Journal
BIOSYSTEMS ENGINEERING
Volume 145, Issue -, Pages 52-64Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.biosystemseng.2016.02.014
Keywords
Aerial application; Spray drift; Wake vortices; Crosswind; Computational fluid dynamics
Funding
- Cultivation and Development Special Project of Beijing Science and Technology Innovation Base [Z151100001615016]
- International Cooperation Fund of Beijing Academy of Agriculture and Forestry Sciences project wind field measurements and control of drift of plant protection UAV [GJHZ2015-7]
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A study of the velocity field of the wake of a Thrush 510G carrying out spray application close to the ground was investigated. The aircraft normally operates in extreme ground effect and wake vortices play a major role in the dispersal and deposition of pesticide spray released behind the aircraft. The evolution of wake vortices over time, and their interaction with the ground were simulated using computational fluid dynamics (CFD) techniques. The simulation was initialised with meteorological data from a field experiment. Information given by CFD simulation included the trajectory of the wake vortices as well as circulation, which indicates the strength of vortex. This information provided insights into the velocity field in the wake, including the upwash near the wing tips and the downwash in between. The effect of turbulence intensity as well as crosswind on the wake vortices and the resulting velocity field were investigated. (C) 2016 IAgrE. Published by Elsevier Ltd. All rights reserved.
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