Radiative Heat Fluxes Near Turbulent Buoyant Methane Diffusion Flames

1984 ◽  
Vol 106 (4) ◽  
pp. 886-888 ◽  
Author(s):  
S-M. Jeng ◽  
G. M. Faeth
Keyword(s):  
Radiative Heat ◽  
Diffusion Flames ◽  
Heat Fluxes ◽  
Methane Diffusion

scholarly journals Structure and Radiation Properties of Luminous Turbulent Acetylene/Air Diffusion Flames

1988 ◽  
Vol 110 (1) ◽  
pp. 173-181 ◽  
Author(s):  
J. P. Gore ◽  
G. M. Faeth
Keyword(s):  
Radiative Heat ◽  
Diffusion Flames ◽  
Mixture Fraction ◽  
Heat Fluxes ◽  
Band Model ◽  
Spectral Radiation ◽  
Radiative Heat Loss ◽  
Radiation Properties ◽  
Air Diffusion ◽  
Laminar Flamelet

An experimental and theoretical study of the structure and radiation properties of luminous, round, turbulent acetylene/air diffusion flames is described. Measurements were made of mean and fluctuating velocities, mean concentrations, laser extinction (514 and 632.8 nm), spectral radiation intensities (1200–5500 nm), and radiative heat fluxes. The measurements were used to evaluate structure predictions based on the laminar flamelet concept, and radiation predictions based on a narrow-band model both ignoring and considering turbulence/radiation interactions. State relationships needed for the laminar flamelet concept were found from auxiliary measurements in laminar flames. Predictions were encouraging; however, quantitative accuracy was inferior to earlier findings for luminous flames. This is attributed to the large radiative heat loss fractions of acetylene/air flames (approaching 60 percent of the heat release rate); coupled structure and radiation analysis should be considered for improved results. The findings suggest significant turbulence/radiation interactions (increasing spectral intensities 40–100 percent from estimates based on mean properties); and that soot volume fractions may approximate universal fractions of mixture fraction in turbulent acetylene/air diffusion flames.

EXPERIMENTAL EVALUATION OF THE MULTI-POINT SOURCE MODEL FOR PREDICTING RADIATIVE HEAT FLUX EMITTED BY METHANE DIFFUSION FLAMES

2015 ◽  
Author(s):  
Isaías Mortari Machado ◽  
Rodrigo Brenner Miguel ◽  
Nattan Roberto Caetano ◽  
Francis Henrique Ramos França ◽  
Fernando Marcelo Pereira ◽  
...  
Keyword(s):  
Heat Flux ◽  
Point Source ◽  
Experimental Evaluation ◽  
Radiative Heat ◽  
Diffusion Flames ◽  
Source Model ◽  
Radiative Heat Flux ◽  
Methane Diffusion

Hysteresis in stabilization of methane diffusion flames with plasmas

Fuel ◽  
2016 ◽  
Vol 179 ◽  
pp. 362-367 ◽  
Author(s):  
Jingfeng Tang ◽  
Liqiu Wei ◽  
Jian Song ◽  
Daren Yu
Keyword(s):  
Diffusion Flames ◽  
Methane Diffusion

scholarly journals High fidelity radiative heat transfer models for high-pressure laminar hydrogen–air diffusion flames

2014 ◽  
Vol 18 (6) ◽  
pp. 607-626 ◽  
Author(s):  
Jian Cai ◽  
Shenghui Lei ◽  
Adhiraj Dasgupta ◽  
Michael F. Modest ◽  
Daniel C. Haworth
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Diffusion Flames ◽  
High Fidelity ◽  
Air Diffusion ◽  
Transfer Models

Multiphoton Ionization Mass Spectroscopy of Fullerenes in Methane Diffusion Flames

1994 ◽  
Vol 359 ◽  
Author(s):  
H. Hepp ◽  
K. Siegmann ◽  
K. Sattler
Keyword(s):  
Aromatic Hydrocarbons ◽  
Atmospheric Pressure ◽  
Diffusion Flames ◽  
Multiphoton Ionization ◽  
Ionization Mass ◽  
Ionization Time ◽  
Ionization Mass Spectroscopy ◽  
Polycyclic Aromatic ◽  
On Line ◽  
Methane Diffusion

ABSTRACTMultiphoton ionization time-of-flight mass spectrosocopy is used as an on-line technique to investigate polycyclic aromatic hydrocarbons (PAH) and fullerenes in atmospheric pressure flames. We have recorded height profiles of neutral PAH and fullerenes in methane/argon diffusion flames. Fullerenes ranging from C32 to at least C150 are found in a region where PAH concentration starts to decrease. Uniformity of the profiles indicates that the fullerenes do not grow from smaller to larger ones. The influence of the amount of argon additive is discussed.

Separation of heat transfer components from impinging methane diffusion flames

2018 ◽  
Vol 126 ◽  
pp. 123-138 ◽  
Author(s):  
Vinay C. Raj ◽  
Pramod Kuntikana ◽  
S. Sreedhara ◽  
S.V. Prabhu
Keyword(s):  
Heat Transfer ◽  
Diffusion Flames ◽  
Methane Diffusion
Sign in / Sign up

Export Citation Format

Share Document