2010_sol

2010_sol - AAE 333 Exam 2 Wed Dec 2 8PM-10PM Open...

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Wed Dec 2 , 8PM-10PM Open Book (Closed notes) 1 Crib Sheet (two sided) Calculator allowed Hand in Scratch work Do not staple to Scantron PUT YOUR Purdue ID ON THE SCANTRON !!! Include 00 1) For what value of the constant “b” does the velocity potential φ = x^2 + b y^2 represent an incompressible flow? a. 1 b. 2 c. -1 d. -2 e. 0 2) What are the {x,y} velocity components corresponding to the stream function ψ = 2 x y. a. u=2 y , v=2 x b. u=2 x , v=-2 y c. u=-2 x , v= 2 y d. u=x^2 y, v=x y^2 e. u=x y^2 , v=-x^2 y 3) The minimum gage pressure on the surface of an airfoil is -200 Pa when the free stream velocity is 10 m/s. If the free stream velocity is increased to 20 m/s, the minimum gage pressure will change (neglecting viscous effects) to a. 0 Pa b. 200 Pa c. -400 Pa d. -600 Pa e. -800 Pa 4) The NACA 3412 airfoil has a maximum distance between the chord line and the camber line of a. 12% of chord b. 3 % of chord c. 4% of chord d. 1% of chord e. 2% of chord 5) An airplane flies through sea level air. Its pitot tube reads a gage pressure of 0.2 atm. The air speed

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2010_sol - AAE 333 Exam 2 Wed Dec 2 8PM-10PM Open...

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