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TECHNICAL PAPERS

Stability of Flames Close to Auto-Ignition Temperatures Generated by Extreme Separated Gas-Air Inlets

[+] Author and Article Information
O. Piepers, P. P. Breithaupt, A. B. N. van Beelen

N.V. Nederlandse Gasunie, 9700 MA Groningen, The Netherlands

J. Energy Resour. Technol 123(1), 50-58 (Nov 06, 2000) (9 pages) doi:10.1115/1.1345731 History: Received March 15, 2000; Revised November 06, 2000
Copyright © 2001 by ASME
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References

Figures

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Correlation between adiabatic flame temperature and NOx formation 1
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Example flameless oxidation system
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Schematic diagram of the test furnace
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Photograph of the 90kW test furnace showing central gas inlet and air side ports
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Schematic representation of engineering key figures in flameless oxidation
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Stability ratio versus distance between air nozzles (90-kW experiments, 10 percent excess air)
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Stability ratio and calculated recirculation factor (Kν) at 20dj as a function of air nozzle distance (90 kW, 10 percent excess air)
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Minimum furnace temperature as a function of percentage secondary air at different air nozzle separations (90-kW system, four jets, dj=10.6,n=1.1, furnace diameter=550 mm)
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Minimum load as a function of percentage secondary air at different air nozzle separations (90-kW system, four jets, dj=10.6,n=1.1, furnace diameter=550 mm)
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Flammability limits for methane-air mixture 26

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