Spectral correlated and non-correlated radiative transfer in a finite axisymmetric system containing an absorbing and emitting real gasparticle mixture

Abstract

Radiative transfer in a finite axisymmetric enclosure is investigated for a non-isothermal, inhomogeneous, absorbing, emitting but non-scattering gas-particle mixture. A random statistical narrow band model and the Curtis-Godson approximation are used to calculate the real gas radiative properties. High resolution spectral correlations between the transmissivities of homogeneous and isothermal discretization column elements are treated by an ellipse correlation model which is validated. A discretedirection method is applied to solve the geometrical part of the radiative transfer problem. Applications to planar and finite axisymmetric geometries show that spectral correlations significantly modify, typically 30–50%, the radiative flux and radiative dissipation in practical systems. Non-correlated models may lead to inaccurate qualitative predictions (e.g. the radiative flux sign may be reversed).