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International Journal of Rotating Machinery
Volume 2008, Article ID 536079, 12 pages
Research Article

Quasi-Steady Analytical Model Benchmark of an Impulse Turbine for Wave Energy Extraction

Department of Mechanical & Aeronautical Engineering, Materials and Surface Science Institute, University of Limerick, Limerick, Ireland

Received 15 April 2008; Accepted 11 September 2008

Academic Editor: Ion Paraschivoiu

Copyright © 2008 A. Thakker et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This work presents a mean line analysis for the prediction of the performance and aerodynamic loss of axial flow impulse turbine wave energy extraction, which can be easily incorporated into the turbine design program. The model is based on the momentum principle and the well-known Euler turbine equation. Predictions of torque, pressure drop, and turbine efficiency showed favorable agreement with experimental results. The variation of the flow incidence and exit angles with the flow coefficient has been reported for the first time in the field of wave energy extraction. Furthermore, an optimum range of upstream guide vanes setting up angle was determined, which optimized the impulse turbine performance prediction under movable guide vanes working condition.