应用于无人机的新型多离心喷管喷射特性评价

IF 7.7 1区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY

Computers and Electronics in Agriculture Pub Date : 2025-06-26 DOI:10.1016/j.compag.2025.110712

Shaoqing Xu , Ye Jin , Yuan Zhong , Luna Luo , Jianli Song

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引用次数: 0

摘要

植保无人机（uav）近年来在果树植保中得到了广泛的应用，特别是在丘陵和山区的应用场景。无人机满足柑橘红蜘蛛控制要求的能力是无人机制造商、农业服务组织和柑橘种植者当前关注的问题。在本研究中，对具有多个离心喷嘴的无人机进行了测试。喷嘴有两个雾化器，内雾化器(P)和外雾化器(C)，可实现多液滴雾化。首先，对喷嘴的液滴破碎特性和液滴尺寸进行了测量。利用高速摄像机研究液滴破碎特性。将雾化过程分为三个阶段：由P旋转触发的第一次雾化，由C撞击引起的第二次雾化，以及喷嘴周围小液滴的碰撞团聚。液滴尺寸测试结果表明，液滴尺寸与P的转速成反比。通过调节喷嘴P和c的转速，液滴的体积表面平均直径（VMD）可达到最小40µm左右。得到了不同雾化器转速组合下的沉积情况。结果表明，P喷嘴转速为4600 rpm和C喷嘴转速为18000 rpm时沉积效率最高。该组合叶片正面盖度为3.6% ~ 9.3%，每平方厘米有102.7 ~ 184.3个液滴；背面的覆盖率为1.9% ~ 3.3%，每平方厘米有51.5 ~ 84.7个液滴。此外，通过对单个雾化离心喷嘴的对比，也显示了多个雾化离心喷嘴在沉积效率方面的优势。单个雾化离心喷嘴的背面覆盖面积和液滴密度明显低于上述转速组合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Evaluation of spraying characteristics of a new multiple centrifugal nozzle applied to UAV

Plant protection unmanned aerial vehicles (UAVs) have been widely used in fruit tree plant protection in recent years, especially in hilly and mountainous application scenarios. The ability of UAVs to meet the requirements of citrus red spider control is a current concern for UAV manufacturers, agricultural service organizations, and citrus growers. In this study, a UAV with a multiple centrifugal nozzle was tested. The nozzle has two atomizers, the inner atomizer (P) and the outer atomizer (C), which can achieve multiple droplet atomization. First, the droplet fragmentation characteristics and the droplet size of the nozzle were measured. A high-speed camera was used to study droplet fragmentation characteristics. The atomization process was divided into three stages: the first atomization triggered by the rotation of P, the second atomization caused by the impact of C, and the collisional agglomeration of small droplets around the nozzle. The result of the droplet size test showed that droplet size is inversely proportional to the rotational speed of P. The volume surface mean diameter (VMD) could reach a minimum of about 40 µm by adjusting the rotational speeds of atomizers P and C. In addition, an UAV(EA-30XP) equipped with this nozzle was used for field evaluations. The deposition under different atomizer rotational speed combinations was obtained. The result showed that a P atomizer rotational speed of 4600 rpm and a C rotational speed of 18000 rpm gave the highest deposition efficiency. Coverage on adaxial surface of the leaf in this combination was 3.6 %–9.3 %, with 102.7–184.3 droplets per square centimeter; coverage of the abaxial surface was 1.9 %–3.3 %, with 51.5–84.7 droplets per square centimeter. In addition, the advantages of multiple atomizing centrifugal nozzle in terms of deposition efficiency were also shown in a comparison with single atomizing centrifugal nozzle. The coverage and droplet density of abaxial surface by the single atomizing centrifugal nozzle were significantly lower than the above rotational speed combinations.

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来源期刊

Computers and Electronics in Agriculture 工程技术-计算机：跨学科应用

CiteScore

15.30

自引率

14.50%

发文量

800

审稿时长

62 days

期刊介绍： Computers and Electronics in Agriculture provides international coverage of advancements in computer hardware, software, electronic instrumentation, and control systems applied to agricultural challenges. Encompassing agronomy, horticulture, forestry, aquaculture, and animal farming, the journal publishes original papers, reviews, and applications notes. It explores the use of computers and electronics in plant or animal agricultural production, covering topics like agricultural soils, water, pests, controlled environments, and waste. The scope extends to on-farm post-harvest operations and relevant technologies, including artificial intelligence, sensors, machine vision, robotics, networking, and simulation modeling. Its companion journal, Smart Agricultural Technology, continues the focus on smart applications in production agriculture.