摘要
基于水射流切割头的物理模型,根据湍流射流的基本方程建立了喷头内部流场的二维数学模型。采用标准k-ε湍流模型并应用FLUENT软件对聚焦管内部流场进行数值模拟,研究聚焦管几何参数对纯水射流速度流场的影响。研究结果表明:聚焦管入口收缩角α、长径比l/d和出口直径d对聚焦管内部速度流场有显著影响,当α=20°、l/d=70时,聚焦管出口射流速度最大。
Based on the physic model of water jet cutting head,the two-dimensional mathematical model of flow field inside the cutting head was built using turbulent jet basic equation.The internal flow field of focusing tube was simulated using standard k-ε turbulence model based on FLUENT.The influence of the geometric parameters of focusing tube on distribution of water jet velocity field was researched.The results show that the contraction angle α,the ratio of length and diameter l/d,as well as the outlet diameter d of the focusing tube have a significant effects on the internal velocity field of water jet.When α = 20°,l/d=70,the outlet jet velocity of the focusing tube is maximum.
出处
《机床与液压》
北大核心
2011年第11期24-26,共3页
Machine Tool & Hydraulics
基金
四川省教育厅资助项目(09ZZ030/09ZA116/09ZB085)
关键词
水射流
聚焦管
射流速度
数值模拟
Water jet
Focusing tube
Jet velocity
Numerical simulation
