Question

2. A turbine blade 6.3 cm long, with cross-sectional area A = 4.6 x10-4 m2 and perimeter
P = 0.12 m, is made of stainless steel (k = 18 W/(
mK)). The temperature of the
root, Ts, is 482 °C. The blade is exposed to a hot gas at 871 °C, and the heat transfer
coefficient h is 454 W/(m². K). Determine the temperature of the blade tip and the
rate of heat flow at the root of the blade. Assume that the tip is insulated.​

Answer 1

Answer:

Explanation:

 

HEAT TRANSFER

1.

 

A wall of 0.5m thickness is to be constructed from a material which has an averagethermal conductivity of 1.4 W/mK. The wall is to be insulated with a material havingan average thermal conductivity of 0.35 W/mK so that the heat loss per square metrewill not exceed 1450 W. Assuming that the inner and outer surface temperatures are1200 °C and 15 °C respectively, calculate the thickness of the insulation required.