Open AccessThe Effect of Bluff Body Shape on Flame Stability in a Non-Premixed Hydrogen-Methan-Air Mixture Combustion
Author(s) -
Fatma Zohra Khelladi,
Mounir Alliche,
Redha Rebhi,
Giulio Lorenzini,
Hijaz Ahmad,
Younes Menni
Publication year - 2021
Publication title -
annales de chimie, science des matériaux/annales de chimie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.158
H-Index - 29
eISSN - 1958-5934
pISSN - 0151-9107
DOI - 10.18280/acsm.450504
Subject(s) - combustion , mechanics , turbulence , diffusion flame , conical surface , diffusion , materials science , flame structure , adiabatic flame temperature , thermodynamics , premixed flame , chemistry , combustor , physics , composite material , organic chemistry
The goal of this study, which focuses on the effect of the bluff-body form on the flame’s stability, is to contribute to the study of the stability of a CH4-H2-Air diffusion flame. It is, in fact, a numerical simulation of a diffusion flame CH4-H2-Air stabilized by a bluff body in three different shapes: cylindrical, semi-spherical and conical. The equations governing turbulent reactive flow are solved using the Ansys CFX program (Navier Stokes equations averaged in sense of Favre). The k-ε model simulates turbulence. For combustion, a mixed EDM/FRC (Finite Rate Combustion) model is utilized. The results of the analysis of temperature profiles, CO2 concentrations, and velocity in axial sections very close to the injector are satisfactory: they meet the criteria of stability, high temperature at a lower speed, and more stable in the case of a cylindrical shape than in the other two cases.