基于响应面法的空气雾化喷嘴内流道结构优化  

Optimization of Flow Channel Structure in Air Atomization Nozzle Based on Response Surface Method

作　　者：方子怡 钱丽娟[1] 朱晨琳 乔文通 Fang Ziyi;Qian Lijuan;Zhu Chenlin;Qiao Wentong(Key Laboratory of Intelligent Manufacturing Quality Big Data Tracing and Application of Zhejiang Province,China Jiliang University,Hangzhou 310018,China;School of Astronautics,Beihang University,Beijing 100191,China)

机构地区：[1]中国计量大学智能制造质量大数据溯源与应用实验室,浙江310018 [2]北京航空航天大学宇航学院,北京100191

出　　处：《水动力学研究与进展（A辑）》2024年第5期788-800,共13页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(12372252,12002334)。

摘　　要：为了提高空气雾化喷嘴的雾化性能,该文针对外混式空气雾化喷嘴的内流道结构,采用数值模拟、响应面法和实验相结合的方式,以气相通道外收缩角α、内收缩角β和气相外侧长度L作为优化变量,以喷嘴的出口速度U为目标响应,开展喷嘴内流道结构的优化设计。通过热线风速仪、粒度分析仪及激光多普勒测速仪对喷雾场的粒径与速度进行实验测量,以验证数值模拟和响应面法优化后结果的准确性。研究结果表明:响应面法优化后的喷嘴气体出口速度较原来增加了17.44m/s,能量损耗降低了39.51%;喷雾液柱周围气体分布更加均匀,有助于增加气液相对动能。优化后的喷嘴实验测量发现液滴颗粒速度增大,粒径尺寸减小,分布峰值升高且分布范围更加集中,验证了数值模拟、响应面法与实验结合的有效可行性。In order to improve the atomization performance of air atomizing nozzles,the combination of numerical simulation,response surface method and experiment is adopted in this study for the internal flow path structure of external mixing air atomizing nozzles.By taking the external contraction Angle a,internal contraction Angle β and the outer length L of the gas phase as optimization variables,and taking the exit velocity U of the nozzle as the target response,the optimal design of the internal flow path structure of the nozzle is carried out.The particle size and velocity of the spray field are measured experimentally by hot-wire anemometer,particle size analyzer and laser Doppler velometer to verify the accuracy of the numerical simulation and response surface method optimization results.The results show that the optimized response surface method increases the nozzle gas outlet velocity by 17.44 m/s and reduces the energy loss by 39.51%.The gas distribution around the spray liquid column is more uniform,which helps to increase the gas-liquid relative kinetic energy.After the optimized nozzle experiment measurement,it is found that the droplet particle velocity increases,the particle size decreases,the distribution peak value increases and the distribution range becomes more concentrated,thus verifying the effective feasibility of the combination of numerical simulation,response surface method and experiment.

关 键 词：空气雾化喷嘴 响应面法 内流道优化 数值仿真 喷雾场 

分 类 号：TH138[机械工程—机械制造及自动化]