Pressure flow generally exists in water conservancy projects and pipelines. The flow boundary of the contraction section faces a potential risk of cavitation erosion under high velocity. However, there is a lack of effective methods to suppress cavitation in engineering practices with pressure flow, posing a challenge to the operational safety of discharge structures and pipeline devices. The purpose of this paper was to realize the application of air entrainment in a plug-type contraction section of pressure flow. It was found that a single air vent and a low air flow rate could achieve complete vena contracta aeration. The pressure profiles of the vena contracta were investigated, and the results showed that the pressure distribution allowed the entrained air to diffuse laterally and convectively. Finally, we proposed a fitting algorithm to predict the air concentration in the vena contracta. These conclusions are of great significance for improving the safety and cavitation resistance of the contraction section of pressure flow.
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September 2019
Research-Article
A Study on Aeration to Alleviate Cavitation Erosion in the Contraction Section of Pressure Flow
Rui Li,
Rui Li
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: li.rui.sai@gmail.com
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: li.rui.sai@gmail.com
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Wei-Lin Xu,
Wei-Lin Xu
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: xuwl@scu.edu.cn
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: xuwl@scu.edu.cn
1Corresponding author.
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Jing Luo,
Jing Luo
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: luojing@scu.edu.cn
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: luojing@scu.edu.cn
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Hao Yuan,
Hao Yuan
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: 18996152721@163.com
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: 18996152721@163.com
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Wei-Yang Zhao
Wei-Yang Zhao
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: wyzhao_sl@163.com
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: wyzhao_sl@163.com
Search for other works by this author on:
Rui Li
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: li.rui.sai@gmail.com
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: li.rui.sai@gmail.com
Wei-Lin Xu
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: xuwl@scu.edu.cn
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: xuwl@scu.edu.cn
Jing Luo
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: luojing@scu.edu.cn
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: luojing@scu.edu.cn
Hao Yuan
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: 18996152721@163.com
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: 18996152721@163.com
Wei-Yang Zhao
State Key Laboratory of Hydraulics and
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: wyzhao_sl@163.com
Mountain River Engineering,
Sichuan University,
Chengdu 610065, China
e-mail: wyzhao_sl@163.com
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received July 9, 2018; final manuscript received January 24, 2019; published online April 9, 2019. Assoc. Editor: Matevz Dular.
J. Fluids Eng. Sep 2019, 141(9): 091108 (10 pages)
Published Online: April 9, 2019
Article history
Received:
July 9, 2018
Revised:
January 24, 2019
Citation
Li, R., Xu, W., Luo, J., Yuan, H., and Zhao, W. (April 9, 2019). "A Study on Aeration to Alleviate Cavitation Erosion in the Contraction Section of Pressure Flow." ASME. J. Fluids Eng. September 2019; 141(9): 091108. https://doi.org/10.1115/1.4043230
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