磨料参数对准直磨料射流切割性能的影响

根据多相流体介质在准直管内有阻流动方程式数值分析了供料量和粒径对准直磨料射流中磨粒加速效果的影响。研究表明，磨粒速度随着供料量的增加而逐渐降低。磨料质量浓度小于９．５％时供粒量对磨粒速度影响不显著。不同的供料量对应着不同的最佳管长，粒径越小磨粒加速度越快，磨料射流的切割效果取决于磨粒速度和粒径大小，粗磨料略优于细磨料

Effect of Abrasive Parameters on Cutting Efficiency of Collimated Abrasive Water Jet

The effect of the diameter of particles and feed rate of abrasive on the speed of the particles in collimated abrasive water jet (CAWJ) is analyzed by calculational methods for the multiphase fluid with energy loss in the collimated pipe. Theoretical and experimental results show that the particle speed increases with decreasing feed rate, and not striking as abrasive concentration is less than 9.5%. There is an optimal relationship between the length of the collimated pipe and feed rate of abrasive. The smaller the size of particles is the higher the speed of particles is. They also show that the cutting efficiency of CAWJ is dependent on the speed and diameter of particles, and larger size abrasive is better than smaller size ones. [WT5HZ]