Influence of passive deformation in the lift coefficient of a NACA0012 wing model Duran, E. Lorite-Díez, Manuel Konovalov Shishov, N. Gutierrez Castillo, P. Del Pino, Carlos Lift coefficient Passive deformation NACA0012 The extensive use of lightweight materials in aerial vehicle wings involves structural flexibility phenomena that generate non-negligible deformation effects. This influence is not restricted to big aircraft but also plays a role in smaller aeroplanes and Unmanned Aerial Vehicles (UAVs). Here, we conduct wind tunnel experiments to analyze the effect of passive deformation on the wing model lift slopes. To isolate the deformation effect, we compare rigid wings with a NACA0012 airfoil imposing a prescribed spanwise deformation. We study three levels of deformation: non-deformed, around 2% and 4.5% of tip deflection. Also, we consider the effect of the wing length by using three different semi-aspect ratios (1, 2, and 4), so a total of nine rigid wing models have been analyzed for a range of Reynolds number from 80×103 to 160×103. Deformed wing models show an increase in lift coefficient compared to non-deformed wing cases. Both deformation levels exhibit a qualitatively similar lift increment. A correlation to predict lift coefficient slope in a flat plate is adapted for a NACA0012 airfoil and validated using our experimental results and literature data. The adjusted correlation can quantify the deformation effect on the lift slope, which is comparable to using a slightly longer wing model. 2024-05-28T08:55:20Z 2024-05-28T08:55:20Z 2024-02-17 journal article Duran, E., et al. Influence of passive deformation in the lift coefficient of a NACA0012 wing model. European Journal of Mechanics / B Fluids 105 (2024) 338–345 [10.1016/j.euromechflu.2024.02.007] https://hdl.handle.net/10481/92146 10.1016/j.euromechflu.2024.02.007 eng http://creativecommons.org/licenses/by-nc/4.0/ open access Atribución-NoComercial 4.0 Internacional Elsevier