工程科学学报，第37卷，增刊1：29-34,2015年5月 Chinese Journal of Engineering,Vol.37,Suppl.1:29-34,May 2015 DOI:10.13374/j.issn2095-9389.2015.s1.006:http://journals.ustb.edu.cn 后混合磨料水射流除鳞喷嘴内部流场数值模拟 刘国勇)四，王宽宽”，陈欣欣2》，董栗明”，朱冬梅”，张少军” 1)北京科技大学机械工程学院，北京1000832)中国航天科工集团公司六院六O一所，呼和浩特010076 ☒通信作者，Email:iu666@usth.cdu.cn 摘要基于C℉D多相流欧拉模型，针对后混合式磨料水射流除鳞喷嘴中磨料与水混合均匀性差、射流能量利用率低的缺 点，应用F山t软件对磨料侧进式、切进式和平行多射流式3种进料方式的喷嘴进行三维数值模拟，通过喷嘴内部流场速度 矢量图分析了3种进料方式下高压水与磨料的作用机理，并通过磨料体积分数云图比较了流场的均匀性.结果表明：与磨料 侧进式喷嘴相比，磨料切进式和平行多射流式喷嘴能够改善磨料与水的混合效果，使流场内磨料分布均匀.但切进式喷嘴会 增加喷嘴内部的磨损，需要采用更耐磨的材料.与前两种喷嘴相比，平行多射流式喷嘴可得到磨料与水最好的混合均匀性， 实际应用中还可以根据需要对水射流的流量及作用方式进行调节. 关键词后混合：磨料水射流：均匀性：进料方式：数值模拟 分类号TG142.71 Numerical simulation of internal flow field for post-mixed abrasive water jet descaling nozzle LIU Guo-yong,WANG Kuan-kuan",CHEN Xin-xin,DONG Li-ming,ZHU Dong-mei,ZHANG Shao-jun 1)School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)The 601 Institute,the 6hAcademy,China Aerospace Science and Industry,Hohhot 010076,China Corresponding author,E-mail:gy_liu666@ustb.edu.cn ABSTRACT For the shortcomings,such as low efficiency of jet energy and poor uniformity of water and abrasive in the post-mixed abrasive water jet descaling nozzle,three kinds of structures of the nozzle were put forward:the side feed nozzle,the tangential feed nozzle,and the parallel multi-jet nozzle.Based on the CFD Eulerian multiphase flow model,the 3-dimensional numerical simulation of the three kinds of structures was conducted with the FLUENT software.And the acting mechanism of the high-pressure water with the abrasive was analyzed through the velocity vector of the flow field inside the nozzle.The uniformity of the flow field was compared by analyzing the volume fraction contours of abrasive.Results show that compared with the side feed nozzle,the tangential feed nozzle and the parallel multi-jet nozzle can improve the mixing effect and obtain a rather uniform abrasive distribution.Whereas,the tangential feed nozzle can augment the internal wear of the nozzle,which needs a kind of more wear-resistant material.Compared with the former two structures,the mixing effect of the parallel multi-jet nozzle is perfect and the water jet flow as well as the acting mode could be ad- justed according to the need in practical application. KEY WORDS post-mixing:abrasive water jet;uniformity:feeding method;numerical simulation 磨料水射流(abrasive water jet,AW叮J)技术，是二十 力四.磨料射流以其独特的优势在工业清洗、除锈及 世纪八十年代迅速发展起来的一种新型高效水射 切割方面有着广泛的应用.目前，已逐渐采用磨料水 流四.磨料射流以水为载体，磨料微粒被高压水加速. 射流除鳞系统代替酸洗除鳞系统对冷轧带钢进行除 由于磨料的加入，大大提高了射流的冲击力和磨削 鳞.喷嘴是磨料水射流除鳞的关键部件之一，其作用 收稿日期：201501一11工程科学学报，第 37 卷，增刊 1: 29--34，2015 年 5 月 Chinese Journal of Engineering，Vol． 37，Suppl． 1: 29--34，May 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． s1． 006; http: / /journals． ustb． edu． cn 后混合磨料水射流除鳞喷嘴内部流场数值模拟 刘国勇1) ，王宽宽1) ，陈欣欣2) ，董栗明1) ，朱冬梅1) ，张少军1) 1) 北京科技大学机械工程学院，北京 100083 2) 中国航天科工集团公司六院六○一所，呼和浩特 010076  通信作者，E-mail: gy_liu666@ ustb． edu． cn 摘 要 基于 CFD 多相流欧拉模型，针对后混合式磨料水射流除鳞喷嘴中磨料与水混合均匀性差、射流能量利用率低的缺 点，应用 Fluent 软件对磨料侧进式、切进式和平行多射流式 3 种进料方式的喷嘴进行三维数值模拟，通过喷嘴内部流场速度 矢量图分析了 3 种进料方式下高压水与磨料的作用机理，并通过磨料体积分数云图比较了流场的均匀性． 结果表明: 与磨料 侧进式喷嘴相比，磨料切进式和平行多射流式喷嘴能够改善磨料与水的混合效果，使流场内磨料分布均匀． 但切进式喷嘴会 增加喷嘴内部的磨损，需要采用更耐磨的材料． 与前两种喷嘴相比，平行多射流式喷嘴可得到磨料与水最好的混合均匀性， 实际应用中还可以根据需要对水射流的流量及作用方式进行调节． 关键词 后混合; 磨料水射流; 均匀性; 进料方式; 数值模拟 分类号 TG142. 71 Numerical simulation of internal flow field for post-mixed abrasive water jet descaling nozzle LIU Guo-yong1)  ，WANG Kuan-kuan1) ，CHEN Xin-xin2) ，DONG Li-ming1) ，ZHU Dong-mei 1) ，ZHANG Shao-jun1) 1) School of Mechanical Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) The 601st Institute，the 6th Academy，China Aerospace Science and Industry，Hohhot 010076，China  Corresponding author，E-mail: gy_liu666@ ustb． edu． cn ABSTRACT For the shortcomings，such as low efficiency of jet energy and poor uniformity of water and abrasive in the post-mixed abrasive water jet descaling nozzle，three kinds of structures of the nozzle were put forward: the side feed nozzle，the tangential feed nozzle，and the parallel multi-jet nozzle． Based on the CFD Eulerian multiphase flow model，the 3-dimensional numerical simulation of the three kinds of structures was conducted with the FLUENT software． And the acting mechanism of the high-pressure water with the abrasive was analyzed through the velocity vector of the flow field inside the nozzle． The uniformity of the flow field was compared by analyzing the volume fraction contours of abrasive． Results show that compared with the side feed nozzle，the tangential feed nozzle and the parallel multi-jet nozzle can improve the mixing effect and obtain a rather uniform abrasive distribution． Whereas，the tangential feed nozzle can augment the internal wear of the nozzle，which needs a kind of more wear-resistant material． Compared with the former two structures，the mixing effect of the parallel multi-jet nozzle is perfect and the water jet flow as well as the acting mode could be ad￾justed according to the need in practical application． KEY WORDS post-mixing; abrasive water jet; uniformity; feeding method; numerical simulation 收稿日期: 2015--01--11 磨料水射流( abrasive water jet，AWJ) 技术，是二十 世纪八十年代迅速发展起来的一种新型高效水射 流［1］． 磨料射流以水为载体，磨料微粒被高压水加速． 由于磨料的加入，大大提高了射流的冲击力和磨削 力［2］． 磨料射流以其独特的优势在工业清洗、除锈及 切割方面有着广泛的应用． 目前，已逐渐采用磨料水 射流除鳞系统代替酸洗除鳞系统对冷轧带钢进行除 鳞． 喷嘴是磨料水射流除鳞的关键部件之一，其作用