Inconel® refers to a class of nickel-chromium-based superalloys that are used in high-temperature applications, such as gas turbine blades. For further improvement in the performance of gas turbine engine, the outer blade surface is coated with ceramic-based thermal barrier coating (TBC). Consider a flat Inconel® plate, with a thickness of 12 mm, is coated with a layer of TBC, with a thickness of 300 mm, on its surface. At the interface between the Inconel® and the TBC, the thermal contact conductance is 10,500 W/m2∙K. The thermal conductivities of the Inconel® and the TBC are 25 W/m∙K and 1.5 W/m∙K, respectively. The plate is in a surrounding of hot combustion gasses at 1500°C, and the convection heat transfer coefficient is 750 W/m2∙K. Determine the temperature at the mid-plane of the Inconel® plate, if the outer surface temperature is 1200°C.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Inconel® refers to a class of nickel-chromium-based
superalloys that are used in high-temperature applications,
such as gas turbine blades. For further improvement in the
performance of gas turbine engine, the outer blade surface
is coated with ceramic-based thermal barrier coating
(TBC). Consider a flat Inconel® plate, with a thickness of
12 mm, is coated with a layer of TBC, with a thickness
of 300 mm, on its surface. At the interface between the
Inconel® and the TBC, the thermal contact
10,500 W/m2∙K. The thermal conductivities of the Inconel®
and the TBC are 25 W/m∙K and 1.5 W/m∙K, respectively.
The plate is in a surrounding of hot combustion gasses at
1500°C, and the
W/m2∙K. Determine the temperature at the mid-plane of
the Inconel® plate, if the outer surface temperature is
1200°C.
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