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Chapter 3
Heat Transfer from Combustion Chamber Walls

Excerpt

Cooling the walls of a combustion chamber containing gases at high temperatures, i.e., 1000°C, results in parallel modes of heat transfer, convection and radiation. This problem can be approached by assuming one-dimensional steady-state heat transfer in rectangular coordinates and with constant thermophysical properties.

Convection heat transfer per unit area, from hot gases to the hot side of a wall that separates the cold medium and the hot gases, can be written as:

(QA)convectionhcg(TgTwh)

Radiation heat transfer per unit area from hot gases which are assumed to behave as gray bodies to the hot side of a wall can be written as:

(QA)radiationhrg(TgTwh)==εgσ(Tg4Twh4)

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