Efeito da simetria do jorro na uniformidade de distribuição volumétrica de pontas hidráulicas de jato plano.

Abstract

The plane jet nozzles operate with superposition of the jet laterals in order to increase the volumetric distribution uniformity. This study was carried out to evaluate the effect of the jet symmetry on the volumetric distribution uniformity of hydraulic plane jet nozzles. The plane jet nozzles provided with opening angles of 110° and flow rate of 0.2 gallons min -1 were evaluated. The individual distribution profiles of the nozzles subjected to operating pressures of 100, 200, 300, 400 and 500 kPa were determined at heights of 40, 50 and 60cm. The volumetric distribution homogeneity was evaluated on the basis of the variation coefficient. For determining the symmetry, the symmetry index (percent liquid deposited at the right of the jet center divided by the percent liquid deposited at the left of the jet center) was used. It is concluded that nozzles with high symmetry indexes of the spray jet angle rather provide low volumetric distribution uniformity. Although, nozzles with appropriate symmetry might provide a volumetric distribution with high variation coefficients.