Performance enhancement of Wells turbine: Combined radiused edge blade tip, static extended trailing edge, and variable thickness modifications

• P. Madhan, Kumar

• Paresh, Halder

• Afzal, Husain

• Abdus, Samad

抄録

The Wells turbine is used in conjunction with an oscillating water column to harvest wave energy. It is a self-rectifying axial flow reaction turbine which consists of symmetrical blades aligned normal to the incoming flow. A narrow operating range due to flow separation restricts the power extracting capability of the turbine at a higher flow rate. To improve its performance, a turbine blade with combined design modifications such as radiused edge blade (RED) tip, static extended trailing edge (SETE) and variable thickness blade (VTB) was investigated through CFD analysis. Three-dimensional time independent Reynolds-averaged Navier-Stokes equations were solved in a commercial solver to obtain the turbine performance, which was given by non-dimensional torque, pressure drop and efficiency. The combined REB tip, SETE and VTB modifications enhanced relative average turbine power output by 97% and the relative operating range by 22%. However, the average efficiency is decreased by 7.7%, because of the increased pressure drop.

source:https://creativecommons.org/licenses/by-nc-nd/4.0/

source:https://doi.org/10.1016/j.oceaneng.2019.05.041

収録刊行物

• Ocean Engineering

  Ocean Engineering 185 47-58, 2019-05-31

  Elsevier

詳細情報

• CRID: 1050003824938187136
• NII論文ID: 120006843465
• ISSN: 00298018
• Web Site: http://id.nii.ac.jp/1394/00001338/
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
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  • CiNii Articles