农业机械学报2024，Vol.55Issue(2)：188-201,14.DOI:10.6041/j.issn.1000-1298.2024.02.018
液滴在柔性辣椒叶片表面撞击行为研究
Impact Behavior of Droplets on Surface of Flexible Chili Leaves
摘要
Abstract
Droplets will cause the blade to bend and deform when impacting the blade,and this deformation will affect the droplet impact behavior.Based on the previous theoretical model of droplet impact on rigid surfaces,the influence of blade elasticity coefficient on droplet impact behavior when droplet impacted on flexible chili blades was investigated,and the mathematical prediction model of the maximum diffusion factor of droplet impact on flexible chili leaves was established by taking into account the elastic potential energy of blades,and the gravitational potential energy of droplets and blades.The reasonableness of the mathematical model was verified with droplet particle size,impact velocity,and the percentage of the distance from the impact point to the leaf tip as experimental variables.The results showed that all three factors had a significant effect on droplet adhesion and splashing(P＜0.05).The prediction error of the mathematical model for the maximum diffusion factor of droplet impact on flexible chili leaves was within 10％.When the droplet impacted the flexible chili blade without rebound consistent with theoretical model predictions and the droplet adheres,the size of the blade's elastic coefficient was negatively correlated with the time for the droplet to reach the maximum diffusion,and compared with the impact on the rigid fixed blade,the increase in time to reach the maximum diffusion was within 0.5 ms,and the reduction rate of the maximum diffusion factor was within 25％,and the ratio of elastic potential energy to the total initial energy transferred to the blade showed a trend of decreasing and then increasing with the increase in the blade elasticity coefficient,which showed a tendency to decrease first and then increase.When the droplet splashed at 20％,40％,60％,80％of the distance to the leaf tip,the splash critical value Kcrit was increased by 16.202％,10.515％,6.508％,4.467％,respectively,compared with the splash value of the rigid blade,which indicated that the closer the leaf was to the region where the blade elasticity coefficient was small,the droplet would be less likely to splash.The research result can provide a method for the study of droplet impact behavior on flexible plant leaves and spray parameter selection.关键词
柔性辣椒叶片/弹性系数/撞击行为/最大扩散因子/液滴反弹预测/飞溅临界值Key words
flexible chili leaves/elastic coefficient/impact behavior/maximum diffusion factor/droplet bounce prediction/splash boundary value分类
农业科技引用本文复制引用
王松,赵笑缘,郜周明,朱翠翠,董梁,邱白晶..液滴在柔性辣椒叶片表面撞击行为研究[J].农业机械学报,2024,55(2):188-201,14.基金项目
国家自然科学基金项目(31971790) （31971790）
