The effect of rectangular gurney flap on wells turbine performance
Kotb, A., Nawar, M., Abd El Maksoud, R. (2020). The effect of rectangular gurney flap on wells turbine performance. EKB Journal Management System, 19(19th International Conference on Applied Mechanics and Mechanical Engineering.), 1-15. doi: 10.1088/1757-899X/973/1/012006
A T Kotb; M A Nawar; R M Abd El Maksoud. "The effect of rectangular gurney flap on wells turbine performance". EKB Journal Management System, 19, 19th International Conference on Applied Mechanics and Mechanical Engineering., 2020, 1-15. doi: 10.1088/1757-899X/973/1/012006
Kotb, A., Nawar, M., Abd El Maksoud, R. (2020). 'The effect of rectangular gurney flap on wells turbine performance', EKB Journal Management System, 19(19th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 1-15. doi: 10.1088/1757-899X/973/1/012006
Kotb, A., Nawar, M., Abd El Maksoud, R. The effect of rectangular gurney flap on wells turbine performance. EKB Journal Management System, 2020; 19(19th International Conference on Applied Mechanics and Mechanical Engineering.): 1-15. doi: 10.1088/1757-899X/973/1/012006

The effect of rectangular gurney flap on wells turbine performance

The International Conference on Applied Mechanics and Mechanical Engineering
Volume 19, 19th International Conference on Applied Mechanics and Mechanical Engineering., July 2020, Page 1-15  XML PDF (1.92 MB)
Document Type: Original Article
DOI: 10.1088/1757-899X/973/1/012006
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Authors
A T Kotb1; M A Nawar2; R M Abd El Maksoud3
1Demonstrator, Mechanical Power Engineering Department, Faculty of Engineering, Mattaria, Helwan University, Egypt.
2Assist.Prof., Mechanical Power Engineering Department, Faculty of Engineering, Mattaria, Helwan University, Egypt.
3Assoc. Prof., Mechanical Power Engineering Department, Faculty of Engineering, Mattaria, Helwan University, Egypt.
Abstract
Wells turbine is very adept at converting pneumatic power from ocean waves into mechanical energy. However, such turbines incur from low performance, limited operating range and low efficiency. The present study introduces a method to enhance the power produced from Wells turbine by implementing rectangular Gurney flap (GF). The Gurney flap is placed on both pressure and suction sides of the trailing edge (TE) and perpendicular to the chord line without change chord length. GF increases the lift coefficient by altering the Kutta condition at the TE. The turbine performance is herein evaluated by solving numerically 3D incompressible Reynolds Averaged Navier–Stokes equations (RANS) by using ANSYS Fluent 19.0. The performance is demonstrated according to the flow coefficient, torque coefficient, total pressure loss coefficient, and the turbine efficiency, as well as the velocity and pressure fields around the turbine blades. The validation of the present work was achieved using previous experimental work and CFD work by using SST k−ω turbulence model. The present work showed that the Wells turbine augmented with GF increases the torque coefficient by 41.98%. Besides, the stall has been delayed compared with the conventional Wells turbine.
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