CFD Modelling of CH4/Air Flames Characteristics Issuing from a Two-Slot EV-Burner

Document Type : Original Article

Authors

Department of Mechanical Power Engineering, Faculty of Engineering at El-Mataria, Helwan University, Egypt.

Abstract

The need for high power, stable and efficient combustion, high turndown ratio and low noise 
while complying with the ever-increasing stringent environmental standards has proven to be 
a great challenge for scientists and engineers. Environmental Vortex (EV) burners appear to be 
one of the promising ways to fulfill this challenge via inducing self-swirl flows to enhance fuel 
and air mixing and hence to provide efficient combustion with low emissions. This paper 
introduces a CFD algorithm to predict the flame flow fields and exhaust emissions for a twoslot half cone EV-burner. The examined test cases are conducted at a fixed air flow rate and 
varying equivalence ratio. The turbulence model used is the Baseline Explicit Algebraic 
Reynold Stress Model (BSL EARSM). This model combines the advantages of the scale 
determining models and the non-linear constitutive models, The former provides scalar 
information about the turbulence while the later determines the Reynolds stress tensor 
responsible for capturing non-equilibrium effects. This combination has proven to be even 
superior to the Shear Stress Transport (SST) model, the recommended model for aerodynamics 
applications. The predicted exhaust temperatures and NOx emissions are in good compliance 
with the experimentally measured values.

Keywords

Engineering Research Journal
Volume 176, Issue 0
December 2022
Pages 171-184

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