الفهرس 
chapter 1Only 14 pages are availabe for public view
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Abstract
A thorough theoretical study and experimental one on the effect of fitting the Gurney flaps to the blades of horizontal axis wind turbines have been implemented, in this thesis. For that; a suitable mathematical model was constructed, which can simulate the performance of wind turbines. This mathematical model has been implemented in a computer program that is written in FORTRAN 90. This computer program was used herein to investigate the effect of adding Gurney flaps with different heights and configurations to the blades of a well-designed wind turbine. After that, some experimental tests have been performed on horizontal axis wind turbine scale model in front of an open jet wind tunnel. These tests were performed on three different Gurney flap heights of 1 %, 2 % and 4 % c (of the chord length). It has been found that, Gurney flap of height 2 % c achieves maximum power coefficient higher than the other tested cases.