前混合磨料水射流磨料颗粒加速机理分析  

Research on acceleration mechanism of abrasive in pre-mixed abrasive water-jet

作　　者：陆国胜[1] 龚烈航[1] 王强[1] 王敬涛 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007 [2]总装工程兵驻北京地区军事代表室,北京100071

出　　处：《解放军理工大学学报（自然科学版）》2006年第3期275-280,共6页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：为了提高前混合磨料水射流的切割效果,以固液两相流理论为基础,建立了磨料颗粒在前混合磨料水射流中不同阶段的运动受力模型,分析和研究了磨料颗粒的加速机理和运动规律。理论研究表明,磨料颗粒在高压管路中加速不明显,主要加速过程是喷嘴收敛段、圆柱段和射流在大气中的核心段。数值计算结果证实了前混合磨料水射流切割同样的材料所需压力仅为后混合磨料水射流的1/10左右。In order to improve the cutting effect of pre-mixed abrasive water-jet, based on the theory of solid-liquid two-phase flows, the mathematic models of abrasive in various phases of pre-mixed abrasive water-jet were established, and the accelerative mechanism and moving rule were studied. The results show that abrasive in high pressure pipe is accelerated indistinctively, and mainly in nozzle＇s taper convergence segment and column segment. The numerical values show that the pressure of pre-mixed abrasive water-jet for cutting the same material is only 1/10 of sub-mixed abrasive water-jet approximately.

关 键 词：前混合磨料水射流 固液两相流 磨料颗粒 加速机理 

分 类 号：TP69[自动化与计算机技术—控制理论与控制工程]