Quantitative one-dimensional single-pulse multi-species concentration and temperature measurement in the lift-off region of a turbulent H2/air diffusion flame

1995 ◽  
Vol 61 (6) ◽  
pp. 533-545 ◽  
Author(s):  
A. Brockhinke ◽  
P. Andresen ◽  
K. Kohse-H�inghaus
Keyword(s):  
Temperature Measurement ◽  
Diffusion Flame ◽  
Single Pulse ◽  
Species Concentration ◽  
One Dimensional ◽  
Lift Off ◽  
Air Diffusion

scholarly journals Non-Premixed Filtered Tabulated Chemistry: Filtered Flame Modeling of Diffusion Flames

Fuels ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 87-107
Author(s):  
Pedro Javier Obando Vega ◽  
Axel Coussement ◽  
Amsini Sadiki ◽  
Alessandro Parente
Keyword(s):  
Flame Front ◽  
Diffusion Flame ◽  
Diffusion Flames ◽  
Premixed Combustion ◽  
One Dimensional ◽  
Counterflow Flame ◽  
Tabulated Chemistry ◽  
Laminar Diffusion ◽  
Lift Off ◽  
The One

The flame front filtering is a well-known strategy in turbulent premixed combustion. An extension of this approach for the non-premixed combustion context has been proposed by means of directly filtering counterflow diffusion flamelets. Promising results were obtained for the non-premixed filtered tabulated chemistry formalism on 1-D and 2-D unresolved counterflow flame configurations. The present paper demonstrates the soundness of this approach on a 3-D real laminar non-premixed coflow flame. The model results are compared against the direct filtering of the fully resolved laminar diffusion flame showing that the formalism adequately describes the underlying physics. The study reveals the importance of the one-dimensional counterflow flamelet hypothesis, so that the model activation under this condition is ensured by means of a flame sensor. The consistent coupling between the model and the flame sensor adequately retrieves the flame lift-off and satisfactorily predicts the profile extension due to the filtering process.

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

An Analysis of Coupled Multicomponent Diffusion in Interstitial Tissue

1994 ◽  
Vol 116 (2) ◽  
pp. 164-171 ◽  
Author(s):  
P. D. Schreuders ◽  
K. R. Diller ◽  
J. J. Beaman ◽  
H. M. Paynter
Keyword(s):  
Multicomponent Diffusion ◽  
Frequency Parameter ◽  
Interstitial Tissue ◽  
Specific System ◽  
Species Concentration ◽  
One Dimensional ◽  
Jump Distance ◽  
Local Species ◽  
The Individual ◽  
Graph Form

A one-dimensional multicomponent kinetic model was developed to simulate the interstitial diffusion of macromolecules in a three component system, consisting of water, the macromolecule and the interstitial matrix. Movement of the individual components was modeled as occurring in finite jumps between discrete low energy wells along paths defined in terms of species occupation. The flow rate was expressed as a function of the local species concentration, the jump distance, and a kinetic frequency parameter. The model, implemented in pseudo-bond graph form, was examined by fitting it to data obtained for the transport of fluorescein tagged dextran to determine the kinetic constants for that specific system.

scholarly journals The effect of diluent gases on ion formation in hydrocarbon flames

1978 ◽  
Vol 56 (17) ◽  
pp. 2273-2277 ◽  
Author(s):  
Brenda L. Chawner ◽  
Arthur T. Blades
Keyword(s):  
Diffusion Flame ◽  
Formation Process ◽  
Hydrocarbon Flames ◽  
Ion Formation ◽  
Air Diffusion

It has been demonstrated that the addition of N2, CO, Ne, Ar, Kr, Xe, CO2, and CF4 to a H2-air diffusion flame containing He and traces of CH4 enhances the level of ion formation. This enhancement is proportional to the concentration of both CH4 and the diluent gas, consistent with the proposition that the diluent gas participates in the ion formation process.

Spatially resolved elemental analysis of a hydrogen–air diffusion flame by laser-induced plasma spectroscopy (LIPS)

2001 ◽  
Vol 70 (2) ◽  
pp. 143-152 ◽  
Author(s):  
Shinsuke Itoh ◽  
Masahisa Shinoda ◽  
Kuniyuki Kitagawa ◽  
Norio Arai ◽  
Yong-Ill Lee ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
Diffusion Flame ◽  
Plasma Spectroscopy ◽  
Laser Induced Plasma ◽  
Spatially Resolved ◽  
Air Diffusion

Turbulence / Chemistry Interactions in a Ramp-Stabilized Supersonic Hydrogen-Air Diffusion Flame

2014 ◽  
Author(s):  
Jesse A. Fulton ◽  
Jack R. Edwards ◽  
Andrew D. Cutler ◽  
James C. McDaniel ◽  
Christopher P. Goyne
Keyword(s):  
Diffusion Flame ◽  
Air Diffusion
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