Water vapour and carbon dixocide as the main products in combustion chamber have strong non-gray radiation properties. This paper presents multidimensional mathematical models developed by zone method considering non-gray radiation properties of gas in combustion chamber. Edwards exponential wide band model (EBWM) is adopted to calculate non-gray radiation properties of gas, and the three-point Gauss-Legendre integral formula is applied to calculate direct radiative exchange areas. Reflected radiative heat fluxes are obtained by Gauss elimination method, and energy balance equations are solved by main variable correction method. An example is given to validate the developed models, and further investigation of effects of flame distribution on heat transfer is carried on.
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