摘要
在边界条件和初始条件相同的情况下,分别改变圆锥带圆柱出口型喷嘴的圆锥段收缩角、喷嘴出口圆柱段长径比、喷嘴出口直径,用Fluent软件对圆喷嘴射流的速度衰减特性进行数值模拟和分析。模拟发现:在圆锥段收缩角为13°左右、喷嘴出口圆柱段的长径比为3左右时,射流核心段上的速度最大;随着喷嘴出口直径的减小,射流核心段上的速度不断增大,射流的切割性能也越来越好。数值模拟结果与实验结果完全一致。
Under the circumstance of identical boundary condition and initial condition, change respectively the contraction angle of conic segment of the cone-cylindrical exit typed nozzle, the length diameter ratio of cylindrical segment of nozzle exit and the diameter of nozzle exit, the numerical simulation and analysis were carried out on the speed attenuation characteristics of circular nozzle efflux by using the Fluent software. It has been discovered through simulation that while the contraction angle of the conical segment is around 13° and the length diameter ratio at the cylindrical segment of nozzle exit is about 3, tile speed at the core segment of efflux will be a maximum; along with the reduction of the diameter of nozzle exit, the speed at the core segment of efflux would increase unceasingly and the incision capability of efflux would getting better and better. The result of numerical simulation was totally coinciding with the result of experiment.
出处
《机械设计》
CSCD
北大核心
2007年第11期50-52,共3页
Journal of Machine Design
基金
安徽省高等学校青年教师科研资助计划自然科学资助项目(2005jq1108)
关键词
FLUENT
数值分析
流场
喷嘴几何参数
Fluent
numerical analysis
flow field
geometric parameter of nozzle
