Numerical investigation on the performance of Wells turbine with non-uniform tip clearance for wave energy conversion

Zahari Taha; Sugiyono; T. M.Y.S. Tuan Ya; Tatsuo Sawada

doi:10.1016/j.apor.2011.07.002

Numerical investigation on the performance of Wells turbine with non-uniform tip clearance for wave energy conversion

Zahari Taha, Sugiyono, T. M.Y.S. Tuan Ya, Tatsuo Sawada

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

The performance of a Wells turbine with various non-uniform tip clearances was investigated using computational fluid dynamics (CFD). The investigation was performed on numerical models of a NACA0020 blade profile under steady flow conditions. The performance of turbines with uniform and non-uniform tip clearances was compared. The results were also compared with experimental results in literature. It was shown that the performance of turbine with non-uniform tip clearance is similar with that of turbine with uniform one in terms of torque coefficient, input power coefficient, and efficiency. However, the turbine with non-uniform tip clearance seems to have a preferable overall performance. An investigation on the flow-field around the turbine blade was performed in order to explain the phenomena.

Original language	English
Pages (from-to)	321-331
Number of pages	11
Journal	Applied Ocean Research
Volume	33
Issue number	4
DOIs	https://doi.org/10.1016/j.apor.2011.07.002
Publication status	Published - 2011 Oct

Keywords

CFD
NACA0020 blade profile
Tip clearance
Wells turbine

ASJC Scopus subject areas

Ocean Engineering

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10.1016/j.apor.2011.07.002

Cite this

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title = "Numerical investigation on the performance of Wells turbine with non-uniform tip clearance for wave energy conversion",

abstract = "The performance of a Wells turbine with various non-uniform tip clearances was investigated using computational fluid dynamics (CFD). The investigation was performed on numerical models of a NACA0020 blade profile under steady flow conditions. The performance of turbines with uniform and non-uniform tip clearances was compared. The results were also compared with experimental results in literature. It was shown that the performance of turbine with non-uniform tip clearance is similar with that of turbine with uniform one in terms of torque coefficient, input power coefficient, and efficiency. However, the turbine with non-uniform tip clearance seems to have a preferable overall performance. An investigation on the flow-field around the turbine blade was performed in order to explain the phenomena.",

keywords = "CFD, NACA0020 blade profile, Tip clearance, Wells turbine",

author = "Zahari Taha and Sugiyono and {Tuan Ya}, {T. M.Y.S.} and Tatsuo Sawada",

note = "Funding Information: The authors would like to thank AUN/SEED-Net (JICA) for the providing financial support. The authors would also like to thank the Department of Engineering Design and Manufacture at University of Malaya, the Department of Mechanical and Industrial Engineering at Gadjah Mada University, and the Department of Mechanical Engineering at Keio University.",

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AU - Taha, Zahari

AU - Sugiyono,

AU - Tuan Ya, T. M.Y.S.

AU - Sawada, Tatsuo

N1 - Funding Information: The authors would like to thank AUN/SEED-Net (JICA) for the providing financial support. The authors would also like to thank the Department of Engineering Design and Manufacture at University of Malaya, the Department of Mechanical and Industrial Engineering at Gadjah Mada University, and the Department of Mechanical Engineering at Keio University.

PY - 2011/10

Y1 - 2011/10

N2 - The performance of a Wells turbine with various non-uniform tip clearances was investigated using computational fluid dynamics (CFD). The investigation was performed on numerical models of a NACA0020 blade profile under steady flow conditions. The performance of turbines with uniform and non-uniform tip clearances was compared. The results were also compared with experimental results in literature. It was shown that the performance of turbine with non-uniform tip clearance is similar with that of turbine with uniform one in terms of torque coefficient, input power coefficient, and efficiency. However, the turbine with non-uniform tip clearance seems to have a preferable overall performance. An investigation on the flow-field around the turbine blade was performed in order to explain the phenomena.

AB - The performance of a Wells turbine with various non-uniform tip clearances was investigated using computational fluid dynamics (CFD). The investigation was performed on numerical models of a NACA0020 blade profile under steady flow conditions. The performance of turbines with uniform and non-uniform tip clearances was compared. The results were also compared with experimental results in literature. It was shown that the performance of turbine with non-uniform tip clearance is similar with that of turbine with uniform one in terms of torque coefficient, input power coefficient, and efficiency. However, the turbine with non-uniform tip clearance seems to have a preferable overall performance. An investigation on the flow-field around the turbine blade was performed in order to explain the phenomena.

KW - CFD

KW - NACA0020 blade profile

KW - Tip clearance

KW - Wells turbine

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JF - Applied Ocean Research

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Numerical investigation on the performance of Wells turbine with non-uniform tip clearance for wave energy conversion

Abstract

Keywords

ASJC Scopus subject areas

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