Physics, 28.11.2019 05:31 laycihyatt11
Athermocouple junction, which may be approximated as a sphere, is to be used for temperature measurement in a gas stream. the convection coefficient between the junction surface and the gas is h = 400 w/m2 k, and the junction thermophysical properties are k = 20 w/m. k, c = 400 j/kg .k, and =8500 kg/m3. determine the junction diameter needed for the thermocouple to have a time constant of 1 s. if the junction is at 25c and is placed in a gas stream that is at 200c, how long will it take for the junction to reach 199c?
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Athermocouple junction, which may be approximated as a sphere, is to be used for temperature measure...
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