2.16. It is proposed to estimate the uniform velocity U. of a stream of air of temperature 20°C by measuring the temperature of a thin metallic blade that is heated and inserted parallel to U in the airstream (Fig. P2.16). The width of the blade (i.e., the dimension aligned with U) is L = 2 cm. The blade is considerably longer in the direction normal to the figure; therefore, the boundary layer flow that develops is two-dimensional. The blade is heated volumetrically by an electric current so that 0.03 W electrical power is dissipated in each square centimeter of metallic blade. It is assumed that the blade is so thin that the effect of heat conduction through the blade (in the x direction) is negligible. A temperature sensor mounted on the trailing edge of the blade reads T = 30°C. Calculate the free-stream velocity U that corresponds to this reading. UT = 20°C - T = 30°C

2.16. It is proposed to estimate the uniform velocity U. of a stream of air of temperature 20°C by measuring the temperature of a thin metallic blade that is heated and inserted parallel to U in the airstream (Fig. P2.16). The width of the blade (i.e., the dimension aligned with U) is L = 2 cm. The blade is considerably longer in the direction normal to the figure; therefore, the boundary layer flow that develops is two-dimensional. The blade is heated volumetrically by an electric current so that 0.03 W electrical power is dissipated in each square centimeter of metallic blade. It is assumed that the blade is so thin that the effect of heat conduction through the blade (in the x direction) is negligible. A temperature sensor mounted on the trailing edge of the blade reads T = 30°C. Calculate the free-stream velocity U that corresponds to this reading. UT = 20°C - T = 30°C

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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