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Two-phase Numerical Study of Evaporation Characteristics of Moving Binary Droplets at High Pressures
Published in Combustion Institute
2019
Abstract
This paper presents comprehensive numerical simulations of evaporation characteristics of droplets constituted of two liquid fuels moving and evaporating in a high pressure ambient that has fuel vapors and nitrogen gas under normal gravity. A transient, two-phase and axisymmetric numerical model has been used for the simulations. Gas-phase non-idealities, solubility of ambient gas in liquid-phase, and variable thermo-physical properties based on pressure and temperature in both liquid- and vapor-phases are included in the numerical model. High pressure phase equilibrium is used. The range of Weber number has been chosen such that droplet remains almost spherical throughout its lifetime. Simulations are terminated when the droplet surface regresses to one-tenth of its initial value or when the critical state for the mixture is reached. The model is used to systematically study the evaporation characteristics of moving n-heptane-hexadecane droplets in ambient having fuel vapor and nitrogen. The effects of the pressure and ambient vapor concentration on evaporation characteristics have been discussed in detail. © Asia-Pacific Conference on Combustion, ASPACC 2019.All right reserved.
About the journal
Journal12th Asia-Pacific Conference on Combustion, ASPACC 2019
PublisherCombustion Institute
Open AccessNo
Concepts (17)
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    Combustion
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    Critical current density (superconductivity)
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    Evaporation
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    Fuels
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    Heptane
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    Liquids
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    Nitrogen
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    Numerical models
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    Critical state
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    DROPLET SURFACES
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    HIGH-PRESSURE PHASE EQUILIBRIUM
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    NON-IDEALITIES
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    NORMAL GRAVITIES
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    Pressure and temperature
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    VAPOR CONCENTRATIONS
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    VARIABLE THERMO-PHYSICAL PROPERTIES
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    Drops