Search results for "Spray characteristics"

showing 3 items of 3 documents

Analysis of Dissolved-Gas Atomization: Supercritical CO2 Dissolved in Water

2010

Supercritical dissolved-gas atomization is an atomization process in which carbon dioxide at temperature and pressure above its critical point is used as the atomizing gas. The spray characteristics in terms of droplets size and distribution have been experimentally studied using a laser diffraction method based on a Malvern apparatus. The main parameter that influences the droplets size is the gas-to-liquid mass ratio (GLR); the injection pressure in the range of 7.4-13 MPa has a minor effect. Upon variation of the GLR from 0.5 to 3, the droplet mean diameter changes from about 8.0 to 2.0 μm; very narrow droplet size distributions are also produced. From the point of view of the atomizatio…

DiffractionSpray characteristicsChemistryGeneral Chemical EngineeringAnalytical chemistrycarbon dioxideGeneral Chemistrysupercritical fluidsLaserIndustrial and Manufacturing EngineeringSupercritical fluidAtomizationlaw.inventionPhysics::Fluid Dynamicschemistry.chemical_compoundsprayCritical point (thermodynamics)lawCarbon dioxidePhysics::Atomic and Molecular ClustersInjection pressureDroplet sizeIndustrial & Engineering Chemistry Research
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Use of supercritical CO2 and N2 as dissolved gases for the atomization of ethanol and water

2012

Supercritical dissolved gas atomization (SDGA) is an atomization process in which a gas at temperatures and pressures above the critical point is used as the atomizing medium. The concept of SDGA has been applied mainly using CO 2 as atomizing gas in various processes developed for the production of fine particles of pharmaceuticals, polymers, and chemical products and for the atomization of fuels. In this work, SDGA, using ethanol and water as the liquids to be atomized, has been experimentally studied. The spray characteristics, in terms of droplet size and distribution, have been investigated using a laser diffraction analyzer. Ethanol has been chosen due to the large miscibility with CO…

Spray characteristicsGeneral Chemical EngineeringAnalytical chemistryMiscibilityLaser diffractionIndustrial and Manufacturing EngineeringPhysics::Fluid DynamicsGas to liquidschemistry.chemical_compoundAtomizing gas Dissolved gas Droplet sizes Fine particles Gas to liquids Laser diffraction Supercritical fluids Supercritical CO2Fine particlesCritical point (thermodynamics)Gas to liquidsPhysics::Atomic and Molecular ClustersChemical Engineering (all)Physics::Atomic PhysicsDissolved gasCondensed Matter::Quantum Gaseschemistry.chemical_classificationAtomizing gasSupercritical fluidsChemistry (all)Droplet sizesGeneral ChemistryPolymerSupercritical CO2Supercritical fluidCondensed Matter::Soft Condensed MatterSolventchemistryCarbon dioxide
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Yttria-stabilized zirconia in-flight particle characteristics under vacuum plasma spray conditions

2009

This paper deals with the diagnostic yttria-stabilized zirconia (YSZ) in-flight particles in Vacuum Plasma Spray (VPS) process using an optical measurement device. Particle velocity, temperature and diameter were correlated to spray distance under a fixed chamber pressure of about 14 kPa. Experiments were carried out with a two-color pyrometer. Results show that correlations can be satisfactory described with linear relationships. Particle velocity and temperature decrease when increasing spray distance whereas particle diameter exhibits a linear increase with the spray distance.

Spray characteristicsMaterials sciencePhysics::Instrumentation and DetectorsAnalytical chemistryCondensed Matter PhysicsSurfaces Coatings and Filmslaw.inventionChamber pressureSpray nozzlelawParticleParticle velocityThermal sprayingInstrumentationYttria-stabilized zirconiaPyrometerVacuum
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