Ângulo de giro e espaçamento entre carreadores em sistemas autopropelidos de irrigação com o aspersor PLONA-RL400.

Abstract

Laboratory measured values of discharge, radius of throw and radial precipitation profile of a PLONA-RL400 gun sprinkler were used in digital simulations of water application uniformity provided by traveling gun machines operating with this sprinkler under different combinations of wetted angle and towpath spacing. Simulated uniformity values were arranged and presented under three different clusters, each one corresponding to a different set of sprinkler operational conditions (nozzle versus service pressure) that results on the same radial precipitation profile geometrical shape (I, II or III). For the three profile shapes obtained, it was observed that higher uniformity values were achieved with towpath spacings of 80 to 90% of the wetted diameter, and wetted angles on the 180 to 230° range.