Modelling of radiative properties of particles in pulverized coal flames during oxy-fuel-combustion
In the subproject “Modellierung der Strahlungseigenschaften von Partikeln in Kohlestaubflammen bei der Oxyfuel-Verbrennung” in the collaborative research centre OXYFLAME a physically reasonable modelling of radiation properties of particles occurring during the oxy-fuel coal combustion will be developed. In addition to coal particles, ash and soot particles will be regarded. The objective of this modelling is the use in CFD overall simulations of oxy-fuel coal combustion; this leads to the demands for the model’s acceptable complexity. The scattering behaviour as well as the absorption and emission levels are important for radiant heat transfer during combustion and the particles’ heat management. Knowledge of these properties is indispensable for relyable combustion simulations. Based on the detailed physical consideration as Mie scattering for the scattering behaviour and measurements of emission and absorption levels of particles performed in other subprojects in the collaborative research centre Oxyflame, models for the expected total radiation model should be developed and validated.