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Unformatted text preview: AAE 334, Fall 2011, Homework 1 SOLUTIONS Due Wednesday, August 24 at the beginning of class. Simple review problems. Show units throughout and work the problem in the system of units in which it is posed. 1. For a flow of air with density of 0.85 kilograms per cubic meter and speed of 60 meters per second, find the dynamic pressure in Pascals. Dynamic pressure, q , is 2 2 1 V q ρ = 2 3 60 85 . 2 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ = s m m kg q ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ = 2 2 3 3600 85 . 2 1 s m m kg q kPa Pa m N m s m kg s m m kg q 53 . 1 1530 1530 1 1530 1530 2 2 2 2 2 3 = = = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ = = kPa Pa q 53 . 1 1530 = = 2. An airfoil with a 2 meter chord has a lift coefficient of 0.28. For flight conditions given in #1 above, what is the lift force per span generated by the airfoil? Lift force per span is the product of lift coefficient, chord, and dynamic pressure: ( ) ( Pa m q c c L l 1530 2 28 . = = ′ ) ( ) m Pa L 1530 56 . ×...
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 Fall '09
 COLLICOTT
 Kilogram, Imperial units, United States customary units, 1 Newton, 1 90 ft, 1 90 lb

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