Thermal Characteristics of Biogas Flameless Combustion in Asymmetric Meso-scale Combustor

EasyChair Preprint 6932

Abstract

Thermal characteristics of non-premixed conventional flame and flameless mode at fixed fuel mass flow rate of biogas (60% CH4 + 40% CO2) in an asymmetric meso-scale vortex combustor with axial/tangential oxidizer inlet are investigated in this paper by solving three-dimensional governing equations. Realizable-k–e and the eddy-dissipation concept are used to simulate temperature distribution and combustion stability. The effect of tangential oxidizer inlet mass flow rate on the temperature distribution is also explored. The non-premixed meso-scale flameless combustion is much more stable compared to the non-premixed conventional flame. With a low of 10 % O2 concentration, the meso-scale flameless has higher temperature homogeneity throughout the combustor than flames with higher O2 concentration. The maximum temperature in meso-scale non-premixed conventional flame and flameless combustions were 1870 K and 1250 K respectively. The residence time inside the combustor is higher in flameless mode compared to the conventional flame.

Keyphrases: Biogas, Flameless mode, Tangential air, meso-scale combustor, non-premixed

@booklet{EasyChair:6932,
  author    = {Ali Asmayou and Mazlan Abdul Wahid and Mohammed Bashir Abdulrahman},
  title     = {Thermal Characteristics of Biogas Flameless Combustion in Asymmetric Meso-scale Combustor},
  howpublished = {EasyChair Preprint 6932},
  year      = {EasyChair, 2021}}