首页 | 本学科首页   官方微博 | 高级检索  
     检索      

同轴气流式液体射流分裂液滴粒径研究
引用本文:郭立梅,吕明,宁智.同轴气流式液体射流分裂液滴粒径研究[J].力学学报,2022,54(2):405-413.
作者姓名:郭立梅  吕明  宁智
作者单位:北京交通大学机械与电子控制工程学院, 北京100044
基金项目:中央高校基本科研业务费专项资金资助项目(2020JBM053);
摘    要:针对同轴气流式液体射流分裂液滴粒径预测模型缺乏的现状,结合射流线性稳定性理论,建立了基于临界模数的同轴气流式黏性液体射流分裂液滴粒径表达式,在此基础上,分别研究了气流旋拧(气流同时存在轴向和周向运动)及流体物性(气体可压缩性、液体黏性、气液密度比和表面张力)对液滴粒径的影响规律.研究发现:周围气流轴向引射作用和同轴旋转...

关 键 词:液体射流  同轴气流  液滴粒径  临界模数
收稿时间:2021-08-04

STUDY ON THE DROPLET SIZE OF LIQUID JET IN A COAXIAL AIRFLOW
Institution:College of Mechanical and Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Abstract:In view of the lack of prediction model of droplet size of the liquid jet in a coaxial airflow, combined with the linear stability theory of the liquid jet, the mathematical expression of droplet size of the liquid jet in a coaxial airflow based on the critical modulus is established in this paper. On this basis, the effects of surrounding gas twisting (the surrounding airflow has both axial and circumferential motion) and fluid physical parameters (gas compressibility, liquid viscosity, gas liquid density ratio, and surface tension) on droplet size of liquid let are studied respectively. The research results show that: (1) both the axial ejection and coaxial rotation of the surrounding airflow will lead to the droplet size increasing first and then decreasing. When there is only rotation motion of the surrounding airflow, the surrounding airflow rotation has little effect on the droplet size of liquid jet under the same critical modulus. (2) Within the range of parameters studied in this paper, the droplet size of liquid jet decreases with the increasing of the surrounding gas compressibility and the gas liquid density ratio, and the droplet size of liquid jet increases with the increasing of the liquid viscosity and surface tension. The effect of gas compressibility on droplet size of liquid jet is stronger when the surrounding airflow rotates coaxially, while the effect of liquid viscosity on droplet size of liquid jet is more significant when the surrounding airflow ejects coaxially. The research results have certain theoretical significance and engineering application value for the droplet size prediction of liquid jet in a coaxial airflow. 
Keywords:
点击此处可从《力学学报》浏览原始摘要信息
点击此处可从《力学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号