Investigating the flow characteristics of air-lift pumps operating in gas-liquid two-phase flow

doi:10.1016/j.cjche.2017.09.011

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (2): 219-227.DOI: 10.1016/j.cjche.2017.09.011

• Fluid Dynamics and Transport Phenomena • 下一篇

Investigating the flow characteristics of air-lift pumps operating in gas-liquid two-phase flow

Zhineng Wang^1,2,3, Yong Kang^1,2,3, Xiaochuan Wang^1,2,3, Deng Li^1,2,3, Dong Hu^1,2,3

1 Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China;
2 Hubei Key Laboratory of Waterjet Theory and New Technology, Wuhan University, Wuhan 430072, China;
3 School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China

收稿日期:2017-06-08 修回日期:2017-09-16 出版日期:2018-02-28 发布日期:2018-03-16
通讯作者: Xiaochuan Wang
基金资助:
Supported by the National Key Basic Research Development Program of China (2014CB239200) and the National Natural Science Foundation of China (51474158).

Investigating the flow characteristics of air-lift pumps operating in gas-liquid two-phase flow

Zhineng Wang^1,2,3, Yong Kang^1,2,3, Xiaochuan Wang^1,2,3, Deng Li^1,2,3, Dong Hu^1,2,3

1 Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China;
2 Hubei Key Laboratory of Waterjet Theory and New Technology, Wuhan University, Wuhan 430072, China;
3 School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China

Received:2017-06-08 Revised:2017-09-16 Online:2018-02-28 Published:2018-03-16
Contact: Xiaochuan Wang
Supported by:
Supported by the National Key Basic Research Development Program of China (2014CB239200) and the National Natural Science Foundation of China (51474158).

摘要/Abstract

摘要： Experiments were conducted to investigate the flow characteristics in the riser pipe and the suction pipe of airlift pump at a series of air flow rates and submergence ratios by using a high speed camcorder and a Laser Doppler Velocimetry system (LDV). A modified model was developed to predict the performance of airlift pump operating in gas-liquid two-phase flow. The results show that an unstable flow structure composed by a water falling film, a bubbly mixture, a water ascending film appearing alternately in riser pipe dominates the performance of airlift pump at large air flow rates. The bubbly mixture with a strongest capacity for pumping water first increases to its maximum and then slightly decreases. In suction pipe, the average velocity shows a flat profile and increases with increasing submergence ratio. Moreover, the predicted results of modified model are in good agreement with the experimental data in a margin of ±12%.

关键词: Pump, Gas-liquid flow, Mixtures, Flow structure, Riser pipe

Abstract: Experiments were conducted to investigate the flow characteristics in the riser pipe and the suction pipe of airlift pump at a series of air flow rates and submergence ratios by using a high speed camcorder and a Laser Doppler Velocimetry system (LDV). A modified model was developed to predict the performance of airlift pump operating in gas-liquid two-phase flow. The results show that an unstable flow structure composed by a water falling film, a bubbly mixture, a water ascending film appearing alternately in riser pipe dominates the performance of airlift pump at large air flow rates. The bubbly mixture with a strongest capacity for pumping water first increases to its maximum and then slightly decreases. In suction pipe, the average velocity shows a flat profile and increases with increasing submergence ratio. Moreover, the predicted results of modified model are in good agreement with the experimental data in a margin of ±12%.

Key words: Pump, Gas-liquid flow, Mixtures, Flow structure, Riser pipe

Zhineng Wang, Yong Kang, Xiaochuan Wang, Deng Li, Dong Hu. Investigating the flow characteristics of air-lift pumps operating in gas-liquid two-phase flow[J]. Chinese Journal of Chemical Engineering, 2018, 26(2): 219-227.

Zhineng Wang, Yong Kang, Xiaochuan Wang, Deng Li, Dong Hu. Investigating the flow characteristics of air-lift pumps operating in gas-liquid two-phase flow[J]. Chin.J.Chem.Eng., 2018, 26(2): 219-227.

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Investigating the flow characteristics of air-lift pumps operating in gas-liquid two-phase flow

Investigating the flow characteristics of air-lift pumps operating in gas-liquid two-phase flow

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