Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Spray and Atomization Characteristics of an Agricultural Nozzle by Changing the Injection Pressures

분사 압력 변화에 따른 농업용 노즐의 분무 및 미립화 특성

  • 상몽소 (전남대학교 일반대학원 기계공학과) ;
  • 박수한 (건국대학교 기계항공공학부)
  • Received : 2021.10.12
  • Accepted : 2021.11.10
  • Published : 2021.12.31
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Abstract

Spray drift of agricultural nozzles has become a big issue because it causes low precision targeting and environmental pollution. In order to reduce the spray drift, study spray characteristics of agricultural nozzles is virtually important. In this study, shadowgraph and Mie-scattering visualization techniques were used to study the macroscopic spray and atomization characteristics of an agricultural nozzle. PDPA was used to measure the atomization characteristics of spray. The injection pressure is set to 1 bar, 3 bar and 5 bar, which covers the working range of the nozzle. For the PDPA experiment, 75 points were measured in an area of 160 mm × 120 mm at 10 mm intervals directly below the nozzle to grasp the overall atomization characteristics of the spray. It was found that the spray width and sheet width showed a linear correlation. As the injection pressure increased, the sheet expansion in the 0-degree direction and the sheet swing in the 90-degree direction jointly promoted the breakup of the sheet. In addition, the area close to the central axis had a large droplet velocity, and since a large droplet velocity promoted atomization of spray, the area close to the central axis had a smaller spray droplet diameter than the left and right regions.

Keywords

Acknowledgement

이 연구는 한국연구재단 중견연구자지원사업(2019R1A2C1089494)과 광주산학융합원의 지원으로 수행되었습니다. 지원 기관에 감사드립니다.

References

  1. S. Reichenberger, M. Bach, A. Skitschak and H.G. Frede, "Mitigation strategies to reduce pesticide inputs into ground- and surface water and their effectiveness; a review," Sci Total Environ, Vol. 384, No. 1, 2007, pp. 1~35. https://doi.org/10.1016/j.scitotenv.2007.04.046
  2. H. Chen, B. K Fritz, Y. Lan, Z. Zhou and J. Zheng, "Overview of spray nozzles for plant protection from manned aircrafts: Present research and prospective," International Journal of Precision Agricultural Aviation, Vol. 1, No. 1, 2018, pp. 1~12.
  3. A. P. Reimer and L. S. Prokopy, "Environmental attitudes and drift reduction behavior among commercial pesticide applicators in a U.S. agricultural landscape," J Environ Manage, Vol. 113, 2012, pp. 361~369. https://doi.org/10.1016/j.jenvman.2012.09.009
  4. "The Plant Protection Products (Sustainable Use) Regulations 2012" https://www.legislation.gov.uk/uksi/2012/1657/pdfs/uksi_20121657_en.pdf.
  5. "Reducing Pesticide Drift," https://www.epa.gov/reducing-pesticide-drift/introduction-pesticide-drift.
  6. "농약허용기준 강화제도(PLS)," https://www.mafra.go.kr/PLS.
  7. "Spray Drift of Pesticides," https://extensionpubs.unl.edu/publication/9000016365044/spray-drift-of-pesticides/.
  8. J. Wang, Y. Lan, H. Zhang, Y. Zhang, S. Wen, W. Yao and J. Deng, "Drift and deposition of pesticide applied by UAV on pineapple plants under different meteorological conditions," International Journal of Agricultural and Biological Engineering, Vol. 11, No. 6, 2018, pp. 5~12. https://doi.org/10.25165/j.ijabe.20181106.4038
  9. T. R. Butts, C. A. Samples, L. X. Franca, D. M. Dodds, D. B. Reynolds, J. W. Adams, R. K. Zollinger, K. A. Howatt, B. K. Fritz, W. Clint Hoffmann and G. R. Kruger, "Spray droplet size and carrier volume effect on dicamba and glufosinate efficacy," Pest Manag Sci, Vol. 74, No. 9, 2018, pp. 2020~2029. https://doi.org/10.1002/ps.4913
  10. K. Lee, Y. Yoon and K. Ahn, "Experimental Study on the Spray Characteristics of Aerated Impinging Jets," Journal of Ilass-korea, Vol. 24, No. 4, 2019, pp. 185~193. https://doi.org/10.15435/JILASSKR.2019.24.4.185
  11. B. K. Fritz, W. C. Hoffmann, W. E. Bagley, G. R. Kruger, Z. Czaczyk and R. S. Henry. "Measuring Droplet Size of Agricultural Spray Nozzles-Measurement Distance and Airspeed Effects," Atomization and Sprays, Vol. 24, No. 9, 2014, pp. 747~760. https://doi.org/10.1615/AtomizSpr.2014008424
  12. N. De Cock, M. Massinon, D. Nuyttens, D. Dekeyser and F. Lebeau, "Measurements of reference ISO nozzles by high-speed imaging," Crop Protection, Vol. 89, 2016, pp. 105~115. https://doi.org/10.1016/j.cropro.2016.07.016
  13. G. Tian, H. Li, H. Xu, Y. Li and S. M. Raj, "Spray Characteristics Study of DMF Using Phase Doppler Particle Analyzer," SAE International Journal of Passenger Cars - Mechanical Systems, Vol. 3, No. 1, 2010, pp. 948~958. https://doi.org/10.4271/2010-01-1505
  14. G. Wigley, M. Goodwin, G. Pitcher and D. Blondel, "Imaging and PDA analysis of a GDI spray in the near-nozzle region," Experiments in Fluids, Vol. 36, No. 4, 2004, pp. 565~574. https://doi.org/10.1007/s00348-003-0690-1
  15. A. Altieri, S. Cryer and L. Acharya, "Mechanisms, experiment, and theory of liquid sheet breakup and drop size from agricultural nozzles," Atomization and Sprays, Vol. 24, No. 8, 2014, pp. 695~721. https://doi.org/10.1615/AtomizSpr.2014008779
  16. G. J. Dorr, A. J. Hewitt, S. W. Adkins, J. Hanan, H. Zhang and B. Noller, "A comparison of initial spray characteristics produced by agricultural nozzles," Crop Protection, Vol.53, 2013, pp. 109~117. https://doi.org/10.1016/j.cropro.2013.06.017
  17. C. Gong, C. Kang, W. Jia, W. Yang and Y. Wang, "The effect of spray structure of oil-based emulsion spray on the droplet characteristics," Biosystems Engineering, Vol. 198, 2020, pp. 78~90. https://doi.org/10.1016/j.biosystemseng.2020.08.001
  18. S. A. Cryer, A. L. Altieri, A. L. Schmucker and K. M. Day, "Minimising atomisation drift potential by exploring the break-up of liquid sheets using multiphase methylated soybean and silicon oil emulsions," Biosystems Engineering, Vol. 202, 2021, pp. 142~151. https://doi.org/10.1016/j.biosystemseng.2020.12.004