Rotor-rotor interaction of remotely piloted multicopters and their influence on an on-board spraying system
Department of Mechanical Engineering, University of Canterbury
Time & Place
Wed, 03 Apr 2019 12:00:00 NZDT in E14 (Lecture Theatre), Engineering CORE
All are welcome
Remotely piloted multicopters offer low-cost, low-risk precision aerial spraying capabilities They open opportunities that otherwise are not available and can deliver pesticides in the required spot or spray without operator participation in the process. However, there is unknown distribution in the spray pattern of the UAV due to the close proximity of propellers, body, lower flying speeds. The problem becomes more complex with the increasing number of the rotor. The solution to this problem requires comprehensive studying of the downwash as well as the understanding of droplet behaviour in this downwash.
An experiment was set up to investigate the flow field dynamics of a multi-rotor array and the impact of the downwash on the spray droplet trajectories. PIV was used to quantify the velocity fields under the rotors. A Laskin seeder unit was developed to produce tracer particles.
The downwash was observed to fluctuate due to the close proximity of neighbouring propellers. This is considered to influence the dispersion of sprayed droplets. The paths of spray droplets, from different hypothetical positions of the nozzle, were calculated through PIV data. This allows optimizing position and nozzle geometry to achieve an efficient spot and field spraying.
All are welcome!