quiz-solution6

# quiz-solution6 - ( - o , l ) = A 1 sin ( + sin ) + A 3 sin...

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650:460 Aerodynamics Quiz No. 6 - Solution Prof. Doyle Knight Tel: 732 445 4464, Email: doyleknight@gmail.com OFce hours: Tues and Thur, 4:30 pm - 6:00 pm and by appointment ±all 2009 1

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Quiz No. 6 A rectangular airfoil has an aspect ratio AR = 6 at an angle of attack α = 6 . The wing section is NACA 0012. There are no Faps. Use two non-zero terms in the ±ourier expansion for the circulation distribution Γ( φ ) and evaluate the monoplane equation at φ = 45 and φ = 90 . Compute the lift coe²cient C L . Solution The monoplane equation with two non-zero terms is
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Unformatted text preview: ( - o , l ) = A 1 sin ( + sin ) + A 3 sin 3 (3 + sin ) or NACA 0012, o , l = 0 . The angle of attack is = 6 = 0 . 1047 radians. Also = ca o 8 s = 2 c 4 b = 2 AR = 0 . 2618 2 Quiz No. 6 Applying the monoplane equation at = 45 and 90 , . 01939 = 0 . 6851 A 1 + 1 . 055 A 3 . 02742 = 1 . 2618 A 1-1 . 785 A 3 and thus A 1 = 0 . 02488 and A 3 = 0 . 00223 Thus, C L = AR A 1 = 0 . 469 3...
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## This note was uploaded on 12/15/2009 for the course 650 460 taught by Professor Knight during the Spring '09 term at Rutgers.

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quiz-solution6 - ( - o , l ) = A 1 sin ( + sin ) + A 3 sin...

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