Publicou 12 edições por ano
ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684
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EFFERVESCENT ATOMIZATION AT LOW MASS FLOW RATES. PART I: THE INFLUENCE OF SURFACE TENSION
RESUMO
An effervescent atomizer that operates at flow rates of 1.5 g/s and below is shown to produce sub-70-μm Sauter mean diameter sprays at pressures below 337 kPa (40 psig) while utilizing very small amounts of atomizing air (airliquid ratio by mass below 0.02). The mean drop sizes produced by this nozzle are found to be nearly independent of liquid viscosity for values ranging from 20 to 80 cP, while an increase in liquid surface tension from 30 to 67 dynes/cm serves to decrease mean drop size. Qualitative and quantitative descriptions of the data are obtained by modeling the atomization process as the formation of a number of ligaments at the exit orifice and their subsequent breakup using the classical analysis of Weber.
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