Chen Jian, Hu Wei, Dong Xiaoya, Lin Jinlong, Gao Zhouming, Qiu Baijing
School of Agricultural Engineering, Jiangsu University, Zhenjiang, China.
Key Laboratory of Plant Protection Equipment, Ministry of Agriculture and Rural Affairs, Jiangsu University, Zhenjiang, China.
Front Plant Sci. 2024 Dec 5;15:1470745. doi: 10.3389/fpls.2024.1470745. eCollection 2024.
The spinning disc atomizer is extensively utilized in agricultural spraying, with optimized operating conditions significantly enhancing atomization performance. In this paper, the atomization characteristics of a spinning disc were studied using photographs taken by a high-speed camera. Ethanol-water solutions were used at various flow rates and the disc speed was varied in a wide range. The influence of disc speed, flow rate, and surface tension on modes of spray formation, droplet size, and size distribution were investigated. The correlations for Reynolds number (), Stability number (), and dimensionless droplet size ( ) were proposed in a wide range of operational conditions. The Rosin-Rammler (RR) and modified Rosin-Rammler (MRR) distributions appropriately represented the droplet size distribution. It was found that the increase in flow rate resulted in modes of spray formation translation under the same disc speed and ethanol-water solution. The predicted droplet sizes showed good agreement with the experiment values. Most of the predicted droplet sizes were within the band of ±15% of the experiment values. The droplet size decreased with increasing or , but was hardly affected by . Besides, the droplet size decreased with increasing disc speed and decreasing surface tension. The RR and MRR distribution matched with the calculated cumulative volume fraction from the experimental data reasonably well for the entire range. It was recommended to appropriately elevate during the spinning disc atomization process to narrow the range of droplet sizes and enhance uniformity.
旋转盘式雾化器在农业喷雾中得到广泛应用，优化的操作条件能显著提高雾化性能。本文利用高速摄像机拍摄的照片研究了旋转盘的雾化特性。使用了不同流速的乙醇 - 水溶液，并在较宽范围内改变盘速。研究了盘速、流速和表面张力对喷雾形成模式、液滴尺寸和尺寸分布的影响。在广泛的操作条件下提出了雷诺数（）、稳定性数（）和无量纲液滴尺寸（）的相关性。罗辛 - 拉姆勒（RR）分布和修正的罗辛 - 拉姆勒（MRR）分布能恰当地表示液滴尺寸分布。发现在相同的盘速和乙醇 - 水溶液条件下，流速的增加会导致喷雾形成模式发生转变。预测的液滴尺寸与实验值吻合良好。大多数预测的液滴尺寸在实验值的±15%范围内。液滴尺寸随或的增加而减小，但几乎不受的影响。此外，液滴尺寸随盘速的增加和表面张力的降低而减小。RR和MRR分布在整个范围内与根据实验数据计算的累积体积分数合理匹配。建议在旋转盘雾化过程中适当提高，以缩小液滴尺寸范围并提高均匀性。
