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Atomization and Sprays
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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2015011488
pages 301-317

THE INFLUENCE OF DESIGN PARAMETERS ON THE INITIAL SPRAY CHARACTERISTICS OF THE HIGH-PRESSURE AIR INCLUSION NOZZLE

Geng Bai
Graduate School of Science and Technology, Niigata University, Ikarashi 2-8050 Nishi-ku, Niigata 950-2181, Japan
Kazuhiro Nakano
Graduate School of Science and Technology, Niigata University, Ikarashi 2-8050 Nishi-ku, Niigata 950-2181, Japan
Shintaroh Ohashi
Faculty of Agriculture, Niigata University, Ikarashi 2-8050 Nishi-ku, Niigata 950-2181, Japan
Tomomichi Mizukami
Bio-oriented Technology Research Advancement Institution, 1-40-2 Nisshin, Kita-ku, Saitama 331-8537, Japan
Haijun Yan
College of Water Resources and Civil Engineering, China Agricultural University, No. 17 Tsinghua East Road, Beijing 100083, China
Somsak Kramchote
Graduate School of Science and Technology, Niigata University, Ikarashi 2-8050 Nishi-ku, Niigata 950-2181, Japan; Division of Postharvest Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangmod, Thungkru, Bangkok 10140, Thailand

ABSTRAKT

Flat-fan air inclusion nozzles, usually with a high-pressure range of 1−1.5 MPa, have been widely used as one of the best drift control methods on agricultural boom sprayers in Japan. To get a better understanding of the relationship between the nozzle design parameters (pre-orifice diameter and final orifice area) and the initial spray characteristics (droplet size characteristics, spray angle, liquid flow rate, and included air within droplets), the influence of the above parameters of the KIRINASHIES series nozzles on the initial spray characteristics was investigated under different nozzle pressures. The results show that the pre-orifice diameter, final orifice area, and nozzle pressure significantly affect the volume median diameter (Dv0.5). In addition, the nozzle pressure and the pre-orifice diameter had positive correlations with the spray angle while the pre-orifice diameter and the final orifice area significantly influenced the spray liquid density which can indicate the quantity of included air within droplets. The corresponding multivariate regression analysis was carried out and relatively high values of the coefficient of determinations (R2) were obtained between several nozzle parameters and the Dvo.5, and also the spray liquid density and the liquid flow rate.


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