Engineering, 31.03.2020 01:01 sydthekid25

An aircraft instrument nacelle with characteristic length L1 = 0.15 m experiences air flow at T[infinity] = 35°C and V1 = 100 m/s. When the surface temperature is Ts, 1 = 300°C, the total heat transfer rate from the object is found to be q1 = 1500 W. Estimate the rate of heat transfer rate from a second larger object that has the same shape but a characteristic length L2 = 0.3 m if the surface temperature is now Ts, 2 = 400°C in an airflow with T[infinity] = 35°C and V2 = 50 m/s. Hint: What’s the dependence of surface area on characteristic length, e. g. for a sphere.

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An aircraft instrument nacelle with characteristic length L1 = 0.15 m experiences air flow at T[infi...

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