![]() A wing with a high fineness ratio produces a large amount of skin friction. Moderators: richierich, ua900, PanAm_DC10, hOMSaR. The shape of an airfoil causes air to flow faster on top than on the bottom. This is potential-flow theory with the further assumptions that the airfoil is very thin and the angle of attack is small. The airfoils and wind turbine blades are designed with the objective of highâpower performance. It is important to note the graph precisely, however. ![]() ![]() But here we will use the definition above, without the minus sign. Limitations of thin airfoil theory 5 Viscous and inviscid calculations 25 Potential Flow Theory This is because the viscous effects are limited to a thin layer next to the body called the boundary layer.
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