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

›› 2011, Vol. 19 ›› Issue (3): 529-532.

• RESEARCH NOTES • Previous Articles

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

WANG Hongyi, DONG Feng, BIAN Yuchen, TAN Chao

Tianjin Key Laboratory of Process Measurement and Control, School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China

Received:2010-11-09 Revised:2011-01-19 Online:2011-06-28 Published:2011-06-28
Supported by:
Supported by the National Natural Science Foundation of China(50776063);the Natural Science Foundation of Tianjin(11JCZDJC22500)

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

王红一, 董峰, 卞聿晨, 谭超

Tianjin Key Laboratory of Process Measurement and Control, School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China

通讯作者: DONG Feng, E-mail: fdong@tju.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(50776063);the Natural Science Foundation of Tianjin(11JCZDJC22500)

Abstract

Abstract: 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 mm³·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.

Key words: high-speed image, bubble formed volume, gas volume flow rate, gas orifice diameter

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 mm³·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

WANG Hongyi, DONG Feng, BIAN Yuchen, TAN Chao. Improved Correlation for the Volume of Bubble Formed in Air-Water System[J]. , 2011, 19(3): 529-532.

王红一, 董峰, 卞聿晨, 谭超. Improved Correlation for the Volume of Bubble Formed in Air-Water System[J]. , 2011, 19(3): 529-532.

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

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

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