超大口径平衡炮膛口流场数值仿真与流动特性分析  

Numerical Simulation and Flow Characteristics of Muzzle Flow Field in Ultra Large Caliber Propelling Gun

作　　者：王美懿[1] 王浩[1] WANG Meiyi WANG Hao(Energy and Power Engineering College, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《火炮发射与控制学报》2017年第2期15-19,共5页Journal of Gun Launch & Control

摘　　要：基于有限体积法,采用二维轴对称标准k-ε湍流模型并结合动网格分层技术,以某大口径、高射速、大质量的平衡炮为例建立了膛口流场模型,利用二维轴对称气体动力学模型来计算弹前气体及膛口流场。模拟了膛口直径为480 mm平衡炮,在900 m/s发射速度下的膛口流场特性,仿真结果与试验中高速录像所拍摄到的燃气比较,结果符合相对良好。分析了膛口形成的马赫盘、冲击波等发展过程;并尝试了不含初始流场时情况与其作对比,发现初始流场对大质量、高射速的火炮膛口流场具有很大的影响,不可忽略。It has been presented to calculate pre-projectile gas and muzzle flow field, taking some large- diameter, high-speed and high-mass as an example. A 2-D axisymmetic muzzle flow field model was established based on the finite volume method through the use of standard k-s turbulence model and combined with structured dynamic grid based on layering method. Taking the 480 mm balanced gun as an example, the property of muzzle flow field is studied at the speed of 900 m/ s. The simulated numerical results are in good agreement with the burning gas photographs shot in high speed. An anal-ysis was made of the formation and development process of Mach disk, shock waves and etc. And a comparison was made of the condition which doesnt contain the initial flow field. It was found that the initial flow field has a great influence on the muzzle flow field for high-mass and high-speed propelling gun, which cannot be overlooked.

关 键 词：流体力学 膛口流场 数值模拟 压力波 

分 类 号：TJ012[兵器科学与技术—兵器发射理论与技术]