practice_exam1

# practice_exam1 - Midterm Practice Exam 1 for MAE355 Problem...

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Midterm Practice Exam 1 for MAE355 Problem 1 a. Give the definitions of the lift, drag, and moment coefficients C L , C D , and C M  in mathematical  expressions and name the variables used in these definitions. b. What are the advantages of using these dimensionless coefficients rather than the lift, drag, and  moment themselves? c. What is the unit for kinematic viscosity in SI units? Problem 2 a. What are the similarity parameters for inviscid flows? b. What are the similarity parameters for incompressible, inviscid flows? Problem 3   Consider two different flows over geometrically similar airfoil shapes, one airfoil being twice the size of  the other. The flow over the smaller airfoil has freestream properties given by T = 200K,  ρ = 1.23  kg/m 3 , and  V 100 m/s. The flow over the large airfoil is described by T = 800K,  ρ = 1.739 kg/m 3 and  V = 2 00 m/s. Assume that both

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