DOIAbstract
The effects of orifice wear on the spray patterns and orifice dimensions of fan nozzles made of different materials, types and capacities were investigated. A wear stand and a patternator system were developed to rapidly evaluate artificial wear effect and the spray deposit distribution, respectively. Theoretical analysis showed, that the percentage increase of orifice area is identical to the percentage increase of minor axis of tip orifice. Results indicated that there were some differences between spray deposit distributions of new and worn fan nozzles. The width of the spray pattern remained nearly constant but worn nozzles delivered larger volumes of liquid in the center of the spray boom
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