果园多风道喷雾机送风系统设计优化与试验

doi:10.12133/j.smartag.SA202201015

摘要/Abstract

摘要：

针对果园多风道喷雾机内部气流分布不均导致由出风口吹出的气流紊乱、影响使雾滴在果树冠层上均匀沉积的问题，对多风道喷雾机内部导流板长度参数进行了优化。应用计算流体动力学（Computational Fluid Dynamics，CFD）技术，基于Star-CCM+软件对喷雾机送风系统内部气流进行了模拟分析，得到出风口1~6的风速在不同导流板长度的标准差分别为0.7468、0.6776、1.4441、5.1305、4.5768和0.8209。对风速标准差较大的出风口3、出风口4、出风口5进行响应面分析，最终确定导流板1长度200.00 mm、导流板2长度60.00 mm、导流板3长度50.00 mm为最优参数组合。在最优组合参数下，计算得到对称出风口3和出风口6的风速值分别为39.135和41.320 m/s，相对偏差为5.58%；出风口4和出风口5的风速值分别为33.022和34.328 m/s，相对偏差为3.95%，符合设计要求。室内风速试验结果表明，在距离喷雾机出风口1.25 m处，风场风速由上层到下层逐渐增大，实现风场按果树冠层形状分布，喷雾机左右两侧风场对称分布，气流分布均匀。果园多风道喷雾机设计满足要求，可为同类设计提供参考。

关键词: 计算流体力学, 多风道喷雾机, 送风系统, 流场仿真, 响应面法, 均匀沉积

Abstract:

In view of the uneven distribution of airflow inside the multi-air-duct sprayer, the air flow caused by the air outlet is disturbed and the droplet can not be evenly deposited on the fruit tree canopy. In this research, the length parameter of the inner baffle plate of the multi-duct sprayer was optimized. The Computational Fluid Dynamics (CFD) was used to simulate and analyze the internal airflow of the air supply system of the multi-duct sprayer based on Star-CCM+ software. The standard deviations of the wind speed of the wind outlet 1~6 at different guide plates were 0.7468, 0.6776, 1.4441, 5.1305, 4.5768 and 0.8209, respectively. Among them, the standard deviations of wind speed value at Point 1, Point 2 and Point 6 were less than 1, indicating that the change of deflector length has little impact on the speed change. The standard deviations of wind speed value at Point 3, Point 4 and Point 5 were large, indicating that with the change of deflector length, the wind speed at Air outlet 3, Air outlet 4, Air outlet 5 were greatly affected. On this basis, through the response surface analysis of Air outlet 3, Air outlet 4 and Air outlet 5, it was determined that, the length of Deflector 1 as 200 mm, the length of Deflector 2 as 60 mm and the length of Deflector 3 as 50 mm, was the optimal parameter combination. Under the optimal combination parameters, the wind speed values of symmetrical Air outlet 3 and Air outlet 6 were 39.135 and 41.320 m/s, respectively, with a relative deviations of 5.58%. The wind speed values of air outlet 4 and air outlet 5 were 33.022 and 34.328 m/s, respectively, with a relative deviation of 3.95%, which meeting the design requirements of sprayer. The indoor wind speed test results showed that the average wind speed of the upper layer was 15.75 m/s, the average wind speed of the middle layer was 20.83 m/s, and the average wind speed of the lower layer was 28.27 m/s, which met the end speed principle. The wind field was distributed according to the shape of the fruit tree canopy. The wind field of the left and right sides of the sprayer was symmetrical distributed and the air distribution was uniform. The work can provide a reference for the design of multi-duct sprayer.

Key words: Computational Fluid Dynamics (CFD), multi-duct sprayer, air supply system, flow field simulation, response surface methodology, uniform deposition

中图分类号:

S491

郭江鹏, 王鹏飞, 李昕昊, 杨欣, 李建平, 边永亮, 薛春林. 果园多风道喷雾机送风系统设计优化与试验[J]. 智慧农业(中英文), 2022, 4(3): 75-85.

GUO Jiangpeng, WANG Pengfei, LI Xinhao, YANG Xin, LI Jianping, BIAN Yongliang, XUE Chunlin. Design Optimization and Test of Air Supply System for Multi-Duct Sprayer[J]. Smart Agriculture, 2022, 4(3): 75-85.

参考文献

1	傅锡敏, 吕晓兰, 丁为民. 我国果园植保机械现状与技术需求[J]. 新疆农机化, 2011(1): 61-63.
1	FU X, LYU X, DING W. Current situation and technical demand of orchard plant protection machinery in China[J]. Xinjiang Agricultural Mechanization, 2011(1): 61-63.
2	BADULES J, VIDAL M, BONé A, et al. Comparative study of CFD models of the air flow produced by an air-assisted sprayer adapted to the crop geometry[J]. Computers and Electronics in Agriculture, 2018, 149: 166-174.
3	何雄奎. 中国精准施药技术和装备研究现状及发展建议[J]. 智慧农业(中英文), 2020, 2(1): 133-146.
3	HE X. Research progress and developmental recommendations on precision spraying technology and equipment in China[J]. Smart Agriculture, 2020, 2(1):133-146.
4	张燕妮, 翟长远, 赵娟. 果园风场与雾场测量建模方法[J]. 农机化研究, 2020, 42(4): 264-268.
4	ZHANG Y, ZHAI C, ZHAO J. Modeling and measuring method of orchard airflow and droplet field[J]. Journal of Agricultural Mechanization Research, 2020, 42(4): 264-268.
5	PFEIFFER S A, GUEVARA J, CHEEIN F A, et al. Mechatronic terrestrial LiDAR for canopy porosity and crown surface estimation[J]. Computers and Electronics in Agriculture, 2018, 146: 104-113.
6	GIL E, ARNO J, LLORENS J, et al. Advanced technologies for the improvement of spray application techniques in Spanish viticulture: An overview[J]. Sensors, 2014, 14(1): 691-708.
7	PETROVI? D. Odnos selektivnog i konvencionalnog raspr?ivanja te njihov utjecaj na depozit i zano?enje teku?ine[D]. Osijek: Josip Juraj Strossmayer University of Osijek, 2018.
8	GRELLA M, MARUCCO P, MANZONE M, et al. Effect of sprayer settings on spray drift during pesticide application in poplar plantations (Populus spp.)[J]. Science of the Total Environment, 2017, 578: 427-439.
9	康峰, 吴潇逸, 王亚雄, 等. 农药雾滴沉积特性研究进展与展望[J]. 农业工程学报, 2021, 37(20): 1-14.
9	KANG F, WU X, WANG Y, et al. Research progress and prospect of pesticide droplet deposition characteristics[J]. Transactions of the CSAE, 2021, 37(20): 1-14.
10	WU B, HUANG K, QING D, et al. Numerical simulation and optimization of perforated tube trolley in circular cooler[J]. World Journal of Engineering and Technology, 2017, 5(4): 684-695.
11	邱威, 丁为民, 汪小旵, 等. 3WZ-700 型自走式果园风送定向喷雾机[J]. 农业机械学报, 2012, 43(4): 26-30, 44.
11	QIU W, DING W, WANG X, et al. 3WZ-700 self-propelled air-blowing orchard sprayer[J]. Transactions of the CSAM, 2012, 43(4): 26-30, 44.
12	周良富, 傅锡敏, 丁为民, 等. 组合圆盘式果园风送喷雾机设计与试验[J]. 农业工程学报, 2015, 31(10): 64-71.
12	ZHOU L, FU X, DING W, et al. Design and experiment of combined disc air-assisted orchard sprayer[J]. Transactions of the CSAE, 2015, 31(10): 64-71.
13	陈帮.离心风机进气箱导流板的优化设计[J]. 煤矿机械, 2022, 43(2):130-134.
14	丁天航, 曹曙明, 薛新宇, 等. 果园喷雾机单双风机风道气流场仿真与试验[J]. 农业工程学报, 2016, 32(14): 62-68, 315.
14	DING T, CAO S, XUE X, et al. Simulation and experiment on single-channel and double-channel airflow field of orchard sprayer[J]. Transactions of the CSAE, 2016, 32(14): 62-68, 315.
15	ENDALEW A M, DEBAERB C, RUTTEN N, et al. A new integrated CFD modelling approach towards air-assisted orchard spraying—Part I: Model development and effect of wind speed and direction on sprayer airflow[J]. Computers and Electronics in Agriculture, 2010, 71(1): 128-136.
16	NUYTTENS D, ZWERTVAEGHER I K A, DEKEYSER D. Spray drift assessment of different application techniques using a drift test bench and comparison with other assessment methods[J]. Biosystems Engineering, 2017, 154: 14-24.
17	BADULES J, VIDAL M, BONé A, et al. Comparative study of CFD models of the air flow produced by an air-assisted sprayer adapted to the crop geometry[J]. Computers and Electronics in Agriculture, 2018, 149: 166-174.
18	HONG S W, ZHAO L, ZHU H. CFD simulation of airflow in side tree canopies discharged from air-assisted sprayers[J]. Computers and Electronics in Agriculture, 2017, 149: 121-132.
19	ZHENG Y, YANG S, LIU X, et al. The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV[J]. Frontiers of Agricultural Science and Engineering, 2018, 5(2): 159-167.
20	HO?OWNICKI R, DORUCHOWSKI G, ?WIECHOWSKI W, et al. Variable air assistance system for orchard sprayers: Concept, design and preliminary testing[J]. Biosystems Engineering, 2017, 163: 134-149.
21	翟长远, 张燕妮, 窦汉杰, 等. 果园风送喷雾机出风口风场CFD建模与试验[J]. 智慧农业(中英文) 2021, 3(3): 70-81.
21	ZHAI C, ZHANG Y, DOU H, et al. CFD modeling and experiment of airflow at the air outlet of orchard air-assisted sprayer[J]. Smart Agriculture, 2021, 3(3): 70-81.
22	李建平, 边永亮, 杨欣, 等. 果园多风机风送喷雾机作业参数优化与试验[J]. 吉林大学学报(工学版), 2022, 52(10): 2474-2485.
22	LI J, BIAN Y, YANG X, et al. Operational parameter optimization and testing of an air-assisted multi-fan orchard sprayer[J]. Journal of Jilin University (Engineering Edition), 2022, 52(10): 2474-2485.
23	姜宗月. 果园定向仿形弥雾机的研制与试验[D]. 泰安: 山东农业大学, 2014.
23	JIANG Z. Development and experiment of directional profiling orchard mist sprayer[D]. Taian: Shandong Agricultural University, 2014.
24	戴奋奋. 风送喷雾机风量的选择与计算[J]. 植物保护, 2008(6): 124-127.
24	DAI F. Selection and calculation of the blowing rate of air-assisted sprayers[J]. Plant Protection, 2008(6): 124-127.