紫外光诱导纳米颗粒胶体微射流碰撞特性（英文）

发布时间：2018-04-13 13:40

本文选题：纳米颗粒胶体 + 非淹没射流　；参考：《强激光与粒子束》2016年06期

【摘要】：采用流体力学模拟方法,建立了垂直非淹没射流的计算流体动力学模型,研究了在紫外光诱导纳米颗粒胶体射流中用直径D为500μm的微孔光-液耦合喷嘴进行抛光加工的冲击动力学,分析了非淹没射流条件下光-液耦合喷嘴内、外的流场分布情况及其对工件表面的喷射冲击特征,对紫外光诱导纳米颗粒胶体射流冲击动力学过程进行了理论描述。计算结果表明,在1MPa入射压力时,微孔光-液耦合喷嘴口TiO2胶体的喷射速度约为30m/s,其集束匀速喷射距离约为5mm。在此喷射距离时进行垂直喷射,在胶束与工件表面的冲击射流作用区域,其射流静压最大值分布在射流冲击作用中心,但射流动压及射流合成速度在此区域的截面分布呈"W"形状,射流动压及速度最大值出现在胶体射流束的外环直径约2mm处。
[Abstract]:By using CFD simulation method, a computational fluid dynamics model of vertical non submerged jet, studied by impact dynamics with a diameter of D coupled nozzle micropore light - 500 m liquid polishing the nanoparticle colloid jet in ultraviolet light, the analysis of non submerged jet under the condition of light liquid coupling nozzle, flow field distribution and characteristics of jet impingement on the surface of workpiece, the nanoparticle colloid jet dynamics induced by UV were theoretically described. The calculation results show that the 1MPa incident pressure, jet velocity coupling liquid nozzle micropore light port TiO2 colloid was about 30m/s, the uniform cluster distance is about vertical jet injection 5mm. on the jet distance, jet impingement in regional micelles and the surface of the workpiece, the maximum static pressure distribution in the jet impingement center, but the pressure of jet flow The section distribution of the jet synthesis velocity in this region is "W" shape, and the maximum value of the jet dynamic pressure and velocity appears at about 2mm of the outer ring diameter of the colloidal jet beam.

【作者单位】：兰州理工大学机电工程学院;
【基金】：supported by National Natural Science Foundation of China(51205180,51565031) China Postdoctoral Science Foundation(2013M532092)
【分类号】：TB306;O35

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