摘要
对非淹没磨料射流中磨料颗粒的运动规律进行了仿真与切割实验研究。结果表明,磨料粒子与连续相的相互耦合会改变连续相的流场分布,使流场速度下降。磨料粒子90%以上的动能在喷嘴内获得,但在喷嘴内没有得到完全加速;切割物料的较佳磨料浓度值为4.5%～8.5%;对于喷嘴直径大于1 mm 的射流,磨料基本尺寸为φ0.15～0.3 mm 切割效果较好,对于喷嘴直径小于1 mm 的射流,磨料直径为喷嘴出口直径的1/3～1/4比较合适;磨料入口速度对出口速度的影响小,为了减小管路系统的堵塞,磨料罐至喷嘴段管路应尽量短并且最好竖直安装。
The movement rule of abrasive granules of non submerged abrasive jet is carried out simulation and experiment. The research result indicates that the intercoupling of abrasive granules and continuous phase can change the,flow field distribution of continuous phase and reduce the ,flow field velocity. Above 90% kinetic energy of abrasive granules is obtained in the nozzle, but the complete speedup is not gained. The better abrasive concentration.for cutting materials is at 4.5% - 8.5%. For the jet whose nozzle diameter exceeds lmm, when the basic dimension of abrasive is at Ф. 15 -0.3mm, the cutting effect is better. For the jet whose nozzle diameter is less than Imm, when the abrasive diameter is at 1/3- 1/4 of the nozzle exit, the effect is proper The velocity of abrasive inlet has a small effect to the velocity of abrasive outlet, and the pipeline.from abrasive jar to the nozzle segment should be as short as possible and be installed erectly in order to reduce the jam of the pipeline system.
出处
《矿山机械》
北大核心
2008年第24期31-34,共4页
Mining & Processing Equipment
基金
广东省自然科学资助项目(032360)
广东省教育厅自然科学资助项目(Z03077)
广西科学研究与技术开发计划资助项目(0731008)
关键词
高压水射流
磨料
仿真
切割实验
High pressure water jet
Abrasive
Simulation
Cutting experiment
