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Question: an airfoil is in a freestream where 061...

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An airfoil is in a freestream where š‘āˆž = 0.61 atm, šœŒāˆž = 0.819 kg/m3 , and š‘‰āˆž = 300 m/s. At a point on the airfoil surface, the pressure is 0.5 atm. Assume cp = 1.0045 kJ/kgā‹…K, R = 0.287 kJ/kgā‹…K and š›¾ = 1.4.

a. Calculate the velocity at that point? List the assumptions you have made?

b. Calculate the error if you assume that the flow is incompressible?Ā 

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