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LoginThe relation between lift coefficient and moment coefficient about the leading edge is_______
(a) cm,le=-(\(\frac {c_l}{2}+\frac {\pi }{4}\)(A1-A2))
(b) cm,le=-(\(\frac {c_l}{4}+\frac {\pi }{4}\)(A1-A2))
(c) cm,le=-(\(\frac {c_l}{4}\)+(A1-A2))
(d) cm,le=(\(\frac {c_l}{2}+\frac {\pi }{4}\)(A1-A2))
The question was asked in semester exam.
My enquiry is from The Cambered Airfoil in chapter Incompressible Flow over Airfoils of Aerodynamics
Aerodynamics Incompressible Flow over Airfoils in Aerodynamics 3 years ago
Correct choice is (B) cm,LE=-(\(\FRAC {c_l}{4}+\frac {\pi }{4}\)(A1-A2))
To explain I would say: The lift coefficient is cl=π(2A0+A1). When we put this in the formula for moment coefficient about the leading edge, cm,le=-0.5π(A0+A1-0.5A2) we GET the desired relation.
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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