摘要
为了探究极飞P20离心喷嘴的喷雾特性,文章对其喷嘴进行了测试。通过单因素实验法,测得流量、转速、喷洒高度对喷幅的影响规律;在不同的风速下,测得流量、转速、喷嘴距激光的垂直高度和喷嘴距激光的水平距离对雾滴粒径的影响规律;在不同的风速下,结合水敏纸进行试验,测得喷嘴的雾滴沉积量的分布。结果表明流量的增大会导致喷幅增大;转速增大,喷幅在一个范围内波动;高度的增大会导致喷幅变小。在无风的条件下,流量以及高度的增加,对雾滴粒径的大小没有显著影响;转速的增大会使得雾滴粒径减小;喷嘴与激光的水平距离的增大,雾滴粒径整体数值也随着增大。在有风的条件下,随着风速的增大,雾滴粒径略微减小,并且同区域内雾滴沉积量也随着风速的增大而减小。本试验为进行无人机喷雾时的喷头所采用的参数值提供了数据支持,便于对喷头进一步优化。
In order to research on spray characteristics of the P20 centrifugal nozzle, the nozzle was tested in this article. Through single factor experiment method, firstly, the influence of flow rate, rotational speed and spraying height on spraying amplitude was measured. Secondly, under different wind speeds, the influence of flow rates, rotational speed, vertical height of nozzle to laser and horizontal distance of nozzle to laser on droplet size was measured. Finally, the distribution of droplet deposition in nozzles was measured by combining with water sensitive paper at different wind speeds. The results showed that the increase of the flow rate caused the spray amplitude to increase, the increase of the rotational speed caused the spray amplitude to fluctuate within a range and the increase of the height caused the spray amplitude to decrease. In the absence of wind, the flow rate and height increase had no significant effect on the size of the droplet size, the increase of the rotational speed caused the droplet size to decrease and the increase of the horizontal distance between the nozzle and the laser caused the overall value of the droplet size to increase. Under the condition of wind, the increase of wind speed caused the droplet size to decrease slightly. The amount of droplet deposition also decreased as the wind speed increased in the same region. This experiment provided data support for parameter values of nozzle during UAV spray and was convenient for further optimization of nozzle.
作者
张建桃
谢伟坤
周腾媛
尹选春
兰玉彬
文晟
Zhang Jiantao;Xie Weikun;Zhou Tengyuan;Yin Xuanchun;Lan Yubin;Wensheng(School of Mathematics and Information,South China Agricultural University,Guangdong Guangzhou 510000)
基金
广州市科学技术协会科普项目(K2019010201039)
国家重点研发计划资助项目(2017YFD0701001)
国家自然科学基金项目(6177020045)
关键词
喷头
雾滴粒径
风洞
雾滴谱相对宽度
nozzles
droplet size
wind tunnel
relative width of droplet spectrum
