超音速喷涂喷管数值模拟及结构优化  

Numerical Simulation and Structure Optimization of Supersonic Spray Nozzle

作　　者：李丽[1] 郭志成 刘玉田 李鹏[1] LI Li;GUO Zhicheng;LIU Yutian;LI Peng(School of Mechanical Engineering Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2023年第3期58-62,共5页Journal of Dalian Jiaotong University

摘　　要：提出了一种新型超音速喷涂喷管以促进涂料雾化,以原子灰作为喷涂材料进行数值模拟,详细讨论了喷涂喷管内外流场和雾化颗粒分布情况。基于响应曲面法和遗传算法分析了该喷管中进液口直径d_4、进液口位置l、进液口与轴线夹角α对平均粒子直径的影响,得到了一个响应变量关于3个因素的回归预测模型,优化出喷管的最佳结构参数。结果表明:当d_(4)=0.05 mm、l=2.5 mm、α=30°时,喷管雾化效果最好,平均粒子直径为3.714 5×10^(-6) mm,优化结果与雾化计算仿真结果误差小于0.05%,说明了优化结果的可靠性。A new type of supersonic spray nozzle is proposed to improve atomization,and the atomic ash is used as the liquid material for numerical simulation with Fluent software.The internal and external flow fields and atomization particle distribution of the spraying nozzle are discussed in detail.Based on the response sur-face method and genetic algorithm,the influence of the diameter of the liquid inlet d4,the position of the liq-uid inlet l,and the angleαbetween the liquid inlet and the axis on the average particle diameter is analyzed.A regression prediction model of response variables about three independent variables is obtained,and the opti-mal structural parameters of the nozzle are optimized.The results show that,when d_(4)=0.05 mm,1=2.5 mm,andα=30°,the atomization effect of the nozzle is the best,the average particle diameter is 3.7145x10^(-6)mm,and the error with the simulation result is less than 0.05%,which shows that the optimized structural parame-ters feasibility.

关 键 词：超音速喷管 原子灰 响应曲面 遗传算法 平均粒子直径 

分 类 号：TQ639.3[化学工程—精细化工] U270.6[机械工程—车辆工程]