超音速气雾化喷嘴的水流模拟实验研究  

Study on Water Flow Simulation Experimental with Supersonic Gas Atomizing Nozzle

作　　者：祁航 周香林[1] 徐良辉 胡云飞 温薇[2] 李景昊 杜开平 马尧 于月光 Hang Qi;Xianglin Zhou;Lianghui Xu;Yunfei Hu;Wei Wen;Li Jinghao;Du Kaiping;Ma Yao;Yu Yueguang(State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083;Department of Mechanical Engineering,Mcgill University,Montreal,QCH2A0C3;BGRIMM Technology Group,Beijng 100160)

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083 [2]北京科技大学机械工程学院,北京100083 [3]加拿大麦吉尔大学机械工程系,蒙特利尔QCH2A0C3 [4]矿冶科技集团有限公司,北京100160

出　　处：《热喷涂技术》2020年第3期54-59,75,共7页Thermal Spray Technology

基　　金：国家重点研发计划(2017YFB0306100);国家自然科学基金项目(51271034)。

摘　　要：本文设计了一种超音速气雾化喷嘴,采用水代替金属熔体进行雾化模拟实验,使用高速摄影机拍摄所获得的雾化流场并进行分析。结果表明,水的雾化破碎过程遵循二次破碎理论,水流先产生扰动,发展为波状并破碎成条带,最后发生二次破碎形成细小的液滴。在流场的形状、结构上,水的雾化与使用Fluent软件模拟的结果一致,不同参数下的实验结果也与计算机模拟的结果相似,验证了计算机模拟结果的可靠性,计算机模拟的结果在一定程度上可以作为工业设计的参考。In this paper,a supersonic gas atomizing nozzle is designed.Water is used instead of a metal melt to perform an atomization simulation experiment.A high-speed camera is used to capture the atomized flow field and analyze the images.The results show that the atomization and crushing process of water follows the secondary crushing theory.The water flow first generates disturbances,develops into waves and breaks into ligaments,and finally forms tiny droplets when secondary crushing occurs.In the shape and structure of the flow field,the atomization of water is consistent with the simulation results using Fluent;the experimental results under different parameters are similar to the results of computer simulation.The reliability of the computer simulation results is verified.To some extent,the computer simulation results can be used as a reference for industrial design.

关 键 词：超音速气雾化 FLUENT 高速摄影 

分 类 号：TG174.4[金属学及工艺—金属表面处理]