Improved Correlation for the Volume of Bubble Formed in Air-Water System  

气水流动中气泡生成体积计算模型的改进(英文)

作　　者：王红一 董峰 卞聿晨 谭超 

机构地区：[1]Tianjin Key Laboratory of Process Measurement and Control,School of Electrical Engineering and Automation,Tianjin University

出　　处：《Chinese Journal of Chemical Engineering》2011年第3期529-532,共4页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(50776063);the Natural Science Foundation of Tianjin(11JCZDJC22500)

摘　　要：In order to address the bubble formation and movement in air-water two-phase flow,single bubble rising in stagnant water is experimentally studied by digital image processing.Bubbles are released individually from the submerged orifices with different diameters(1.81 mm,2.07 mm,2.98 mm,3.92 mm)at different detachment frequency.Images are recorded by a high-speed video camera and processed by digital image processing technique. The factors impacting the formed volume of bubble are discussed.The experimental results showed that a threshold of gas flow rate(400 mm 3 ·s- 1)divides the bubble formation into two regimes:the constant volume regime and the growing volume regime.Especially for the growing volume regime,the surface tension is taken into account.The bubble volume is consisted of two parts:the surface tension impacting part and the gas volume flow rate impacting part.An improved correlation for bubble volume prediction is developed for the two regimes and better coincidence with the experiment data than the previous models is obtained.In order to address the bubble formation and movement in air-water two-phase flow,single bubble rising in stagnant water is experimentally studied by digital image processing.Bubbles are released individually from the submerged orifices with different diameters（1.81 mm,2.07 mm,2.98 mm,3.92 mm）at different detachment frequency.Images are recorded by a high-speed video camera and processed by digital image processing technique. The factors impacting the formed volume of bubble are discussed.The experimental results showed that a threshold of gas flow rate（400 mm 3 ·s- 1）divides the bubble formation into two regimes：the constant volume regime and the growing volume regime.Especially for the growing volume regime,the surface tension is taken into account.The bubble volume is consisted of two parts：the surface tension impacting part and the gas volume flow rate impacting part.An improved correlation for bubble volume prediction is developed for the two regimes and better coincidence with the experiment data than the previous models is obtained.

关 键 词：high-speed image bubble formed volume gas volume flow rate gas orifice diameter 

分 类 号：TQ021.1[化学工程]