Donald Dekeyser

TL;DR: In this article, the authors measured droplet sizes and velocities at 0.50 m below the nozzle using a PDPA laser-based measurement setup, and the effects of nozzle type (standard, low-drift, and air-inclusion), nozzle size (ISO 02, 03, 04, and 06) and operating pressure (2.0, 3.0 and 4.0 bar) were tested.

TL;DR: In this paper, wind tunnel measurements were used to measure airborne and fallout spray volumes for 10 different spray nozzles, and drift potential reduction percentages (DPRPs), expressing the reduction of the drift potential compared with the reference spraying, were calculated using the following three different approaches: DPRP V1 was calculated based on calculating the first moment of the airborne spray profile.

TL;DR: An in-field analysis of the on-target deposition profiles from three distinct sprayer types in trees of four different apple and pear training systems showed that there was a strong relationship between the vertical leaf deposition profile and the outlet air flow pattern from the sprayers.

TL;DR: In this paper, the results of a five-year study of drift from field crop sprayers using a unique integrated approach were presented. And a validated 3-D computational fluid dynamics (CFD) mechanistic drift model was developed, which can be used for a systemic study of different influencing factors.

TL;DR: In this paper, three commercially available, air-assisted orchard sprayers with different types of air discharge systems were characterised, and experiments were carried out to assess the spray nozzles, the spray liquid distribution and the produced air stream.