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Consider an airfoil in a high-­?speed wind tunnel. At the minimum-­?pressure point on the wing, the...

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Mechanical Engineering

Consider an airfoil in a high-­?speed wind tunnel. At theminimum-­?pressure point on the wing, the velocity is 900 ft/s. Ifthe test section flow velocity is 750 ft/s at standard sea-­? levelconditions:

a) Calculate the pressure coefficient at this point on thewing.

b) Calculate the critical pressure coefficient corresponding tothis flight condition.

c) Comparing your answers from parts (a) and (b), whatconclusion can you make as to the nature of the flow over the wing?What is the significance of this conclusion with respect to thedrag on the airfoil?

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