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雾化与喷雾

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ISSN 打印: 1044-5110

ISSN 在线: 1936-2684

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Indexed in

SIZE AND VELOCITY MEASUREMENTS IN SPRAYS AND PARTICLE-PRODUCING FLAME SPRAYS

卷 18, 册 7, 2008, pp. 619-644
DOI: 10.1615/AtomizSpr.v18.i7.20
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摘要

The liquid flame spray technique for nanoparticle production was investigated by in situ droplet and particle diagnostics with and without spray combustion in the presence or absence of zirconia particle precursor. In particular, the effect of atomization gas flow and liquid feed rates on spray characteristics and particle morphology was studied. Droplet size distributions were determined from submicron to supermicron range using phase Doppler anemometry (PDA, droplets >1 μm), scanning mobility particle sizer (droplets <1 μm), and electrical low-pressure impactor (whole droplet size range). The number mean droplet diameters were submicron, while the mass mean diameters were in the supermicron range. During spray combustion, droplet size distributions measured by PDA were affected by fast droplet evaporation and combustion such that an increasing atomization gas flow rate led to decreasing Sauter mean diameters. Average downstream gas velocities estimated by PDA decreased for increasing liquid feed and constant atomization gas flow. Also, particle production, that is, precursor feed to the flame, reduced the gas velocities. Zirconia product composition and morphology were determined by transmission electron microscopy and X-ray diffraction. High atomization gas flow rates resulted in complete precursor evaporation and produced zirconia particles of uniform size and shape.

对本文的引用
  1. Mäkelä Jyrki M., Aromaa Mikko, Teisala Hannu, Tuominen Mikko, Stepien Milena, Saarinen Jarkko J., Toivakka Martti, Kuusipalo Jurkka, Nanoparticle Deposition from Liquid Flame Spray onto Moving Roll-to-Roll Paperboard Material, Aerosol Science and Technology, 45, 7, 2011. Crossref

  2. Du Cong, Liu Jian-Zhong, Huang Zhen-Yu, Liu Lian-Sheng, Zhou Jun-Hu, Cen Ke-Fa, Fluctuation Characteristics of Spray Velocity Field of Coaxial Convergent Nozzle by Particle-Image-Velocimetry Measurements, Journal of Fluids Engineering, 134, 6, 2012. Crossref

  3. Aromaa Mikko, Arffman Anssi, Suhonen Heikki, Haapanen Janne, Keskinen Jorma, Honkanen Mari, Nikkanen Juha-Pekka, Levänen Erkki, Messing Maria E., Deppert Knut, Teisala Hannu, Tuominen Mikko, Kuusipalo Jurkka, Stepien Milena, Saarinen Jarkko J., Toivakka Martti, Mäkelä Jyrki M., Atmospheric synthesis of superhydrophobic TiO2 nanoparticle deposits in a single step using Liquid Flame Spray, Journal of Aerosol Science, 52, 2012. Crossref

  4. Aromaa Mikko, Pimenoff Joe A., Mäkelä Jyrki M., Liquid Flame Spray as a Means to Achieve Nanoscale Coatings with Easy-to-Clean Properties, in Self-Cleaning Materials and Surfaces, 2013. Crossref

  5. Haapanen J., Aromaa M., Teisala H., Tuominen M., Stepien M., Saarinen J.J., Heikkilä M., Toivakka M., Kuusipalo J., Mäkelä J.M., Binary TiO2/SiO2 nanoparticle coating for controlling the wetting properties of paperboard, Materials Chemistry and Physics, 149-150, 2015. Crossref

  6. Harra Juha, Kujanpää Sonja, Haapanen Janne, Juuti Paxton, Mäkelä Jyrki M., Hyvärinen Leo, Honkanen Mari, Aerosol analysis of residual and nanoparticle fractions from spray pyrolysis of poorly volatile precursors, AIChE Journal, 63, 3, 2017. Crossref

  7. Mäkelä JM, Aromaa M., Rostedt A., Krinke TJ, Janka K., Marjamäki M., Keskinen J., Liquid flame spray for generating metal and metal oxide nanoparticle test aerosol, Human & Experimental Toxicology, 28, 6-7, 2009. Crossref

  8. Harra Juha, Tuominen Mikko, Juuti Paxton, Rissler Jenny, Koivuluoto Heli, Haapanen Janne, Niemelä-Anttonen Henna, Stenroos Christian, Teisala Hannu, Lahti Johanna, Kuusipalo Jurkka, Vuoristo Petri, Mäkelä Jyrki M., Characteristics of nFOG, an aerosol-based wet thin film coating technique, Journal of Coatings Technology and Research, 15, 3, 2018. Crossref

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