Publicou 12 edições por ano
ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684
Indexed in
EXPERIMENTS ON AIR-BLAST ATOMIZATION OF VISCOELASTIC LIQUIDS, PART 1: QUIESCENT CONDITIONS
RESUMO
Motivated by the need to improve spray coating, an experimental investigation into viscoelastic atomization using preformulated model test liquids is presented. These test liquids had similar values of surface tension, density, and rate-independent shear viscosity, but varying extensional viscosity. Through the use of these test liquids, the effects of elasticity were systematically isolated and found to act against the breakup of a spray issuing from a plain-jet air-blast atomizer. Flash photography revealed large-scale filamentary structures at breakup, which delayed discrete droplet formation until farther downstream, where relative air-liquid velocities were reduced. The lower relative velocities near breakup produced an increase in the volumetric median diameter, as was confirmed by analysis of high-magnification shadowgraphs. The hindering influence of elasticity on atomization was further substantiated through particle image velocimetry measurements, which indicated that the elastic droplets, owing to their greater inertia, were better able to maintain their initial momentum.
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Keshavarz B., Green S. I., Eadie D. T., Elastic liquid jet impaction on a high-speed moving surface, AIChE Journal, 58, 11, 2012. Crossref
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Qian Lijuan, Lin Jianzhong, Bao Fubing, Numerical Models for Viscoelastic Liquid Atomization Spray, Energies, 9, 12, 2016. Crossref
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Fu Qingfei, Ge Fei, Wang Wenda, Yang Lijun, Spray characteristics of gel propellants in an open-end swirl injector, Fuel, 254, 2019. Crossref
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Wachter Simon, Jakobs Tobias, Kolb Thomas, Experimental investigation on the influence of system pressure on resulting spray quality and jet breakup applying pressure adapted twin-fluid nozzles, International Journal of Multiphase Flow, 125, 2020. Crossref
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Wachter Simon, Jakobs Tobias, Kolb Thomas, Effect of Solid Particles on Droplet Size Applying the Time-Shift Method for Spray Investigation, Applied Sciences, 10, 21, 2020. Crossref
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Wachter Simon, Jakobs Tobias, Kolb Thomas, Comparison of Central Jet and Annular Sheet Atomizers at Identical Gas Momentum Flows, Industrial & Engineering Chemistry Research, 60, 30, 2021. Crossref
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Wachter Simon, Jakobs Tobias, Kolb Thomas, Mass Flow Scaling of Gas-Assisted Coaxial Atomizers, Applied Sciences, 12, 4, 2022. Crossref