破孔面积对燃气弹射性能影响机理分析  

Analysis on influence mechanism of damaged pore area to gas ejection performance

作　　者：王磊[1,2] 郭保全[2] 朱家萱[2] 黄通 高钦和 WANG Lei;GUO Baoquan;ZHU Jiaxuan;HUANG Tong;GAO Qinhe(College of Mechatronics Engineering,North University of China,Taiyuan 030051,China;Research Institute of Intelligent Weapons,North University of China,Taiyuan 030051,China;College of Missile Engineering,Rocket Force University of Engineering,Xi'an 710025,China)

机构地区：[1]中北大学机电工程学院,太原030051 [2]中北大学智能武器研究院,太原030051 [3]火箭军工程大学导弹工程学院,西安710025

出　　处：《固体火箭技术》2024年第2期285-292,共8页Journal of Solid Rocket Technology

摘　　要：为探究发射筒破损面积对燃气弹射过程的影响,采用RNG k-ε湍流模型、有限速率/涡耗散模型和动态分层网格技术,建立包含筒壁损伤的发射筒三维数值模型,在数值验证的基础上通过改变破孔直径,仿真得到不同破孔面积下发射筒内流场分布与内弹道参数。结果表明:在发射筒内部整体流场形态近似呈对称分布,但由于燃气产生附壁效应和旋转涡的出现,局部流场呈现非对称性;随孔径增大筒内压力减小,孔径为160 mm时,t_(0)时速度相比完整筒壁的速度下降高达13.17%,在设定的出筒条件下当孔径大于140 mm后不能满足出筒要求;进行各参数相关性分析时发现破孔面积与第一次压力峰值及t_(0)时速度之间呈负线性相关。To investigate the impact of damaged areas in the launch canister on the gas ejection process,a 3D numerical model of the launcher under wall damaged was established by means of the RNG k-εturbulence model,finite rate/eddy dissipation model,and dynamic layered grid technology.Based on numerical verification and by varying the pore diameter,the flow field distribution in the launch canister and internal ballistic parameters of the launch canister under different damaged area were simulated.The study results reveal that the overall flow field inside the launch canister is approximately symmetrically distributed,but due to the wall attachment effect and the occurrence of rotating vortices,the local flow field is asymmetrical.As the aperture increases,the pressure inside the canister decreases.Specifically,when the aperture reaches 160 mm,the velocity at t_(0) decreases by 13.17%compared to that under the intact canister.Moreover,under the given ejection conditions,the ejection requirements cannot be met when the aperture exceeds 140 mm.For analysis on various parameter correlation,the damaged pore area have negative linear correlation with the first peak pressure and velocity at t_(0).

关 键 词：燃气弹射 发射筒破损面积 初容室 内流场 内弹道 

分 类 号：TJ768[兵器科学与技术—武器系统与运用工程]