Evaporation, boiling and explosive breakup of oil–water emulsion drops under intense radiant heating

Стрижак, П. А.; Legros, Jean Claude

doi:10.1016/j.cherd.2017.09.008

Cited by 36 publications

(34 citation statements)

References 23 publications

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“…of water was produced as documented in [12,14]. The volume concentration of water (γ) in the investigated inhomogeneous (two-liquid) drops is 10% in accordance with three main applications [17][18][19][20]: gasification of water fuel emulsions; thermal purification of liquids from unspecified impurities; creation of fuel emulsions with the use of waste oils, oil sludge, industrial effluents, etc.…”

Section: Producing the Tested Emulsion Dropletsmentioning

confidence: 60%

Dispersed phase structure and micro-explosion behavior under different schemes of water-fuel droplets heating

Bellettre

Стрижак

Tarlet

2020

Fuel

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One of the known and still unsolved problems of internal combustion engines and liquid fuel power plants is the complexity of efficient (i.e. with minimal cost of basic resources: time, energy and raw materials) ignition of fuels issued from valorization of waste. A promising way to improve the efficiency of ignition of liquid fuels is a secondary atomization using the micro-explosion of water-fuel droplets.This phenomenon is called micro-explosion when concerning an individual water-in-oil emulsion drop among the combusting spray. This process dramatically accelerates fuel heating and ignition, since fuel droplets issued from the secondary atomization are smaller and faster, increasing interfacial area. To investigate the atomization efficiency and its causes, the present work quantifies the occurrence of successful micro-explosion under large samples of experimental data. The behavior of water-fuel drops in the form of fine, middle-size emulsions or two immiscible liquids is observed using schemes with conductive, convective or radiative heat transfer provided at the same range of temperature.

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Section: Producing the Tested Emulsion Dropletsmentioning

confidence: 60%

Dispersed phase structure and micro-explosion behavior under different schemes of water-fuel droplets heating

Bellettre

Стрижак

Tarlet

2020

Fuel

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“…The droplets are broken by the shear of the high velocity annular jet [16]. Strizhak et al conducted detailed studies of the process of droplet breakage in a gas stream [17][18][19].…”

Section: Methodsmentioning

confidence: 99%

Atomization of Gel Fuels with Solid Particle Addition Utilizing an Air Atomizing Nozzle

et al. 2018

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Microscopic high-speed imaging is used to experimentally measure the velocity and size of droplets of gelled RP-1 based fuels with a solid particle additive. The gels are atomized using an air atomizing nozzle. The droplet diameter and velocity at a fixed position 20 cm from the nozzle on the centerline of the spray are measured at air mass flow rates of 1.5, 3 and 5 g/s. A parametric study is conducted to study the effect of gas mass flow rate, boron particle content, and species of the solid particle on the droplet characteristics. The results indicate that the droplet size decreases with the increasing of gas mass flow rate and boron particle content. Gel fuels with an aluminum particle are observed to produce smaller droplets at a low gas mass flow rate than that with a boron particle. The implication of these observations is that the atomization processes for gelled fuels with an additive of solid particles is controlled by the velocity difference between the gas and the droplets.

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“…The most popular approach to the experimental research into the breakup of boiling liquid, solution, emulsion, and slurry droplets is placing them on a holder into a heated gas flow (e.g., [11][12][13][14][15][16]). Some setups do not include different holders [14][15][16] or use substrates [17]. Each of these recording schemes has its own strengths and weaknesses [10].…”

Section: Motivationmentioning

confidence: 99%

Impact of Holder Materials on the Heating and Explosive Breakup of Two-Component Droplets

et al. 2018

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The heating of two-component droplets and the following explosive breakup of those droplets have been extensively studied over the most recent years. These processes are of high interest, since they can significantly improve the performance of many technologies in fuel ignition, thermal and flame liquid treatment, heat carriers based on flue gases, vapors and water droplets, etc. Research throughout the world involves various schemes of droplet heating and supply (or, less frequently, injection) to heating chambers. The most popular scheme features the introduction of a two-component or multi-component droplet onto a holder into the heating chamber. In this research, we study how holder materials affect the conditions and integral characteristics of droplet heating and explosive breakup: heating time until boiling temperature; minimum temperature sufficient for droplet breakup; number and size of fragments in the resulting droplet aerosol, etc. Experiments involve droplets that are produced from flammable (oil) and non-flammable (water) components with significantly different thermophysical and optical properties, as well as boiling temperature and heat of vaporization. The most popular elements with the scientific community, such as ceramic, steel, aluminum, copper, and phosphorus rods, as well as a nichrome wire, serve as holders. We establish the roles of energy inflow from a holder to a droplet, and energy outflow in the opposite direction. We compare the holder results with a supporting thermocouple, recording the drop temperature under a heat transfer provided at 350°C. Finally, we forecast the conditions that are required for a significant improvement in the performance of thermal and flame water treatment through the explosive breakup of two-component droplets.

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Evaporation, boiling and explosive breakup of oil–water emulsion drops under intense radiant heating

Cited by 36 publications

References 23 publications

Dispersed phase structure and micro-explosion behavior under different schemes of water-fuel droplets heating

Dispersed phase structure and micro-explosion behavior under different schemes of water-fuel droplets heating

Atomization of Gel Fuels with Solid Particle Addition Utilizing an Air Atomizing Nozzle

Impact of Holder Materials on the Heating and Explosive Breakup of Two-Component Droplets

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