

InterviewSolution
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What is the surface boundary condition for a thin airfoil at a subsonic flow? (Where shape of the airfoil is represented as y = f(x))(a) \(\frac {∂ϕ}{∂x}\) = V∞ \(\frac {df}{dx}\)(b) \(\frac {∂ϕ}{∂y} = \frac {df}{dy}\)(c) \(\frac {∂ϕ}{∂x}\) = – V\(_∞^2 \frac {df}{dx}\)(d) \(\frac {∂ϕ}{∂x} = \frac {dV_∞}{dx}\)I got this question in exam.My question comes from Linearized Subsonic Flow in division Linearized and Conical Flows of Aerodynamics |
Answer» The correct choice is (a) \(\frac {∂ϕ}{∂x}\) = V∞ \(\frac {df}{DX}\) |
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