TY - JOUR
TI - Numerical study of turbulent normal diffusion flame CH4-air stabilized by coaxial burner
AU - Riahi Zouhair
AU - Mergheni Mohamed Ali
AU - Sautet Jean-Charles
AU - Ben Nasrallah Sassi
JN - Thermal Science
PY - 2013
VL - 17
IS - 4
SP - 1207
EP - 1219
PT - Article
AB - The practical combustion systems such as combustion furnaces, gas turbine,  engines, etc. employ non-premixed combustion due to its better flame  stability, safety, and wide operating range as compared to premixed  combustion. The present numerical study characterizes the turbulent flame of  methane-air in a coaxial burner in order to determine the effect of airflow  on the distribution of temperature, on gas consumption and on the emission of  NOx. The results in this study are obtained by simulation on FLUENT code. The  results demonstrate the influence of different parameters on the flame  structure, temperature distribution and gas emissions, such as turbulence,  fuel jet velocity, air jet velocity, equivalence ratio and mixture fraction.  The lift-off height for a fixed fuel jet velocity is observed to increase  monotonically with air jet velocity. Temperature and NOx emission decrease of  important values with the equivalence ratio, it is maximum about the unity.