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LoginThe skin-friction drag coefficient for turbulent flow on the bottom surface of an airfoil, with chord length being 1m is _____ (Reynolds number at the trailing edge Rec=32×10^5)
(a) 0.074
(b) 0.0037
(c) 0.027
(d) 0.0074
I have been asked this question in semester exam.
This intriguing question comes from Turbulent Flow in section Incompressible Flow over Airfoils of Aerodynamics
Aerodynamics Incompressible Flow over Airfoils in Aerodynamics 3 years ago
Correct choice is (B) 0.0037
To explain: The turbulent skin-friction coefficient, Cf=\(\FRAC {0.074}{\SQRT[5]{Re_c}}\). Putting the given values, we get the answer as 0.01328. This is the coefficient for any one side of the AIRFOIL and is the same for both top and bottom surfaces.
Posted on 02 Dec 2021, this text provides information on Aerodynamics related to Incompressible Flow over Airfoils in Aerodynamics. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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