A numerical analysis of flat fan aerial crop spray

2nd International Conference on Computational Fluid Dynamics in Research and Industry

力学;计算机科学;工业技术

Malik Fesal, Siti Natasha^1 ; Fawzi, Mas^2 ; Omar, Zamri^1

Mechanical Engineering Department, Politeknik Ungku Omar, Malaysia^1

Faculty Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Malaysia^2

关键词: Atmospheric stability;    Critical component;    Droplet trajectories;    Droplets trajectories;    Particle dispersion;    Plant protection products;    Shareholder values;    Uniform deposition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/243/1/012044/pdf
DOI  :  10.1088/1757-899X/243/1/012044

来源: IOP

【 摘 要 】

Spray drift mitigation, in the agriculture aerial spraying literature, and spray quality in the application of plant protection products, still continues as two critical components in evaluating shareholder value. A study on off-target drift and ground deposit onto a 250 m strip were simulated through series of Computational Fluid Dynamic (CFD) simulations. The drift patterns for evaporating droplets were released from a constant aircraft velocity at 30 m/s (60 mph) carrying 20 m swath width spray boom with 12 fan-type nozzles at released height from the ground ranging from 3.7 m to 4.7 m. Droplet trajectories are calculated from the given airspeed with a Lagrangian model for particle dispersion excluding any wind effect perturbation. The proposed CFD's model predictions agreed well with cited literatures for a wide range of atmospheric stability values. The results revealed that there is considerable increased in spray drift and droplets trajectories with the increased in spray released height. It suggested that a combination of low aircraft spray released height with low airspeed is essential to improve spray quality and maximizing uniform deposition on the target area are significant in minimizing spray drift risks.