茶树叶片表面喷雾液滴斜撞击行为研究

在喷雾场景中,茶树叶片具有不同倾斜方向,且会受到不同方向喷雾液滴的撞击。为掌握液滴斜撞击茶树叶片时的撞击行为及影响机理,提出了利用椭圆铺展面积来衡量斜撞击时液滴的铺展变化,并推导出包含叶片倾角和撞击角的斜撞击液滴铺展及反弹数学预测模型。为验证理论准确性,利用两台高速摄像机对喷雾液滴撞击茶树叶片的撞击过程及结果进行测试和分析。研究结果表明,撞击角、初始直径、撞击速度对粘附液滴的铺展面积影响由大到小为撞击速度、初始直径、撞击角,其中初始直径及撞击速度对液滴铺展面积有显著性影响,且是极强正相关。对于细、中液滴,撞击角对铺展面积无显著性影响;对于粗大液滴,撞击角有显著性影响,建议采用90°撞击角。

In spray scenarios, tea tree leaves exhibit varying inclination angles and are subjected to impacts from spray droplets in different directions. To clarify the impact behavior and influencing mechanism of droplets obliquely impacting tea tree leaves, we propose using the elliptical spreading area to quantify the spreading variation of obliquely impacting droplets, and derive a mathematical prediction model for the spreading and rebound of such obliquely impacting droplets that incorporates both leaf inclination angle and impact angle. To validate the accuracy of this theoretical model, we conducted tests and analysis on the impact process and outcomes of spray droplets impacting tea tree leaves using two high-speed cameras. The research results indicate that the order of influence of impact angle, initial diameter, and impact velocity on the spreading area of adhered droplets, from most significant to least, is impact velocity, initial diameter, and impact angle. Among these factors, both initial diameter and impact velocity exert significant effects on the droplet spreading area, and demonstrate an extremely strong positive correlation. For fine and medium-sized droplets, the impact angle has no significant effect on the spreading area; for coarse and large droplets, the impact angle has a significant effect, and a 90° impact angle is recommended.

搜集汇总

背景与挑战

背景概述

该数据集研究喷雾液滴斜撞击茶树叶片表面的行为，通过建立数学预测模型并结合高速摄像实验，分析了撞击角、初始直径和撞击速度对液滴铺展面积的影响。研究发现撞击速度与初始直径对铺展面积有显著正相关性，而撞击角的影响则因液滴尺寸而异。