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Which is the incorrect statement with regards to the flow over an airfoil and a wing?(a) Flow over airfoil is 2D(b) Flow over wing is 3D(c) Airfoils have a component of flow along span(d) Wings have a component of flow along spanI got this question by my school principal while I was bunking the class.My question is based upon Downwash and Induced Drag in division Flow over Airfoils over Finite Wing of Aerodynamics

Answer»

Right answer is (C) Airfoils have a component of flow along span

For explanation I would say: WINGS (which by default means finite wings) have a component of flow along span, which gives them 3D CHARACTERISTICS. While airfoils, which are INFINITE wings, have a 2D flow as the span wise component is absent.



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