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TECHNICAL PAPERS: Internal Combustion Engines

Engine Fuel Droplet High-Pressure Vaporization Modeling

[+] Author and Article Information
G.-S. Zhu, R. D. Reitz

Engine Research Center University of Wisconsin—Madison, 1500 Engineering Drive, Madison, WI 53706

J. Eng. Gas Turbines Power 123(2), 412-418 (Dec 06, 2000) (7 pages) doi:10.1115/1.1361058 History: Received July 11, 2000; Revised December 06, 2000
Copyright © 2001 by ASME
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References

Figures

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Predictions of single-component n-butane-nitrogen, n-heptane-nitrogen, and n-decane-nitrogen vapor-liquid equilibrium systems using semicontinuous vapor-liquid equilibrium model, compared with corresponding experimental data of Knapp et al. 24
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Phase-equilibrium in terms of pressure-temperature diagrams for (a) diesel-nitrogen system, diesel fuel with distribution parameters αL=18.5,βL=10.0, and γL=0.0, and for (b) gasoline-nitrogen system, gasoline fuel with parameters αL=5.7,βL=15.0, and γL=0.0. Solid lines: real fuels; Dashed lines: single-component fuels.
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Critical mixing temperature versus critical mixing pressure for both diesel-nitrogen and gasoline-nitrogen vapor-liquid equilibrium systems. Typical homogenous charge gasoline and diesel engine operating conditions are shown in the cross-hatched regions.
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Surface temperatures (upper) and area regression rates (lower) of droplets versus time at four different reduced pressures. Solid lines: diesel fuel. Dashed lines: single-component fuel.
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Time histories of boiling temperature at reduced pressure of 0.1 and critical mixing temperature at reduced pressure of 3.0 for diesel droplet
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Mass vaporization rate and vapor mole fraction at droplet surface versus time at reduced pressure of Pr=3. Solid lines: diesel fuel. Dashed lines: single-component fuel.
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Mean molecular weight of diesel droplet and variance of diesel liquid phase distribution versus time at three different reduced pressures
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Surface area regression rates of droplets versus time at three different reduced pressures. Solid lines: gasoline fuel. Dashed lines: single-component fuel.
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Normalized lifetimes versus ambient pressure of droplets of diesel and gasoline and the single-component counterpart fuels. Solid lines: real fuels. Dashed lines: single-component fuels.

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