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TECHNICAL PAPERS: Internal Combustion Engines

A Kinetic Investigation of the Role of Changes in the Composition of Natural Gas in Engine Applications

[+] Author and Article Information
E. B. Khalil, G. A. Karim

Department of Mechanical Engineering, The University of Calgary, Calgary T2N 1N4, Canada

J. Eng. Gas Turbines Power 124(2), 404-411 (Mar 26, 2002) (8 pages) doi:10.1115/1.1445438 History: Received October 01, 1998; Revised June 01, 2001; Online March 26, 2002
Copyright © 2002 by ASME
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References

Figures

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The variations of calculated temperature with reaction time for a variety of n-heptane-methane mixtures in air in an adiabatic constant volume process, Ti=800 K,Pi=2.8 MPa, and φ=1.0, dotted lines indicates results with the reduced scheme
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Variations of the calculated delay and total combustion times with n-heptane percentage in n-heptane-methane fuel mixture for two initial temperatures in an adiabatic constant volume process Pi=2.8 MPa and total φ=1.0
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Variations of calculated OH and HO2 concentrations with time for a variety of n-heptane-methane mixtures in air in an adiabatic constant volume process with Ti=800 K,Pi=2.8 MPa and total φ=1.0
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Variations of the rates of selected reactions with time for methane and a fuel mixture (99.9 percent methane and 0.1 percent n-heptane) in air in an adiabatic constant volume process with Ti=800 K,Pi=2.8 MPa and total φ=1.0
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Variations of the rates of selected reactions with combustion temperature for methane and a fuel mixture (99.9 percent methane and 0.1 percent n-heptane) in air in an adiabatic constant volume process with Ti=800 K,Pi=2.8 MPa and total φ=1.0
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Variations of the calculated combustion times with n-heptane percentage in various binary mixtures of n-heptane in an adiabatic constant volume process with Ti=800 K,Pi=2.8 MPa and total φ=1.0
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Variations with time of the calculated temperature of natural gas “A” of Table 1 for various initial temperatures. The corresponding variations for methane at an initial temperature of 800 K are shown; Pi=2.8 MPa
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Variation with time of the normalized concentration of the fuel and for the non-methane components
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Variation in the temperature with time for a natural gas<sample “9,” and for a sample having double the concentration of C4<C5 and C6+
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Variations with time of the relative concentrations of the various n-alkanes components of natural gas “B” in an adiabatic constant volume process. Ti=760 K,Pi=6.26 MPa and total φ=0.583
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Variation in the temperature-time development for the different natural gas samples listed in Table 2

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