Establishing reference nozzles for classification of aerial application spray technologies

Bradley K. Fritz, W. Clint Hoffmann

Abstract


Abstract: Measurement of droplet size from agricultural spray nozzles can be highly variable and heavily influenced by measurement systems, methods and physical difference in measurement facilities.  Past efforts have developed a series of nozzles and operational pressure pairings that are used to define relative droplet size classes across the wide range of sizes typical in agrochemical applications.  Until recently, the developed classification standards were only application non-aerial spray technologies, as the paired nozzle and pressures used did not account for the secondary breakup resulting from high airspeed typical to agricultural aircraft.  A new standard has addressed this issue, with dedicated nozzle/spray pressure pairs designed to generate similar classification boundaries to current standards while operating in high airspeed conditions.  To support the application of this standard, multiple sets of dedicated droplet size matched nozzles were developed.

Keywords: Agricultural application, application technology, droplet size, size classification

DOI: 10.33440/j.ijpaa.20180101.0003

Citation: Fritz B K, Hoffmann W C. Establishing reference nozzles for classification of aerial application spray technologies.  Int J Precis Agric Aviat, 2018; 1(1): 10–14.


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References


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