采用数值方法对炉内辐射传热公式计算模型的修正

Radiative heat transfer is the main heat transfer mean in industrial furnaces. Although the numerical calculation conditions are available, the engineering algorithms are still the main methods of calculating radiative heat transfer in the early stages of industrial furnace design due to their simplicity and ease of repeated verification. The empirical coefficient of the engineering algorithms is a key factor affecting the accuracy. Therefore, the traditional engineering algorithms of the furnace radiative heat transfer are modified by numerical simulation result in this paper. In the cubic with the participating medium of the absorption coefficient of 0.3 m⁻¹ and the optical thickness of 4.5 (side length of 15 m), the error of radiative heat transfer of this modified algorithm can be reduced from 11.26% to 1.74%, and the application scope of the algorithms are expanded from pure absorption medium to scattering medium. When the optical thickness is about 4.5 and the scattering albedo is less than 10%, the error is less than 2%.