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- W2045437935 abstract "Several observations made by researchers highlighted the fact that humpback whales have a unique feature attributed to tubercles (located on the LE of their flipper) which enhance the maneuverability while seizing their prey. This observation was biomimicked by several researchers and they recorded positive outcome of implementing tubercles on fans as well as wind turbine blades in recent years. This in turn inspired engineers in the aeronautical field to investigate areas where tubercles can be applied so as to successfully improve the currently used aircraft designs. The impact of LE tubercles was investigated in three stages namely, Configuration Development, Validation, and Evaluation. In Configuration Development stage, ordinary straight LE was modified with 6 different combinations of amplitudes and wavelengths using SolidWorks. Following this, numerical simulations were carried out for all configurations using ANSYS-Fluent with NACA 2412 and simulation details of light aircraft (Re=2.185×10 6 ). Results were validated with theory and simulations. Finally, evaluation was completed by thoroughly studying and analyzing the effect of amplitude and wavelength thereby aiding in the selection of optimum configuration (using L/D VS α) and understanding of the tubercle mechanism (by analyzing pressure, vorticity and streamline results obtained from Tecplot. Moreover the results were compared with other studies. Thus, the results obtained indicate that adding tubercles contribute to an enhancement in the post-stall behavior of the aircraft and no noticeable performance improvement in pre-stall angle of attack. Also, the amplitude of the tubercled LE has a larger effect on the performance of the airfoil unlike the wavelength with larger amplitude smaller wavelength being the optimum. 5.33% increase in lift and 2.72% reduction in drag was documented in the poststall operational envelope." @default.
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- W2045437935 date "2013-08-08" @default.
- W2045437935 modified "2023-09-26" @default.
- W2045437935 title "Theoretical and Experimental Investigation of Leading Edge Tubercles on the Wing Performance" @default.
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- W2045437935 doi "https://doi.org/10.2514/6.2013-4300" @default.
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