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Unformatted text preview: chord point (x = -c/4) 3) Given a 2D foil geometry defined as follows: i. f(x)/c = 0.3 (x/c) 3 – 0.12(x/c) 2 – 0.18(x/c) ii. Angle of attack = 2 degrees iii. Elliptical thickness form w/ to/c = 0.02 (note: leading edge radius for elliptical thickness is given by Rl=0.5((to/c) 2 )) Find the following assuming linear foil theory(given x=0 is midchord, -c/2 is leading edge, c/2 is the trailing edge: a) Lift Coefficient Cl b) Ideal angle of attack c) u/U on the upper surface at x=0 (midchord) d) q/U at the leading edge (using Lighthill correction) 4) Using linearized 2D foil theory for a foil with the following geometry: i. Parabolic meanline fo/c=0.07 ii. Angle of attack = 3 degrees iii. Elliptical Thickness to/c = 0.04 a). Find the Lift coefficient and the value of ϒ (x) at x/c=0.25 b) Plot CPmin vs x/C and find the location and value of Cpmin on this foil...
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This note was uploaded on 02/27/2012 for the course MECHANICAL 2.23 taught by Professor Pauld.sclavounos during the Spring '07 term at MIT.
- Spring '07