The oxidized-aluminum wing of an aircraft has achord
Chapter 12, Problem 12.128(choose chapter or problem)
The oxidized-aluminum wing of an aircraft has achord length of Lc?4 m and a spectral, hemispher-ical emissivity characterized by the followingdistribution.(a) Consider conditions for which the plane is on the ground where the air temperature is 27C, thesolar irradiation is 800 W/m2, and the effectivesky temperature is 270 K. If the air is quiescent,what is the temperature of the top surface of thewing? The wing may be approximated as a hori-zontal, flat plate.(b) When the aircraft is flying at an elevation ofapproximately 9000 m and a speed of 200 m/s, theair temperature, solar irradiation, and effective skytemperature are?40C, 1100 W/m2, and 235 K,respectively. What is the temperature of thewings top surface? The properties of the air maybe approximated as ??0.470 kg/m3, ??1.50?10?5N?s/m2, k?0.021 W/m?K, and Pr0 ? .72.
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