![]() *This research was supported by the US Department of Defense HBCU-MI summer internship program. The tested airfoils were designed for laminar flow conditions, but the results of this work suggest that freestream turbulence makes the lift performance of these airfoils more linear, similar to their performance at higher Reynolds numbers. ![]() This allowed for a broader investigation on the effects of turbulence across the low-Reynolds number regime for both symmetric and cambered airfoils. It usually helps a bit to use low-Re model bu the discrepancies will remain. the reason lies in bad simulation in boundary layer flow. As indicated by the blue arrows in the image below, lift increases when air streamlines are compressed and lower pressure forms above the airfoil. Best suited airfoil was selected and the theoretical lift and drag values were validated with experimental values of wind tunnel test. Hi Also it is common that pressure and lift coeficient are in good agreement wit exp. This force is critical to achieving and maintaining altitude. Lift is probably the most important of the forces that act on aircraft in flight. Force data was also collected at Reynolds numbers of 30,000 and 60,000 with freestream turbulence intensities of 0.5% and 7%. Understanding the Effects of Airfoil Shape on Lift. Data was collected at static angles of attack from -5 to 20 degrees with freestream turbulence intensities of 0.5%, 2.5%, and 7%. Flow fields and force data were measured for full-span NACA 0012, Eppler 387, and SD 5060 airfoils at a Reynolds number of 12,000. ![]() Understanding how turbulence affects lift performance at low Reynolds numbers is important to predicting airfoil behavior in common flight conditions.
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