前混合磨料水射流磨料混合腔流固耦合分析

Fluid-structure Interaction Analysis of Pre-mixed Abrasive Water Jet Abrasive Mixing Chamber

基于Solidworks软件对用于水射流切割机中的前混合磨料水射流磨料混合腔进行建模,结合流固耦合分析原理,利用Fluent软件进行混合腔腔体内部流场的数值模拟分析.比较腔体内部流场均匀性受侧进式进料方式和中进式进料方式的影响程度,分析高压水的入口角度、腔体收缩锥角度、磨料混合腔直径以及高压水入口位置对中进式进料方式腔体内部流场均匀性的影响.结果表明:在以相同进料速度进料时,中进式的出口磨料平均速度较侧进式要更高一些,更有利于磨料的充分加速;当高压水入口角度为37.5°,收缩锥角度为45°,磨料混合腔直径为50 mm,高压水入口位置为80 mm时流场的均匀性最佳.

The pre-mixed abrasive water jet abrasive mixing chamber was modeled by solidworks. Numerical simulation analysis was carried out on the internal flow field through Fluent in combination with fluid-structure interaction theory.The flow field uniformity within the cavity was compared between side feed and medium feed.Analyzed the influence of flow field uniformity by high pressure water entry angle,cavity contraction cone angle,the diameter of the abrasive mixing chamber and high pressure water inlet position of the medium feed chamber.The results showed that when feed in the same velocity,the average velocity of the medium feed export is much higher than the side feed,and the medium feed is in favor of the full speed up the abrasive.When entry angle of the high pressure water entry angle is 37.5°,contraction cone angle is 45°,diameter of abrasive mixing cavity is50 mm,the inlet position of high pressure water is 80 mm,the flow field uniformity is the best.