|Table of Contents|

Experimental Study on the Impact of Droplets on the Surface of Soybean Leaves
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《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2018年06期
Page:
961-968
Research Field:
Publishing date:

Info

Title:
Experimental Study on the Impact of Droplets on the Surface of Soybean Leaves
Author(s):
CUI Ying-tao; QIN Chao-bin; ZHANG Zhi; LIU Dao-qi; DONG Hui-feng; ZHANG Kai-fei; LI He
（Electromechanic Engineering College,Henan Agricultural University,Zhengzhou 450002,China）
Keywords:
Droplet;  High speed camera;  We number;  Spread diameter
PACS:
-
DOI:
1011861/jissn1000-98412018060961
Abstract:
In order to improve the utilization rate of pesticides in soybean plant protection machinery, this paper analyzed the surface characteristics of soybean leaves, the biological characteristics of soybean leaves, measured the contact angle of droplets on the surface of soybean leaves, tested the adhesion of soybean leaf surface, and further utilized a high speed camera recorded the process by which a single droplet hited the soybean leaf The results showed that the dynamic pressure of the droplet impact caused the droplet to be embedded in the leaf surface structure, and the hairy structure could also penetrated and ruptured the droplet, which affected the breaking law of the droplet impact process With the increase of the droplet impact velocity and the droplet size of 225 mm, the diameter of the droplet spread increased firstly and then decreased When the impact velocity was 134 m·s-1, the impact number was 5557, the maximum spreading diameter was 394 mm When the impact velocity was ≥103 m·s-1, the droplets appeared to be broken and splashed As the impact velocity increased, the number of droplets breaks, splashes and bounces off the surface of the blade increased rapidly When the number was ＞3283, there were different degrees of crushing and splashing during the impact of the droplets When the impact number was ＜3283, the droplets did not break The particle size was changed As the particle size increased, the droplet spreading diameter increased When the droplet size was ＜219 mm, the droplet rebounds after hitting the surface of the blade When the droplet ≥219 mm, the droplet impact process had a rebound trend, but the impact of insufficient kinetic energy, high adhesion of the blade and other factors, the droplets did not bounce off the surface of the blade Therefore, the optimum value was obtained when the impact velocity was 134 m·s-1 and the particle diameter was 219 mm

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Last Update: 2018-12-05