Energy Performance and Radial Force of Vertical Axis Darrieus Turbine for Ocean Energy

Runqiang Zhang, Zhenwei Huang, Lei Tan, Yuchuan Wang and Erqi Wang
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Runqiang Zhang: State Key Laboratory of Hydroscience and Engineering, Beijing Key Laboratory of CO 2 Utilization and Reduction Technology, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Zhenwei Huang: State Key Laboratory of Hydroscience and Engineering, Beijing Key Laboratory of CO 2 Utilization and Reduction Technology, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Lei Tan: State Key Laboratory of Hydroscience and Engineering, Beijing Key Laboratory of CO 2 Utilization and Reduction Technology, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Yuchuan Wang: College of Water Resources and Architectural Engineering, Northwest A & F University, Xianyang 712100, China
Erqi Wang: State Key Laboratory of Hydroscience and Engineering, Beijing Key Laboratory of CO 2 Utilization and Reduction Technology, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2020, vol. 13, issue 20, 1-15

Abstract: Vertical axis Darrieus turbine is the key component for ocean energy conversion and utilization. In the present work, the energy performance, flow pattern, and radial force for a vertical axis Darrieus turbine were investigated. The experimental measurements and numerical simulations were in good agreement, which validates the accuracy and reliability of the numerical method. The results showed that the power coefficient gradually increased with the increase of tip speed ratio λ, and the power coefficient had three peaks in a revolution of runner due to three blades. The complex vortex induced by the turbine revolution mainly includes the blade tip vortex and blade surface vortex, which are related to the turbine rotation and flow separation on blade surface. The vorticity transport equation was first introduced to analyze the mechanism and evolution of vortex in a vertical axis Darrieus turbine, and the results revealed that the relative vortex elongation term is the main driving force for the formation and development of the blade surface vortex. The radial force of the Darrieus turbine gradually increases with the increase in tip speed ratio, and it is symmetrical with three humps due to three blades.

Keywords: Darrieus; vertical axis turbine; energy performance; vortex; radial force (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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