Investigation of Bubble Transportation in Venturi-type Bubble Generator

MO Zheng-yu; DU Min; SHAO Zi-yi; XIE Guo; LIU Hong-tao; SUN Li-cheng

doi:10.7538/yzk.2016.50.06.1034

Atomic Energy Science and Technology > 2016 > 50(6): 1034-1039. > DOI: 10.7538/yzk.2016.50.06.1034

MO Zheng-yu, DU Min, SHAO Zi-yi, XIE Guo, LIU Hong-tao, SUN Li-cheng. Investigation of Bubble Transportation in Venturi-type Bubble Generator[J]. Atomic Energy Science and Technology, 2016, 50(6): 1034-1039. DOI: 10.7538/yzk.2016.50.06.1034

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Investigation of Bubble Transportation in Venturi-type Bubble Generator

State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China

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Abstract

The visualized study was carried out involving the transportation and breakup process in a Venturi-type bubble generator. The air and water were used as working fluids with volumetric flow rates of 15-20 m³/h and 0.6-0.7 L/min, respectively in experiment, resulting in a void fraction in the range of 0.2%-0.3%. The results show that being different from that of a conventional channel, bubbles are decelerated rapidly after flowing out of the throat for Venturi tube, leading to a larger difference of velocities between the gas and liquid. This must have a significant effect on the deformation and breakup of bubbles. The water flow rate has little effect on the position of bubble breakup which is always at a distance from the throat about 8-10 mm and near the boundary between the vortex region and main stream.
- Venturi-type bubble generator,
- bubble breakup,
- void fraction,
- drift flux model,
- equivalent diameter

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