摘要
为较准确地研究火炮发射时高温高压高速的燃气射流经由炮口制退器的流场,对基于动网格的炮口制退器两相流场进行数值模拟。利用FLUENT软件,采用光顺和重构的非结构动网格更新方法,使用结构非结构混合网格技术,建立炮口制退器的流场模型,对弹丸飞出炮口制退器过程中的膛口流场进行数值模拟,并对比分析了燃气射流中的固相颗粒与气相耦合的两相流场和单纯气相流场对炮口制退器的影响。计算结果表明:考虑了两相的流场与单纯气相流场在压强分布上存在明显的区别,可为后续炮口制退器的结构设计与优化研究提供一定的参考。
In order to accurately study the flow field of high-temperature,high-pressure and high-speed gas jet passing through muzzle brake during gun launching,the two-phase flow field of muzzle brake based on moving grid was numerically simulated.Using FLUENT software,the flow field model of muzzle brake was established by using smoothing and reconstructing unstructured dynamic mesh updating method and structured/unstructured hybrid mesh technology,and the effects of two-phase flow field coupled by solid particles and gas phase in gas jet and single gas phase flow field on muzzle brake were compared and analyzed.The results show that there are obvious differences in pressure distribution between two-phase flow field and pure gas-phase flow field,which can provide some reference for the structural design and optimization of muzzle brake.
作者
董靖宇
李志刚
于存贵
Dong Jingyu;Li Zhigang;Yu Cungui(School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing 210094,China)
出处
《兵工自动化》
2020年第6期65-68,共4页
Ordnance Industry Automation
关键词
炮口制退器
燃气射流
数值模拟
动网格
两相流
muzzle brake
gas jet
numerical simulation
dynamic grid
two-phase flow
