Title: Effects of spray pressure, distance, angle and equivalent orifice diameter on spray uniformity for nano-pesticide application

Authors: Shougen Li; Yalan Jia; Yaxiong Wang; Feng Kang

Addresses: Beijing Institute of Petrochemical Technology, No. 19, Qingyuan North Road, Huangcun, Daxing District, Beijing, 102617, China ' Army Aviation Institute, No. 9 Taihu Street, Taihu Town, Tongzhou District, Beijing, 101116, China ' School of Technology, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, 100083, China ' School of Technology, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, 100083, China

Abstract: In the application process of nano-pesticides, toxicity of the active ingredients on ecological diversity has attracted great attention. Improving the spray uniformity is the important method to ensure the nano-pesticide benign usage. The relative span (RS) is difficult to characterise the uniformity of the liquid volume and the droplet size at different points in the atomisation field. Therefore, we propose new evaluation indices for the spray uniformity and further discuss the influence of different spray parameters on spray uniformity. The results showed that the equivalent orifice diameter, spray pressure, and distance had little effect on the uniformity of the liquid volume on the spray cross-section. The increase in the equivalent orifice diameter could improve the uniformity of the droplet size span. The increase in the spray pressure also reduced the uniformity of the droplet size span. In addition, this study has provided positive guidance for nozzle design and nano-pesticide application.

Keywords: PDPA; phase Doppler particle analyser; droplet size; liquid volume; spray parameters.

DOI: 10.1504/IJNT.2022.128987

International Journal of Nanotechnology, 2022 Vol.19 No.6/7/8/9/10/11, pp.1045 - 1057

Received: 30 Apr 2021
Accepted: 05 Oct 2021
Published online: 13 Feb 2023 *

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