Separation of true emulsions in jet devices

Сажин, Б. С.; Tyurin, M. P.; Kochetov, L. M.; Safonov, Roman A.

doi:10.1134/s0040579509010023

Cited by 2 publications

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“…(14). Consequently, for high flow rates the rate of filtration for large Re numbers is expressed by the general formula (15) After introducing the Darcy number defined as (16) which is a ratio of the viscous friction force to the pres sure force, from expression (15), we obtain (17) According to experimental data [13,14], the depen dence of the Da number on the Re number (15) for large values of can be expressed by the empiri cal equation (18) As it follows from Fig. 3, the upper boundary of the use of Darcy's law is determined by the critical value of the Re number, which varies in the range [1].…”

Section: Development Of a Model For The Filtration Of Oils With High mentioning

confidence: 99%

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Processes of the aggregation and coagulation of asphaltene particles in petroleum and oil emulsion

Келбалиев

Rzaev

Расулов

et al. 2015

Theor Found Chem Eng

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The simulation of the phenomena of asphaltene particle coagulation and fragmentation in the bulk of petroleum and oil emulsion is considered. In particular, the collision rate was determined and the dis tribution function was constructed with the use of the Fokker-Planck equation. A model of the flow and fil tration of structured oil in a porous medium with high concentrations of asphaltenes, tars, and paraffins is proposed. Models for the adsorption of asphaltenes on the surface of water drops in the course of oil emulsion separation are given.

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Section: Development Of a Model For The Filtration Of Oils With High mentioning

confidence: 99%

“…The formation of an adsorption layer on the surface of water drops with elastic and viscous properties facilitates the stabiliza tion of petroleum emulsions [17]. The mechanism of formation of adsorption films on the surface is deter mined by the following stages:…”

Section: Effect Of Asphaltene Content On the Separation Of Oil Emulsionsmentioning

confidence: 99%

Processes of the aggregation and coagulation of asphaltene particles in petroleum and oil emulsion

Келбалиев

Rzaev

Расулов

et al. 2015

Theor Found Chem Eng

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Characterization of fuel/water mixtures and emulsions with ethanol using laser-induced fluorescence

et al. 2020

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In charged spark-ignition engines, additional water injection allows for the reduction of temperature under stoichiometric mixture conditions. However, a higher complexity of the injection and combustion processes is introduced when a mixture of fuel and water (“emulsion”) is injected directly into the combustion chamber using the same injector. For this purpose, the mixture must be homogenized before injection so that a reproducible composition can be adjusted. In principle, gasoline and water are not miscible, and may form an unstable macro-emulsion during mixing. However, the addition of ethanol, which is a biofuel component that is admixed to gasoline, can improve the mixing and may lead to a stable micro-emulsion. For the assessment of the distribution of the water and fuel phases in the mixture, a novel imaging concept based on laser-induced fluorescence (LIF) is proposed. In a first spectroscopic study, a fluorescence dye for imaging of the water phase is selected and evaluated. The fluorescence spectra of the dye dissolved in pure water are investigated under varied conditions using a simplified pressure cell equipped with a stirrer. The study comprises effects of temperature, dye concentration, and photo-dissociation on fluorescence signals. In a second step, fuel is mixed with water (5 vol. % to 10 vol. %) containing the dye, and the water dispersion in the fuel is investigated in an imaging study. Additionally, the miscibility of fuel and water is studied for varying ethanol content, and the homogeneity of the mixture is determined. These first investigations are also essential for the assessment of the potential of the LIF technique for studying the distribution of the water phase in internal combustion engine injection systems and sprays.

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Separation of true emulsions in jet devices

Cited by 2 publications

References 0 publications

Processes of the aggregation and coagulation of asphaltene particles in petroleum and oil emulsion

Processes of the aggregation and coagulation of asphaltene particles in petroleum and oil emulsion

Characterization of fuel/water mixtures and emulsions with ethanol using laser-induced fluorescence

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