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Droplet Size And Nozzle Tip Pressure From A Pulse-Width Modulation Sprayer, Thomas R. Butts, Liberty E. Butts, Joe D. Luck, Bradley K. Fritz, Wesley C. Hoffmann, Greg R. Kruger
Droplet Size And Nozzle Tip Pressure From A Pulse-Width Modulation Sprayer, Thomas R. Butts, Liberty E. Butts, Joe D. Luck, Bradley K. Fritz, Wesley C. Hoffmann, Greg R. Kruger
West Central Research and Extension Center, North Platte
Pulse-width modulation (PWM) sprayers can improve application accuracy through flow control, turn compensation, and high-resolution overlap control by pulsing an electronically-actuated solenoid valve which controls the relative proportion of time each solenoid valve is open (duty cycle). The objective of this experiment was to identify the droplet size distribution and nozzle tip pressure when influenced by PWM duty cycle, nozzle technology, and gauge pressure to provide PWM guidelines. The experiment was conducted in a low-speed wind tunnel at the Pesticide Application Technology Laboratory using a SharpShooter® PWM system. In general, for non-venturi nozzles, as duty cycle decreased, droplet size slightly …