摘要
针对火炮制退机流场一维计算模型无法全面、准确反映其内部流场特征的局限,建立了基于动网格的制退机实际结构二维计算模型。利用流体计算软件Fluent,对火炮后坐过程制退机内二维流动进行了数值模拟。采用动态层变方法结合Profile运动边界驱动机制实现网格区域运动,确保模型符合实际运动规律。对比计算压力与实际压力,结果表明该方法具有较高精度,模拟结果显示了制退机内压力、速度分布,并清晰地捕捉到其内部流场的瞬时变化,揭示了典型机构处漩涡的生成、运动、合并与分裂规律。研究结果为进一步完善制退机结构设计提供了理论支持。
Considering the limitation of the traditional one-dimensional model of flow field calculation in a gun recoil brake in reflecting its interior flow characteristics exactly,a two-dimensional model of flow field calculation is proposed based on dynamic mesh.Numerical simulation of flow field in a gun recoil brake is carried out by Fluent software.A dynamic layering method combined with Profile driven mechanism is applied in mesh zone movement.The model can reflect the real structure of a gun recoil brake and its interior flow characteristics.Comparing the calculated pressure with the actual pressure,the results indicate this method has high accuracy.The pressure and velocity distribution in a gun recoil brake and the instantaneous changes of interior flow field are obtained by the numerical simulation.The generation,movement,coalition and cleavage rules of spiral vortex in a typical structure are shown.The results can give theoretical support for the design of gun recoil brake structure.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2010年第4期533-536,546,共5页
Journal of Nanjing University of Science and Technology
关键词
制退机
流场
动网格
数值模拟
recoil brakes
flow fields
dynamic mesh
numerical simulation
