the flow state in the bore while the projectile reaching the bore position was obtained under the initial condition.The three-dimensional N-S equations of the muzzle flow-field were established,taking into account the interaction between the projectile and the propellant gas.A three-dimensional moving-grid method combining a polyhedral mesh for the stationary region and a hexahedral structured mesh for the moving region was adopted to numerically simulate the three-dimensional transient flow of the propellant gas when the projectile passes through each row of oblique-side-holes,which was compared with the case without considering the projectile motion.The results show that the oblique-side-holes can introduce high-pressure propellant gas into the barrel and generate supersonic airflow from the oblique rear,thereby producing a large recoil impulse.The recoil efficiency reaches 38.4%.The projectile impedes the expansion of propellant gas,resulting in stronger conical oblique shock waves at the oblique-side-holes.As a result,more propellant gas is ejected from the oblique-side-holes,increasing the recoil impulse.Therefore,projectile motion must be considered in numerical simulations of this type of muzzle brake.This research provides reference for the design of new multi-row oblique-side-holes muzzle-brakes and the dynamic matching between cannons and aircraft.关键词
航炮/制退器/斜侧孔/动网格/三维流场/制退效率Key words
aircraft gun/muzzle brake/oblique side hole/dynamic mesh/three-dimensional flow field/recoil efficiency分类
军事科技引用本文复制引用
邱明,谢昊,宋杰,陶宇翔,廖振强..多排斜侧孔膛口制退器流场数值模拟[J].弹道学报,2025,37(1):121-128,8.基金项目
国家自然科学基金项目(52475108 （）
12072161) （）
