1.

For γ(θ)=2V∞(A0\(\frac {1+cos\theta }{sin⁡\theta }\) + Σ\(_{n=1}^∞\)sin⁡ nθ An) select the statement which is invalid.(a) The solution is valid only for cambered airfoils(b) The solution is valid for all thin airfoils(c) A0 Is the n=0^th term for the Fourier series(d) Kutta condition is satisfied at the trailing edge i.e. θ=π.This question was posed to me in quiz.My doubt stems from The Cambered Airfoil topic in section Incompressible Flow over Airfoils of Aerodynamics

Answer»

The correct choice is (a) The solution is valid only for cambered AIRFOILS

Easy explanation: The solution is valid for all thin airfoils (for symmetric airfoils \(\frac {dz}{dx}\)=0 which MAKES An=0 and GIVES the required solution). This is the general solution. Kutta CONDITION is also satisfied (γ(π)=0).



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