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TECHNICAL PAPERS: Internal Combustion Engines

Combustion in Gas Fueled Compression: Ignition Engines of the Dual Fuel Type

[+] Author and Article Information
G. A. Karim

Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary T2N 1N4, Canadae-mail: karim@enme.ucalgary.ca

J. Eng. Gas Turbines Power 125(3), 827-836 (Aug 15, 2003) (10 pages) doi:10.1115/1.1581894 History: Received November 01, 2001; Revised July 01, 2002; Online August 15, 2003
Copyright © 2003 by ASME
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References

Figures

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Variations in the calculated temperature of a methane-air charge at different stages of compression and expansion in the absence pilot injection, with changes in equivalence ratio, Ti=323 K
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Schematic representation of the different components of the combustion energy release rate in a dual fuel engine for a heavy load condition
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Schematic representation of the different components of combustion energy release rate in a dual fuel engine for a light load condition
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Variations in the effective energy release rates with crank angle for different total equivalence ratios at a constant pilot quantity of 0.227 kg/h, for methane operation
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Variations of the ignition point with total equivalence ratio for different fuels at constant pilot quantity. The corresponding diesel operation is shown.
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The variation of the calculated temperature at TDC with equivalence ratio in the absence of pilot injection for three different fuels
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Variations in the calculated maximum heat transfer rate with equivalence ratio in the absence of pilot fuel for hydrogen, methane, and propane admissions
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Variation of the calculated maximum energy release rate with equivalence ratio in the absence of pilot injection for propane, methane, and hydrogen operation
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Variations of the calculated charge temperature at ignition with the admission of nitrogen and carbon dioxide in a diesel engine with a fixed pilot quantity
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Variations of the calculated ignition delay and total combustion times with the molar fraction of n-heptane in heptane-methane stoichiometric mixtures in air for two initial temperatures under adiabatic constant volume conditions, Pi=2.8 MPa
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Calculated temporal variations of pressure for different stoichiometric n-heptane methane mixtures with air for adiabatic constant volume reaction, Ti=800 K and Pi=2.8 MPa
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Variations of the calculated minimum compression ratio for regular auto-ignition of different methane–air mixtures in a motored engine. The experimental data of Downs et al. 13 are shown.
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Variations of the suitably modified ignition delay with total equivalence ratio for different fuels
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Correlation of the observed lean operational limits in a dual fuel engine with the corresponding quiescent limits based on pilot combustion temperatures
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Variation of the brake specific energy consumption (BSHC) for a dual fuel engine operating on different fuels at constant pilot quantity
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Variations in the point of ignition with total equivalence ratio for different cetane number pilots with methane-nitrogen fuel mixtures
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Variations of the exhaust concentration of unreacted methane with the intake gas equivalence ratio at a constant pilot quantity with methane operation
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Variation of the unconverted methane in the exhaust gas of a dual fuel engine with methane addition for different pilot quantities
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Variation in the exhaust concentration of carbon monoxide with changes in the gas equivalence ratio for a constant pilot quantity with methane operation
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Logrithmic variations of the exhaust concentration of carbon monoxide with the total equivalence ratio for different pilot quantities with methane operation
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Variation of the volumetric exhaust concentration (log scale) of CO with total equivalence ratio at a constant pilot quantity with methane operation for three different intake mixture temperatures
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Variations in the exhaust concentration of oxides of nitrogen with total equivalence ratio for different pilot quantities with methane operation

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