An airfoil with a characteristic length of 0.2 ft is placed in airflow at 1 atm and

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An airfoil with a characteristic length of 0.2 ft is placed in airflow at 1 atm and 60°F with free stream velocity of 150 ft/s and convection heat transfer coefficient of 21 Btu/h·ft2·8F. If a second airfoil with a characteristic length of 0.4 ft is placed in the airflow at 1 atm and 60°F with free stream velocity of 75 ft/s, determine the heat flux from the second airfoil. Both airfoils are maintained at a constant surface temperature of 180°F.

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