Author(s) :

Bashir Isyaku Kunya, C. O. Folayan, G. Y. Pam, F. O. Anafi.

Volume/Issue :

Abstract :

This research work numerically studied the effect of varying inter-bumps distances (spacing) at the leading edge of aerofoil on efficiency using NASA LS(1)-0413 cross-section profiles; it’s an inspiration from the natural Humpback Whale pectoral flippers. Spalart Allmaras turbulence model was used for numerical solutions. The parameters investigated include, lift, and drag, angle of attack and inter-bumps distance at Reynolds numbers of 2.5 X 104, 4.9 X 104, and 7.2 X 104. The validation of this work with an experimental work has shown a reasonably good prediction. The results show that bumps on the blade leading edge have an advantage at a higher angle of attack on the performance and varies with Reynolds number and bumps spacing. As Reynolds number increases performance increases between 00 and 150 angles of attack. Bumps spacing has effect on the aerofoil performance at low wind speed (that is, low Reynolds number) at angle of attack in the range, 120 to 250. This research can offer more insight into the design of wind turbine blades and aerofoil for other aerodynamic applications especially at low wind speed locations.

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