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

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...

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Bibliographic Details
Main Authors: Zahari, Taha, Sugiyono, ., T. M. Y. S., Tuan Ya, Sawada, Tatsuo
Format: Article
Language:English
Published: Elsevier 2011
Subjects:
Online Access:http://umpir.ump.edu.my/id/eprint/25930/
http://umpir.ump.edu.my/id/eprint/25930/
http://umpir.ump.edu.my/id/eprint/25930/
http://umpir.ump.edu.my/id/eprint/25930/1/Numerical%20investigation%20on%20the%20performance%20of%20Wells%20turbine%20with%20non-uniform%20tip%20clearance%20.pdf
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Summary: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.