赵艳萍,卢义玉,葛兆龙,左伟芹,谭宏兵
ZHAO Yan-ping,LU Yi-yu,GE Zhao-long,ZUO Wei-qin,TAN Hong-bin(Chongqing Univercity

• 1:重庆大学

摘要(Abstract)：

为了优化总长度和出口直径被限制的喷嘴的内部结构,进行喷嘴内外流场数值模拟、喷嘴流量系数测试以及喷嘴对砂岩冲蚀深度的试验。对试验结果进行分析表明,各喷嘴射流轴心线上的速度在喷嘴的内部达到最大后开始减小;数值模拟结果和流量系数测试结果相吻合,即喷嘴外部射流速度最大的喷嘴流量系数也最大,该喷嘴的工作性能最好;在设计试验的喷嘴范围内,进口收缩角为30°,出口圆柱段长度为11mm的喷嘴性能最好,其对砂岩的冲蚀深度高出其他喷嘴的200mm~300mm。
In this experiment,the length and outlet diameter of nozzles which are designed are constant.The nozzles' flow are simulated,the flow coefficient of the nozzles are tested,and the experiment that how depth of the sandstone are eroded by the water jet done.By these experiments,the internal structure of the water jet nozzles are optimized.It indicated that the speed of water jets axis reaches the maximum in the nozzle and then decreases,the results of simulation and the flow coefficient of the testing are in agreement,which means that the flow coefficient of the nozzle,in whose exterior the speed of water jet is Maximum,are most,and the performance that nozzle' is the best.All the results show that the nozzle whose inlet's contraction angle is 30°and outlet' length which is columniform is 11mm performs best,by which erosion depth is more 200mm~300mm than by others.

关键词(KeyWords)： 水射流;喷嘴;试验研究;流速
water-jet;nozzle;experimental study;velocity

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50621403)

作者(Author): 赵艳萍,卢义玉,葛兆龙,左伟芹,谭宏兵
ZHAO Yan-ping,LU Yi-yu,GE Zhao-long,ZUO Wei-qin,TAN Hong-bin(Chongqing Univercity

参考文献(References)：

• [1]Tazibt A,Parsy F,Abriak N.Theoretical analysis of theparticle acceleration process in abrasive water jet cut-ting[J].Computational Materials Science,1996,5:243-254.
• [2]Chen F.L,Siores E.The effect of cutting jet variationon striation formation in abrasive water jet cutting[J].International journal of Machine Tool&Manufacture,2001,41:1479-1486.
• [3]李根生,熊伟,宋剑,等.高压水射流深穿透射孔产能影响因素[J].石油钻采工艺,2006,28(4):60-63.
• [4]Fowler G,Shipway P.H,Pashby I.R.Abrasive water-jet controlled depth milling of Ti6Al4V alloy-an inves-tigation of the role of jet-workpiece traverse speed andabrasive grit size on characteristics of the milled mate-rial[J].Journal of Materials Processing Technology,2005,161:407-414.
• [5]催俊奎,赵军,李国威,等.前混合式磨料水射流喷嘴外流场仿真与实验[J].煤炭学报,2009,34(3):410-414.
• [6]薛胜雄,武子全,陈正文,等.高压水射流技术工程[M].合肥:合肥工业大学出版社,2006.
• [7]王家楣,张志宏,马乾初.流体力学[M],大连:大连海事大学出版社,2002,3.
• [8]阴妍,鲍久圣,段雄.磨料水射流切割工艺参数的实验研究[J].机械设计与制造,2007,4:107-109.
• [9]Hans-J櫣rgen Odenthal,Herbert Pfeifer,Ina Lemanow-icz,Rainer Gorissen.Simulation of the submerged ener-gy nozzle-mold water model system using laser-opticaland computational fluid dynamics methods[J].Metal-lurgical and Materials Transactions B,2002,33(2):145-156.
• [10]阎秋生,张自强,唐延辉.磨料喷射微细加工应用基础研究—喷嘴设计及加工试验[J].金刚石与磨料磨具工程,2002,128:19-21.
• [11]Durbin S.G,Yoda M,Abdel-Khalik S.I,Initial Condi-tions and Near-Field Dynamics in Turbulent LiquidSheets[J].Flow,Turbulence and Combustion,2007,79(3):198-205.
• [12]王福军.计算流体动力学分析—CFD软件原理与应用[M].北京:清华大学出版社,2004.
• [13]李人宪.有限体积法基础[M].北京:国防工业出版社,2008.
• [14]Brian P,Whelan,Anthony,J.Robinson.Nozzle geome-try effects in liquid jet array impingement[J].AppliedThermal Engineering,2009,79:2211-2221.
• [15]Ramulu M.An Experimental and Numerical Study ofAbrasive Waterjet Generated Stress Fields[C].In:Pro-ceedings of the 9th American Waterjet conference,1997,173-188.
• [16]向文英,李晓红,卢义玉,等.淹没磨料射流的岩石冲蚀实验研究[J].中国矿业大学学报,2009,38(2):240-243.