Numerical Study of Opposed-Jet H2/Air Diffusion Flame - Vortex Interactions

2000 ◽  
Vol 158 (1) ◽  
pp. 365-388 ◽  
Author(s):  
JERRY C. LEE ◽  
CHRISTOS E. FROUZAKIS ◽  
KONSTANTINOS BOULOUCHOS
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
Vortex Interactions ◽  
Air Diffusion ◽  
Opposed Jet

Numerical study on the influence of hydrogen addition on soot formation in a laminar ethylene–air diffusion flame

2006 ◽  
Vol 145 (1-2) ◽  
pp. 324-338 ◽  
Author(s):  
Hongsheng Guo ◽  
Fengshan Liu ◽  
Gregory J. Smallwood ◽  
Ömer L. Gülder
Keyword(s):  
Diffusion Flame ◽  
Soot Formation ◽  
Numerical Study ◽  
Hydrogen Addition ◽  
Air Diffusion

scholarly journals Numerical study of inlet air swirl intensity effect of a Methane-Air Diffusion Flame on its combustion characteristics

2020 ◽  
Vol 18 ◽  
pp. 100610 ◽  
Author(s):  
Amirjavad Ahmadian Hosseini ◽  
Maryam Ghodrat ◽  
Mohammad Moghiman ◽  
Seyed Hadi Pourhoseini
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
Combustion Characteristics ◽  
Intensity Effect ◽  
Swirl Intensity ◽  
Air Diffusion

scholarly journals Numerical study of the injection conditions effect on the behavior of hydrogen-air diffusion flame

2021 ◽  
pp. 314-314
Author(s):  
Mohammed Boukhelef ◽  
Mounir Alliche ◽  
Mohamed Senouci ◽  
Habib Merouane
Keyword(s):  
Probability Density Function ◽  
Diffusion Flame ◽  
Energy Production ◽  
Numerical Study ◽  
Clean Energy ◽  
Practical Case ◽  
Polluting Emissions ◽  
Air Diffusion ◽  
Probability Density Function Pdf ◽  
Very High

In order to respond to the increased demand for clean energy without harming the atmosphere through polluting emissions, Energy production from the hydrogen combustion become largely used. This work presents a numerical study of the injection conditions effect on the structure of the H2-Air diffusion flame. The aim is to reproduce a practical case of non-polluting combustion and resulting in very high temperatures. The configuration is composed of two axisymmetric coaxial jets, as can be found in the diffusion burners. A presumed probability density function (PDF) approach is used to describe the chemistry-turbulence interaction. K-epsilon model of turbulence is used. Particular attention is given to phenomena anchoring or blowout of the flame.

scholarly journals A Numerical Study on the Effects of CO2/N2/Ar Addition to Air on Liftoff of a Laminar CH4/Air Diffusion Flame

2010 ◽  
Vol 182 (11-12) ◽  
pp. 1549-1563 ◽  
Author(s):  
Hongsheng Guo ◽  
Jiesheng Min ◽  
Cedric Galizzi ◽  
Dany Escudié ◽  
Françoise Baillot
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
Air Diffusion

scholarly journals ANALYSIS OF THE TURBULENCE-RADIATION INTERACTION IN A METHANE-AIR DIFFUSION FLAME

2018 ◽  
Vol 17 (1) ◽  
pp. 86
Author(s):  
G. C. Fraga ◽  
A. P. Petry ◽  
F. H. R. França
Keyword(s):  
Heat Flux ◽  
Heat Source ◽  
Diffusion Flame ◽  
Radiative Heat ◽  
Numerical Study ◽  
Heat Fluxes ◽  
Fire Dynamics ◽  
Eddy Simulation ◽  
Volume Method ◽  
Air Diffusion

The phenomenon of turbulence-radiation interaction (TRI) has been demonstrated experimentally, theoretically and numerically to be important in a great number of engineering applications. This paper presents a numerical study on the subject, focusing on a methane-air diffusion flame confined in a rectangular enclosure. An open source, Fortran-based code, Fire Dynamics Simulator, is used for the analysis. Large Eddy Simulation (LES) is adopted to model the turbulence, and to resolve the sub-grid scale terms the dynamic Smagorinsky model is employed. To solve the radiative heat transfer, the finite volume method is used alongside the Weighted-Sum-of-Gray-Gases model. The main objective of the present work is to assess the magnitude of TRI effects for the configuration proposed. For this purpose, the time-averaged wall heat fluxes and volumetric radiative heat source, calculated from the LES results, are compared with those same quantities obtained by independent simulations initialized using mean temperature and species concentration fields. TRI effects are found to be responsible for differences up to 30% between results considering and neglecting turbulent fluctuations. These differences are larger for the radiative heat source and for the radiative heat flux to the walls, smaller for the total heat flux, and almost negligible for the convective heat flux. The influence of the fuel stream Reynolds number on the TRI effects is also evaluated, and a slight decrease on the magnitude of TRI is observed with the increase of that parameter.

Effects of radiation model on the modeling of a laminar coflow methane/air diffusion flame

2004 ◽  
Vol 138 (1-2) ◽  
pp. 136-154 ◽  
Author(s):  
Fengshan Liu ◽  
Hongsheng Guo ◽  
Gregory J. Smallwood
Keyword(s):  
Diffusion Flame ◽  
Radiation Model ◽  
Effects Of Radiation ◽  
Air Diffusion
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