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Research Papers: Multiphase Flows

Cavitation Performance of Hydraulic Turbines in the Three Gorges Reservoir With Consideration of Influence of Total Phosphorus Pollution

[+] Author and Article Information
Wenshan Jiang

College of Water Resources and
Civil Engineering,
China Agricultural University,
Beijing 100083, China;
Beijing Aerospace Propulsion Institute,
Beijing 100076, China
e-mail: wenzhe0268@163.com

Jinshi Chang

College of Water Resources and
Civil Engineering,
China Agricultural University,
Beijing 100083, China
e-mail: cjs@cau.edu.cn

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received March 18, 2015; final manuscript received February 15, 2016; published online April 22, 2016. Assoc. Editor: Olivier Coutier-Delgosha.

J. Fluids Eng 138(8), 081301 (Apr 22, 2016) (6 pages) Paper No: FE-15-1186; doi: 10.1115/1.4032933 History: Received March 18, 2015; Revised February 15, 2016

The Three Gorges Reservoir has the largest installed power station in the world and generates the most energy in the world as well; the hydraulic turbines employed are the largest Francis turbines. In recent years, total phosphorus (TP) pollution in the reservoir has increased along with eutrophication. TP is the total amount of various phosphides mostly phosphate metal represented by phosphorus element. In this paper, the cavitation pressure characteristics of polluted water were determined through experiments, and the impact on the suction head of turbines during actual operation was studied. Based on the pollution situation, the cavitation performance and the possibility of severe cavitation erosion of turbines in the Three Gorges Reservoir were evaluated. Studies proved that with the increase in the TP concentration, the cavitation inception pressure and critical cavitation pressure increased. This may led to a decrease in the cavitation performance of turbines, which run with polluted water as the working medium. These research results have great importance on cavitation theory and engineering practice.

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References

Figures

Grahic Jump Location
Fig. 1

Device for measuring cavitation pressure

Grahic Jump Location
Fig. 2

Incipient cavitation pressure of samples

Grahic Jump Location
Fig. 3

Critical cavitation pressure of samples

Grahic Jump Location
Fig. 4

Cavitation pressure characteristics of water in the Three Gorges Reservoir

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