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16100lectre16_cg

16100lectre16_cg - Important Concepts in Thin Airfoil...

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Important Concepts in Thin Airfoil Theory 1. This airfoil theory can be viewed as a panel method with vortex solutions taking the limits of infinite number of panels & zero thickness & zero camber { } 0 1 0 0 1 ( ) 1 2 2 lim lim vortex panel thin airfoil theory c N j ij i j thickness N camber d dz V K V n x dx γ ξ ξ α γ π ξ π = →∞ = = = K K i ±²²²³²²²´ ±²²²³²²²´ 2. 2 ( ) l LO C π α α = 0 1 (1 cos ) (1 cos ) 2 LO o o o dz d dx c x π α θ θ π θ = = 0 = LC α for 0 dz dx = {i.e. symmetric airfoils}
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