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As-Applied Estimation Of Volumetric Flow Rate From A Single Sprayer Nozzle Series Using Water-Sensitive Spray Cards, Michael P. Sama, John T. Evans, Aaron P. Turner, Surya Saket Dasika
As-Applied Estimation Of Volumetric Flow Rate From A Single Sprayer Nozzle Series Using Water-Sensitive Spray Cards, Michael P. Sama, John T. Evans, Aaron P. Turner, Surya Saket Dasika
Biosystems and Agricultural Engineering Faculty Publications
The objective of this study was to test the feasibility of using coverage measurements from water-sensitive spray cards to estimate the volumetric flow rate at an individual sprayer nozzle. TeeJet VisiFlow Even Flat Spray Tips were selected due to their uniform distribution of coverage. Spray distribution for each nozzle was validated using a spray patternator table with 2.5 cm sampling widths. A rotary test fixture translated water-sensitive spray cards through the spray dispersion (water at ambient conditions) at a constant angular velocity and a radius of 1.2 m. The test fixture measured volumetric flow and pressure at the nozzle and …
Recalibration Methodology To Compensate For Changing Fluid Properties In An Individual Nozzle Direct Injection System, Joe D. Luck, Scott A. Shearer, Brian D. Luck, Michael P. Sama
Recalibration Methodology To Compensate For Changing Fluid Properties In An Individual Nozzle Direct Injection System, Joe D. Luck, Scott A. Shearer, Brian D. Luck, Michael P. Sama
Biosystems and Agricultural Engineering Faculty Publications
Limited advancement of direct injection pesticide application systems has been made in recent years, which has hindered further commercialization of this technology. One approach to solving the lag and mixing issues typically associated with injection-based systems is high-pressure individual nozzle injection. However, accurate monitoring of the chemical concentrate flow rate can pose a challenge due to the high pressure, low flow, and changing viscosities of the fluid. A methodology was developed for recalibrating high-pressure chemical concentrate injectors to compensate for fluid property variations and evaluate the performance of this technique for operating injectors in an open-loop configuration. Specific objectives were …