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TECHNICAL PAPERS

Thermal Characteristics of Gaseous Fuel Flames Using High Temperature Air

[+] Author and Article Information
A. K. Gupta

Department of Mechanical Engineering, University of Maryland, College Park, MD 20742e-mail: akgupta@eng.umd.edu

J. Eng. Gas Turbines Power 126(1), 9-19 (Mar 02, 2004) (11 pages) doi:10.1115/1.1610009 History: Received January 01, 2000; Revised April 01, 2003; Online March 02, 2004
Copyright © 2004 by ASME
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References

Figures

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A schematic diagram of flame and heat flux distribution in a furnace with low temperature combustion air, high temperature air, and HiTAC combustion conditions
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A schematic diagram of the experimental test facility
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Stability limits of propane flames at high temperature and different oxygen concentration in air
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Flame photographs with combustion air temperature of 1100°C and O2 concentration (from left to right) of 21%, 8% and 2% (nitrogen as dilution gas)
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Increase in green flame volume with decrease in O2 concentration and increase in air-preheat temperature
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Flame emission spectra at one point in the flame (x=3 cm and Y=1.5 cm) and three air-preheat temperatures (nitrogen as the dilution gas)
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Emission of NOx as a function of air-preheat temperature and O2 concentration in air using propane as the fuel (nitrogen as the dilution gas)
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Emission of NOx as a function of air-preheat temperature and O2 concentration in air using carbon monoxide as the fuel (nitrogen as the dilution gas)
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Heat flux variation along the flame using propane as the fuel, Tair=1000°C (sensor at 6.5 in. from the center axis of flame), arbitrary unit of heat flux
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(a) Methane flame photographs with combustion air temperature of 1000°C and oxygen concentrations (from left to right) of 21%, 8%, and 2%, respectively (nitrogen as dilution gas). (b) Methane flame photographs with combustion air temperature of 1000°C and oxygen concentrations (from left to right) of 21%, 8%, and 2%, respectively (carbon dioxide as dilution gas).
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(a) Acetylene flame photographs with combustion air temperature of 1000°C and oxygen concentrations (from left to right) of 21%, 8%, and 2%, respectively (nitrogen as dilution gas). (b) Acetylene flame photographs with combustion air temperature of 1000°C and oxygen concentrations (from left to right) of 21%, 8%, and 2%, respectively (carbon dioxide as dilution gas).

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