20.500.12556/RUL-151864 Design and optimization of an umbrella-type shield based on 3D CFD simulation technology Zasnova in optimizacija dežnikastega ščita s tehnologijo simulacij 3D CFD 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. mechanical shield anti-drift CFD simulation mehanski ščit mehanizem za preprečevanje drifta računalniška dinamika fluidov aerodinamične lastnosti stopnja odlaganja kapljic metoda odzivnih površin true false true Angleški jezik Slovenski jezik Članek v reviji 2023-10-23 10:59:42 2023-10-23 10:59:45 2023-10-24 03:30:34 0000-00-00 00:00:00 2023 0 0 11 str. no. 9/10 Vol. 69 Sept./Oct. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.4 0039-2480 10.5545/sv-jme.2023.644 168834563 Li_..._Design_and_Optimization_of_an_Umbrella-Type_....pdf Li_..._Design_and_Optimization_of_an_Umbrella-Type_....pdf 1 AE5725F833095C168D0147FDB46F92AB 3056788252938673eb1f350dee47eaeb6ab6bf5303ce7c295dba4279375c2606 c5c9d028-7182-11ee-a210-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=176948 https://www.sv-jme.eu/sl/article/design-and-optimization-of-an-umbrella-type-shield-based-on-3d-cfd-simulation-technology/ 1 852ba93d-7182-11ee-a210-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=176947 Fakulteta za strojništvo Strojniški vestnik 0 0 0