Analysis of the effect of H 2 0 content on combustion behaviours of a biogas fuel

Abstract

The present work deals with the biogas in a combustor with regard to its combustion features under differing conditions of H 2 0 content and H 2 S. The content of water (H 2 O) vapour has been changed from 0% to 10% and a CFD code has been employed while implementing numerical investigations. In modelling, a combustion model (the PDF/Mixture Fraction) along with a turbulence model (the k-? standard turbulence model) has been utilised. This study also deals with the combustion performances of the biogas by the addition of a different quantity of H 2 O into the biogas. The Emissions and the flame temperature of the biogas through the combustor apparently seem to be strikingly affected by the changes in H 2 O contents. It is interesting to note that the flame temperature zones change their positions and advance to the burner's downstream. The rise in flame temperatures of the biogas can be attributed to the change in H 2 O content caused by a better fuel-air mixture. It is also observed that adding H 2 O into the biogas lowers the axial temperature levels. © 2019 Hydrogen Energy Publications LLC