Design and optimization of an umbrella-type shield based on 3D CFD simulation technology

Li, Longfei (author), He, Xin (author), Jiao, Taowei (author), Xiao, Yumeng (author), Wei, Xipan (author), Li, Wei (author)

Mechanical shields can effectively alleviate the problems of low pesticide utilization and severe environmental pollution. This manuscript uses a computational fluid dynamics (CFD) method to investigate the anti-drift mechanism of mechanical shields, study the airflow forms around them, and establish an accurate simulation model. The aerodynamic characteristics of six shields were studied, and their anti-drift effect was compared. Then, the size and working parameters were optimized using the response surface methodology (RSM). Mechanical shields can significantly improve the fog droplet deposition rate (DR) compared with the conventional spray method (no shield), among which the umbrella-type shield has the best effect; optimizing the size and selecting suitable working parameters can increase the DR to 77.31 %. The field trial showed that the DR of the conventional spray method was reduced by 31.9 % at 5 m/s compared with 3 m/s, while the DR of the shield spray method was reduced by only 3.6 % at 5 m/s compared with 3 m/s, which proved the excellent performance of the mechanical shields. The field trial results were consistent with the CFD simulation, and the relative deviation of the DR between the two was within 4 %, so the accuracy and reliability of the CFD simulation model were proved.

• Language: English
• Keywords: mechanical shield, anti-drift, CFD simulation
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: 11 str.
• Numbering: Vol. 69, no. 9/10
• PID: 20.500.12556/RUL-151864
• UDC: 004.4
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2023.644
• COBISS.SI-ID: 168834563
• Publication date in RUL: 23.10.2023

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Title: Zasnova in optimizacija dežnikastega ščita s tehnologijo simulacij 3D CFD
• Keywords: mehanski ščit, mehanizem za preprečevanje drifta, računalniška dinamika fluidov, aerodinamične lastnosti, stopnja odlaganja kapljic, metoda odzivnih površin