高压水除鳞喷嘴结构参数对喷嘴射流性能的影响
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摘要
为了进一步研究高压水除鳞喷嘴的射流性能,优化喷嘴的结构参数,选取出口扩张角、锥孔深度、入口收缩角作为参考因素,以喷射角和射流流量作为评价指标,对喷嘴各参考因素对射流性能的影响进行了仿真分析。结合正交试验的方法,对喷嘴各结构参数及其交互作用对其性能影响的显著性及重要性次序进行分析,获得最优的参数组合并对其进行了实验验证。结果表明:出口扩张角的增大会使喷射角减小但会使射流流量增加,锥孔深度的增加可以较为全面地提升喷嘴的射流性能,收缩角的增大会使得喷嘴的射流性能减弱,喷嘴的除鳞效果变差;3个参考因素中锥孔深度是对射流性能影响最大的因素;当出口扩张角为80°、锥孔深度为8mm、入口收缩角为65°时喷嘴的射流性能最优。通过将参数优化后的喷嘴的实验结果与原始喷嘴的实验结果对比发现,优化后喷嘴的喷射角由原始值35.7°提升至44.1°,射流流量的大小由原始值10.17L/min提升至28.3L/min。
In order to determine the structural parameters of the descaling nozzles and improve the descale effects,The numerical simulation method was used to analyze the effects of the nozzle divergence angle,the depth of inner cone hole,convergence angle on the nozzle spray angle and the volume flow rate.Herein,the orthogonal experiment method was adopted to simulate structural parameters and their interactions of the descaling nozzles and the significance and importance order of influence.Obtained the optimal combination of structural parameters was validated by experiments.The results show that when the divergence angels are increased,the nozzle spray angles will reduce but the volume flow rates will increase.When the depths of inner cone holes are increased,the nozzle jet performance will be comprehensively promoted.When the convergences are increased,the nozzle spray angles and the volume flow rates will be simultaneously reduced.The depths of inner cone holes are significantly correlated to the three factors,the optimal aggregative index may be obtained under the conditions of nozzle divergence angle is 80°,the depth of inner cone hole is 8 mm,the nozzle convergence angle is 65°.Under these conditions,the efficiency of the descaling nozzle performance is mostly improved.The experimental research designed by the optimized parameters show that the nozzle spray angle increases from 35.7°to 44.1°and the volume flow rate increases from 10.17 L/min to 28.3 L/min.
In order to determine the structural parameters of the descaling nozzles and improve the descale effects,The numerical simulation method was used to analyze the effects of the nozzle divergence angle,the depth of inner cone hole,convergence angle on the nozzle spray angle and the volume flow rate.Herein,the orthogonal experiment method was adopted to simulate structural parameters and their interactions of the descaling nozzles and the significance and importance order of influence.Obtained the optimal combination of structural parameters was validated by experiments.The results show that when the divergence angels are increased,the nozzle spray angles will reduce but the volume flow rates will increase.When the depths of inner cone holes are increased,the nozzle jet performance will be comprehensively promoted.When the convergences are increased,the nozzle spray angles and the volume flow rates will be simultaneously reduced.The depths of inner cone holes are significantly correlated to the three factors,the optimal aggregative index may be obtained under the conditions of nozzle divergence angle is 80°,the depth of inner cone hole is 8 mm,the nozzle convergence angle is 65°.Under these conditions,the efficiency of the descaling nozzle performance is mostly improved.The experimental research designed by the optimized parameters show that the nozzle spray angle increases from 35.7°to 44.1°and the volume flow rate increases from 10.17 L/min to 28.3 L/min.
引文
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[11]山天涯,黄芸,安琦.轧辊冷却用扇形喷嘴的射流性能[J].华东理工大学学报(自然科学版),2012,38(2):259-264.SHAN Tianya,HUANG Yun,AN Qi.Performance of Flat Fan Nozzle Jet Used in Roll Cooling System[J].Journal of East China University of Science and Technology(Natural Science Edition),2012,38(2):259-264.
[12]梁博健,高殿荣,毋少峰,等.关键结构参数对高压除鳞喷嘴性能影响的研究[J].液压与气动,2016(6):24-29.LIANG Bojian,GAO Dianrong,WU Shaofeng,et al.Influence of Key Structure Parameters on the Descaling Nozzle Performance[J].Chinese Hydraulics&Pneumatics,2016(6):24-29.
[13]林翔,刘桓龙,王国志,等.扇形喷嘴的低压射流特性研究[J].机床与液压.2015,43(3):164-167.LIN Xiang,LIU Huanlong,WANG Guozhi,et al.Study of Low-pressure Jet Characteristic of Fan Nozzle[J].Machine Tool&Hydraulics,2015,43(3):164-167.
[14]中华人民共和国工业和信息化部,中国国家标准化管理委员会.JB/T 12494-2015热轧用除鳞喷嘴[S].北京:中国标准出版社,2016.
[2]陈连生,卢裙玮,宋进英,等.钢板表面氧化铁皮缺陷形貌及产生原因分析[J].钢铁钒钛,2013,32(1):86-92.CHEN Liansheng,LU Junwei,SONG Jinying.Analysis on Appearance and Cause of Scale Defects on the Steel Plate Surface[J].Iron Steel Vanadium Titanium,2013,32(1):86-92.
[3]薛胜雄.高压水射流技术工程[M].合肥:合肥工业大学出版社,2006.XUE Shengxiong.High Pressure Waterjet Technology Engineering[M].Hefei:Hefei University of Technology Press,2006.
[4]禹言芳,李春晓,孟辉波,等.不同形状喷嘴的射流流动与卷吸特性[J].过程工程学报,2014,14(4):549-555.YU Yanfang,LI Chunxiao,MENG Huibo,et al.Flow and Entrainment Characteristics of Jet from Different Shape Nozzles[J].The Chinese Journal of Process Engineering,2014,14(4):549-555.
[5]汪朝晖,胡亚男,饶长健,等.自激振荡脉冲喷嘴空化效应及其射流形态的数值分析[J].中国机械工程,2017,28(13):1535-1541.WANG Zhaohui,HU Ya’nan,RAO Changjian,et al.Numerical Analysis of Cavitation Effects of Selfexcited Oscillation Pulse Nozzles and Jet Forms[J].China Mechanical Engineering,2017,28(13):1535-1541.
[6]高传昌,黄丹,马建娇,等.喷嘴几何参数对自激吸气脉冲射流性能影响的正交试验[J].排灌机械工程学报,2016,34(6):525-531.GAO Chuanchang,HUANG Dan,MA Jianjiao,et al.Orthogonal Experimental on Effect of Geometrical Parameters on Selfexcited Inspiration Pulsed Jet Nozzle Performance[J].Journal of Drainage and Irrigation Machinery Engineering,2016,34(6):525-531.
[7]刘国勇,王宽宽,陈欣欣,等.后混合磨料水射流除鳞喷嘴内部流场数值模拟[J].工程科学学报,2015,37(S1):29-34.LIU Guoyong,WANG Kuankuan,CHEN Xinxin,et al.Numerical Simulation of Internal Flow Field for Post-mixed Abrasive Water Jet Descaling Nozzle[J].Chinese Journal of Engineering,2015,37(S1):29-34.
[8] QIAO H J,GAO D R.Numerical Simulation and Analysis for Blow-off Flow Field of a Wet Skin Pass Mill[J].Applied Mechanics and Materials,2014,597:238-241.
[9] KERMANPUR A,EBNONNASIR A,HEDAYATI M.A Novel Analytical-artificial Neural Network Model to Improve Efficiency of High Pressure Descaling Nozzles in Hot Strip Rolling of Steels[J].Materials Science and Technology,2007,23(8):951-957.
[10] KERMANPUR A, EBNONNASIR A, YEGANEH A R K,et al.Artificial Neural Network Modeling of High Pressure Descaling Operation in Hot Strip Rolling of Steels[J].ISIJ International,2008,48(7):963-970.
[11]山天涯,黄芸,安琦.轧辊冷却用扇形喷嘴的射流性能[J].华东理工大学学报(自然科学版),2012,38(2):259-264.SHAN Tianya,HUANG Yun,AN Qi.Performance of Flat Fan Nozzle Jet Used in Roll Cooling System[J].Journal of East China University of Science and Technology(Natural Science Edition),2012,38(2):259-264.
[12]梁博健,高殿荣,毋少峰,等.关键结构参数对高压除鳞喷嘴性能影响的研究[J].液压与气动,2016(6):24-29.LIANG Bojian,GAO Dianrong,WU Shaofeng,et al.Influence of Key Structure Parameters on the Descaling Nozzle Performance[J].Chinese Hydraulics&Pneumatics,2016(6):24-29.
[13]林翔,刘桓龙,王国志,等.扇形喷嘴的低压射流特性研究[J].机床与液压.2015,43(3):164-167.LIN Xiang,LIU Huanlong,WANG Guozhi,et al.Study of Low-pressure Jet Characteristic of Fan Nozzle[J].Machine Tool&Hydraulics,2015,43(3):164-167.
[14]中华人民共和国工业和信息化部,中国国家标准化管理委员会.JB/T 12494-2015热轧用除鳞喷嘴[S].北京:中国标准出版社,2016.