耦合超声场的气液流动特性  

Characterization of gas-liquid flow with coupled ultrasonic field

作　　者：李强[1] 张钧[2] 卢少波 高晓[1] 李子腾 王振波[1] LI Qiang;ZHANG Jun;LU Shaobo;GAO Xiao;LI Ziteng;WANG Zhenbo(College of New Energy,China University of Petroleum(East China),Qingdao 266580,China;College of Energy Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580 [2]浙江大学能源工程学院,浙江杭州310027

出　　处：《高校化学工程学报》2024年第1期70-78,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(52176050);山东省自然科学基金(ZR2020ME174)。

摘　　要：功率超声作为一种新兴的绿色技术,越来越受到石油行业的重视。结合稠油超声降黏机制,从气泡瞬态演化规律和溃灭特性出发,对超声作用下空化气泡和空化流场进行数值模拟和实验验证。模拟结果表明,增加超声频率和减小气泡之间的距离会导致单个空化气泡最大半径的减小,气泡个数的增加会使气泡生长至破裂过程的速度减小,延长超声作用时间和增大超声频率可增加超声场中最大空化压力。实验表明,空化气泡不断在超声场中振荡并互相聚并,且随着超声作用时间的延长,该过程更加剧烈。研究内容为稠油超声降黏在石油化工行业的应用提供了重要的理论指导。Power ultrasound as an emerging green technology is receiving increasing attention from oil industry.Due to large pressure difference within fluids,ultrasonic cavitation occurs and physical and chemical effects of cavitation bubble nucleation,growth,convection and collapse as well as periodic oscillation and instantaneous rupture can play important roles.In this study,simulation results indicate that increasing ultrasonic frequency and reducing the distance between bubbles lead to a reduction in the maximum radius of individual cavitation bubbles.The augmentation of the number of bubbles diminishes the speed of bubble growth to rupture,while prolonging ultrasonic exposure time and elevating ultrasonic frequency enhance the maximum cavitation pressure in the ultrasonic field.Experimental findings demonstrate a continuous oscillation and aggregation of cavitation bubbles in the ultrasonic field,which intensifies with prolonged ultrasonic exposure.This study provides important theoretical guidance for the application of ultrasound in industrial petroleum production.

关 键 词：超声波 气泡动力学 数值模拟 高速摄影技术 

分 类 号：TB559[理学—物理]