摘要
为了了解高压水射流喷嘴结构参数变化对射流性能的影响,以出口扩张角、锥孔深度、入口收缩角作为参考因素,以喷射角、射流流量作为评价指标,对喷嘴各结构参数对射流性能的影响进行仿真分析和试验验证.按照单因素试验法和二次旋转正交组合设计的方法进行仿真试验,对试验结果进行显著性检验和方差分析,建立相应的回归方程.结果表明:锥孔深度是研究所涉及3个参考因素中对射流性能影响最为显著的因素,其显著性水平P<0.0001.采用响应面法、加权法对喷嘴结构参数进行寻优,发现当出口扩张角θ=68°、锥孔深度h=8 mm、入口收缩角α=65°时喷嘴的射流流量为27.8 L/min,喷射角的大小为45.3°.在此参数下喷嘴的喷射角和射流流量都得到了显著提升,喷嘴更易获得较好冲击压力和清洗效果.
Effects of structure parameters of a fan-shaped high-pressure nozzle on jet performance were simulated numerically and confirmed experimentally.The structural parameters included divergent angle,inner conical hole depth and convergent angle,and the jet performance was in terms of jet cove-rage angle and flow rate.The quadratic rotation orthogonal combination design method was utilized to set up design cases based on three structural parameters and their five levels,and then the cases were analyzed in Fluent.Finally,the CFD results were subject to statistical significance test and analysis of variance(ANOVA),consequently the corresponding regression equations were established.the optimized structural parameters were determined from these regression equations by using response surface method combined with weighting method.The results show that the effect of inner conical hole depth on the performance is the most significant(P<0.0001).When the divergent angle,inner conical hole depth,and convergent angle are 68°,8 mm and 65°,respectively,the flow rate and coverage angle increase to 27.8 L/min and 45.3°.Under this condition,the fan-shaped nozzle performance is significantly improved,and a better cleaning effect should be secured.
作者
梁博健
高殿荣
LIANG Bojian;GAO Dianrong(Eaton Fluid Power(Shanghai)Co.Ltd.,Shanghai 200131,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China)
出处
《排灌机械工程学报》
EI
CSCD
北大核心
2020年第1期69-75,共7页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(51375421)
关键词
扇形喷嘴
结构参数
数值模拟
优化
试验验证
fan-shaped nozzle
structure parameters
numerical simulation
optimize
experimental analysis
