摘要
基于空化膜清洗实验系统,本文采用高速相机对弹性膜附近的空化泡溃灭过程开展了可视化研究,阐明了空化泡与弹性膜间的无量纲数L*(在0.44到0.94范围内变化)与弹性膜厚度对空化泡动力学及膜清洗机制的影响规律。通过对比不同参数下空化泡的泡壁演变规律与弹性膜的形变情况,本文获得如下三点发现:(1)在一定范围内,无量纲数L*可显著影响空化泡的溃灭过程及其引起的弹性膜形变;(2)当无量纲数L*较小时,膜表面可能因空化射流而受损,其破损程度与膜厚度有关;(3)当污染物颗粒较小时,空化泡的动力学行为几乎不受弹性膜表面污染物的影响。
Based on the experimental system of membrane cleaning using cavitation bubble, in this paper, a high-speed camera is adopted to carry out a visualization study on the collapsing process of cavitation bubbles near the elastic membrane. The effects of dimensionless number L* between the cavitation bubble and the elastic membrane(varying between 0.44 and 0.94)and the thickness of elastic membrane on the cavitation bubble dynamics and membrane cleaning mechanism are revealed. Through investigations of the positions of the bubble wall and the deformation of the elastic membrane under different conditions, the following three findings are obtained in this paper.(1) Within certain ranges, the dimensionless number L* could significantly affect the collapsing process of the cavitation bubble and the associated membrane deformation.(2) For conditions with small L*, the elastic membrane could be possibly damaged by the bubble collapse, depending on the thickness of the membrane.(3) For pollutant with small particles, the dynamic behavior of cavitation bubble is hardly affected by the surface pollutants of the elastic membrane.
作者
张宇宁
张潇飞
裘勖
ZHANG Yuning;ZHANG Xiaofei;QIU Xu(Key Laboratory of Power Station Energy Transfer Conversion and System(Ministry of Education),North China Electric Power University,Beijing 102206,China;School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;China Atomic Energy Publishing&Media Co.LTD,Beijing 100048,China)
出处
《核科学与工程》
CAS
CSCD
北大核心
2022年第4期871-880,共10页
Nuclear Science and Engineering
基金
国家自然科学基金(51976056
U1965106)资助项目。
关键词
空化泡
膜清洗
弹性膜
高速摄影
Cavitation bubble
Membrane cleaning
Elastic membrane
High-speed photography
