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Atomization and Sprays
Импакт фактор: 1.262 5-летний Импакт фактор: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684

Выпуски:
Том 29, 2019 Том 28, 2018 Том 27, 2017 Том 26, 2016 Том 25, 2015 Том 24, 2014 Том 23, 2013 Том 22, 2012 Том 21, 2011 Том 20, 2010 Том 19, 2009 Том 18, 2008 Том 17, 2007 Том 16, 2006 Том 15, 2005 Том 14, 2004 Том 13, 2003 Том 12, 2002 Том 11, 2001 Том 10, 2000 Том 9, 1999 Том 8, 1998 Том 7, 1997 Том 6, 1996 Том 5, 1995 Том 4, 1994 Том 3, 1993 Том 2, 1992 Том 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v20.i3.40
pages 227-239

CONTROLLING DROPLET-SIZE DISTRIBUTION USING OIL EMULSIONS IN AGRICULTURAL SPRAYS

Kuide Qin
Crop Protection Research & Development, Dow AgroSciences LLC, USA
Holger Tank
Crop Protection Research & Development, Dow AgroSciences LLC, 9330 Zionsville Road, Indianapolis, Indiana 46268, USA
S. A. Wilson
Crop Protection Research & Development, Dow AgroSciences LLC, 9330 Zionsville Road, Indianapolis, Indiana 46268, USA; and Mechanical Power Department, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt
Brandon Downer
Crop Protection Research & Development, Dow AgroSciences LLC, 9330 Zionsville Road, Indianapolis, Indiana 46268, USA
Lei Liu
Crop Protection Research & Development, Dow AgroSciences LLC, 9330 Zionsville Road, Indianapolis, Indiana 46268, USA

Краткое описание

A typical agricultural chemical spray process involves atomizing a liquid stream of diluted pesticide solution through hydraulic spray nozzles that inherently produce a wide spectrum of spray droplet sizes. Finer droplets have higher potential of off-target movement or drift, which is of concern due to their potential impacts on neighboring crops and livestock, sensitive ecological resources, and human health. Research by the Spray Drift Task Force and others has demonstrated that although spray nozzle selection and application parameters are the key factors to produce the desired droplet size spectrum, the physical properties of the spray solution have significant effects on the droplet size distribution for various kinds of nozzles. One of these properties of many spray fluids is the inclusion of an oil phase in the form of emulsions. The effect of oil-in-water emulsions on spray droplet size distribution has been demonstrated by previous work. However, the mechanisms of this effect are largely unknown. In this study, a model system of polyvinyl alcohol emulsified methylated soybean oil in water was created in a series of spray solutions. The effects of emulsion particle size, dynamic surface tension, and oil phase viscosity were studied systematically, and atomization mechanism hypotheses were proposed. It was proposed that the shear rate provided by the spray process can deform and elongate the emulsion droplets inside the nozzle but may not be sufficient to break them. The elongated emulsion droplets then recover when the spray jet sheet exits the nozzle, which presents localized oscillation frequency irregularities and causes perforation and early breakup of the jet sheet. This study will help in the design of agricultural spray nozzles and the optimization of antidrift spray additives.


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EXPERIMENTAL INVESTIGATION ON NEAR-FIELD BREAKUP CHARACTERISTICS OF HYBRID-MIXED TWIN-FLUID ATOMIZER
Atomization and Sprays, Vol.28, 2018, issue 10
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DEVELOPMENT OF AN AIR-BLAST ATOMIZER FOR INDEPENDENT CONTROL OF DROPLET SIZE AND SPRAY DENSITY
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C. P. Koshland, R. F. Sawyer, H. L. Clack, D. Lucas
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ULTRASONIC ATOMIZATION OF ALKANES AND ALCOHOLS
Atomization and Sprays, Vol.27, 2017, issue 10
Javier Alconchel, Esteban Calvo, José L. Santolaya, Antonio Lozano, Felix Barreras, Juan Antonio Garcia
MECHANISMS, EXPERIMENT, AND THEORY OF LIQUID SHEET BREAKUP AND DROP SIZE FROM AGRICULTURAL NOZZLES
Atomization and Sprays, Vol.24, 2014, issue 8
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