Answer to Question #241316 in Mechanical Engineering for jkdddglf

Question #241316

A thermocouple is used to measure the temperature of air flowing through a duct. The heat transfer coefficient between the air and the thermocouple is proportional to v0.8, where v is the average velocity of the air within the duct. Assume that the heat transfer by radiation from the duct walls to the thermocouple bead is linearly proportional to the temperature difference between them. For v= 5 m/s, the thermocouple reads 50


1
Expert's answer
2021-09-24T02:13:14-0400

The temperature of air in a duct is measured. Accounting for the radiation effect, and the actual air temperature is to be determined.

The walls of the duct are at a considerably lower temperature than the air in it, and thus we expect the thermocouple to show a reading lower than the actual air temperature as a result of the radiation effect.


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