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

30 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 1

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

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Taha, Z., Sugiyono, Tuan Ya, T. M. Y. S., & Sawada, T. (2011). Numerical investigation on the performance of Wells turbine with non-uniform tip clearance for wave energy conversion. Applied Ocean Research, 33(4), 321-331. https://doi.org/10.1016/j.apor.2011.07.002

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