Influência da assistência a ar na distribuição volumétrica de duas pontas de pulverização

Abstract

The work will aimed to evaluate the effect of different speeds of environmental wind and air assistance on the individual volumetric distribution profile and superimposed for two flat fan spray nozzles. The work was be developed at the Agricultural Mechanization Laboratory of Pampa (LAMAP) located at the Federal University of Pampa (Unipampa) in the city of Alegrete (RS), with an air assistance boom sprayer. The analysis of the volumetric distribution was performed using a distribution testing table with the spray nozzles API 11003 and JAP 11002, and spray pressure of 413.7 kPa. The procedure consisted of three air assistance speeds: 0, 15 and 28 km h-1 , with three ambient wind speeds: 0, 8 and 12 km h-1 . The overlays were simulated from the pattern of individual spray nozzles distribution and the homogeneity of the liquid distribution was evaluated based on the variation coefficient. It was found that the uniformity of the spray nozzles volumetric distribution was influenced by the air assistance and environment wind, whereas the air assistance usage promoted the lowest values of the variation coefficient, with emphasis on its maximum speed.