Spraying performance of umbrella wind-field-type atomization and its application to parameter optimization

文献类型： 外文期刊

第一作者： Li, Shaobo

作者： Li, Shaobo;Li, Jianping;Yu, Shaomeng;Wang, Pengfei;Liu, Hongjie;Yang, Xin;Zhang, Ruirui;Li, Jianping

作者机构：

关键词： anti-drift device; umbrella wind field; droplet deposit; airflow velocity; spray drift; wind tunnel

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.1； 五年影响因子：4.4 ）

ISSN： 1526-498X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： BACKGROUND We designed an umbrella wind-field-type anti-drift spraying device to improve droplet deposit in the fruit tree canopy, reduce spray drift between fruit tree rows, and avoid uneven droplet deposit in the canopy.RESULTS We used Computational Fluid Dynamics combined with wind field tests to optimize the parameters of the anti-drift spray device, and the results showed that airflow velocity at the outlet of the device after optimization was 24.5 m s(-1), which is 48% higher than that before optimization (16.5 m s(-1)) airflow velocity. We designed wind tunnel tests and field tests to analyze the anti-drift characteristics of the anti-drift spraying device. Wind tunnel test results showed that the side airflow velocity, outlet diameter, spray distance, and spray drift ratio were correlated. The mathematical models established by vertical and horizontal multifactor orthogonal tests were significant (P < 0.05, R-2 0.947, 0.878, respectively). The results of the field tests showed that side airflow, velocity spray pressure and outlet diameter had significant effects on the droplet deposit characteristics (in descending order: the side airflow velocity, spray pressure, and outlet diameter). The maximum droplet deposit was 6.34 mu L cm(-2) when the side airflow velocity was 2 m s(-1), the spray pressure was 0.4 MPa, and the outlet diameter was 70 mm(2). When the side airflow velocity exceeded 2 m s(-1), the outlet diameter and spray pressure had to be reduced to ensure better droplet deposit.CONCLUSION The results indicated that the umbrella wind field could reduce spray drift and ineffective deposit in off-target areas and provides a reference for the comprehensive analysis of the spray drift deposit law.

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