Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets

Shidong Xue; Jingkun Han; Xi Xi; Junyi Zhao; Zhong Lan; Rongfu Wen; Xuehu Ma

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Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets

Updated：2026-01-06

- Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets
- Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets
- 中国化学工程学报（英文版） 2022年46卷第6期页码：243-254
- Affiliations：
  
  Liaoning Key Laboratory of Clean Utilization of Chemical Resources, Institute of Chemical Engineering, School of Chemical Engineering, Dalian University of Technology,Dalian,China,116024
- Author bio：
- Funds：
- DOI：
  中图分类号：
- 纸质出版：2022
- Accepted：
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Shidong Xue, Jingkun Han, Xi Xi, 等. Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets[J]. 中国化学工程学报（英文版）, 2022,46(6):243-254.

Shidong Xue, Jingkun Han, Xi Xi, Junyi Zhao, Zhong Lan, Rongfu Wen, Xuehu Ma. Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets[J]. Chinese Journal of Chemical Engineering, 2022, 46(6): 243-254.
Shidong Xue, Jingkun Han, Xi Xi, 等. Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets[J]. 中国化学工程学报（英文版）, 2022,46(6):243-254. DOI：

Shidong Xue, Jingkun Han, Xi Xi, Junyi Zhao, Zhong Lan, Rongfu Wen, Xuehu Ma. Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets[J]. Chinese Journal of Chemical Engineering, 2022, 46(6): 243-254. DOI：

摘要

Abstract

The droplet velocity and diameter significantly affect both the spatial drift loss and the interfacial deposition behaviors

thus determining the ultimate utilization efficiency during pesticide spraying. Investigating the spatial velocity and diameter evolutions can reveal the mechanism of drift loss and guide to design regulation strategy. Here

we explored the spatial velocity distribution of droplets after leaving the nozzle by particle image velocimetry technology and particle tracking model

considering that the effect of nozzle configuration and the air velocity. It shows that all droplets decelerate rapidly with the velocity attenuation ratio ranging from 50% to 80% within the region of 200 mm below the nozzle. The spatial velocity evolution differences between droplets in crossflow are determined by the competition of vertical drag force and net gravity

and the drag force sharply increases as the droplet diameter decreases

especially for that smaller than 150 μm. Based on the spatial evolution differences of the droplet velocity and diameter

a functional adjuvant was added to the liquid for improving the diameter distribution. And the drift loss was significantly reduced due to the reduction of the proportion of easily drifting droplets.

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