Instantaneous radial profiles of oh fluorescence and rayleigh scattering through a turbulent H2-air diffusion flame

1988 ◽  
Vol 21 (1) ◽  
pp. 1561-1568
Author(s):  
D. Stepowski ◽  
K. Labbaci ◽  
R. Borghi
Keyword(s):  
Diffusion Flame ◽  
Rayleigh Scattering ◽  
Radial Profiles ◽  
Air Diffusion

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

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

Prediction of Soot Formation Trends in Turbulent Kerosene-Air Diffusion Jet Flames With Elevated Operating Pressure

2017 ◽  
Author(s):  
Pravin Nakod ◽  
Saurabh Patwardhan ◽  
Ishan Verma ◽  
Stefano Orsino
Keyword(s):  
Environmental Protection Agency ◽  
Volume Fraction ◽  
Soot Formation ◽  
Mixture Fraction ◽  
Soot Volume Fraction ◽  
Operating Pressure ◽  
Jet Flames ◽  
Emission Standard ◽  
Radial Profiles ◽  
Air Diffusion

Emission standard agencies are coming up with more stringent regulations on soot, given its adverse effect on human health. It is expected that Environmental Protection Agency (EPA) will soon place stricter regulations on allowed levels of the size of soot particles from aircraft jet engines. Since, aircraft engines operate at varying operating pressure, temperature and air-fuel ratios, soot fraction changes from condition to condition. Computation Fluid Dynamics (CFD) simulations are playing a key role in understanding the complex mechanism of soot formation and the factors affecting it. In the present work, soot formation prediction from numerical analyses for turbulent kerosene-air diffusion jet flames at five different operating pressures in the range of 1 atm. to 7 atm. is presented. The geometrical and test conditions are obtained from Young’s thesis [1]. Coupled combustion-soot simulations are performed for all the flames using steady diffusion flamelet model for combustion and Mass-Brookes-Hall 2-equation model for soot with a 2D axisymmetric mesh. Combustion-Soot coupling is required to consider the effect of soot-radiation interaction. Simulation results in the form of axial and radial profiles of temperature, mixture fraction and soot volume fraction are compared with the corresponding experimental measured profiles. The results for temperature and mixture fraction compare well with the experimental profiles. Predicted order of magnitude and the profiles of the soot volume fraction also compare well with the experimental results. The correct trend of increasing the peak soot volume fraction with increasing the operating pressure is also captured.

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