Design and Experiment of Dual Flexible Air Duct Spraying Device for Orchards

Zhang, Zhu; Wang, Dongxuan; Li, Jianping; Wang, Peng; Guo, Yuankai; Tian, Sibo

doi:10.3390/agriculture15101031

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Open AccessArticle

Design and Experiment of Dual Flexible Air Duct Spraying Device for Orchards

by

Zhu Zhang

¹

,

Dongxuan Wang

²,

Jianping Li

^1,3,*

,

Peng Wang

¹,

Yuankai Guo

¹ and

Sibo Tian

¹

College of Mechanical and Electrical Engineering, Hebei Agricultural University, Baoding 071000, China

²

College of Science and Technology, Hebei Agricultural University, Huanghua 061100, China

³

Hebei Province Smart Agriculture Equipment Technology Innovation Center, Baoding 071001, China

^*

Author to whom correspondence should be addressed.

Agriculture 2025, 15(10), 1031; https://doi.org/10.3390/agriculture15101031

Submission received: 14 April 2025 / Revised: 8 May 2025 / Accepted: 8 May 2025 / Published: 9 May 2025

(This article belongs to the Section Agricultural Technology)

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Abstract

To address uneven airflow distribution and pesticide deposition coverage in orchard pesticide application, we developed a double-flexible duct spraying device. Utilizing FLUENT 2022 software for airflow field simulation, we analyzed various structural parameters to identify optimal configurations for the air duct type, diameter, and nozzle outlet diameter. The results indicated that the nozzle outlet diameter most significantly influences wind field uniformity, followed by the air duct diameter and type. The optimal settings were identified as follows: C-Type air duct, 100 mm duct diameter, and 50 mm nozzle outlet diameter. Validation tests confirmed these settings, with simulated and actual wind speed measurements, showing no more than a 10% relative error, affirming the simulation’s accuracy. Field tests demonstrated an average droplet density of 35.38 droplets/cm² within tree canopies, indicating strong penetration ability. Droplet distribution followed a lower > middle > upper pattern in the canopy’s vertical direction, fulfilling technical requirements for high spindle-shaped fruit trees and providing a foundation for achieving a uniform canopy coverage.

Keywords: orchard; sprayer; air pipe; optimization test

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MDPI and ACS Style

Zhang, Z.; Wang, D.; Li, J.; Wang, P.; Guo, Y.; Tian, S. Design and Experiment of Dual Flexible Air Duct Spraying Device for Orchards. Agriculture 2025, 15, 1031. https://doi.org/10.3390/agriculture15101031

AMA Style

Zhang Z, Wang D, Li J, Wang P, Guo Y, Tian S. Design and Experiment of Dual Flexible Air Duct Spraying Device for Orchards. Agriculture. 2025; 15(10):1031. https://doi.org/10.3390/agriculture15101031

Chicago/Turabian Style

Zhang, Zhu, Dongxuan Wang, Jianping Li, Peng Wang, Yuankai Guo, and Sibo Tian. 2025. "Design and Experiment of Dual Flexible Air Duct Spraying Device for Orchards" Agriculture 15, no. 10: 1031. https://doi.org/10.3390/agriculture15101031

APA Style

Zhang, Z., Wang, D., Li, J., Wang, P., Guo, Y., & Tian, S. (2025). Design and Experiment of Dual Flexible Air Duct Spraying Device for Orchards. Agriculture, 15(10), 1031. https://doi.org/10.3390/agriculture15101031

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Design and Experiment of Dual Flexible Air Duct Spraying Device for Orchards

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