"Caracterização hidráulica de tubulações laterais de microaspersão, utilizando microtubos como dissipadores de energia".

Abstract

This work was developed with the purpose of using microtubes as conduits of connection of the "Jatíssimo" microsprinkler to the side and as energy dissipating mechanism. The control of the pressure variation was based on the compensation of the losses of load on the side, with the variation of the lengths of the microtubes distributed in lateral in stretches. A pressure variation equal to 20% between its extremes was taken as the criterion for defining these stretches. Tests were performed with the microsprinkler and the emitter formed by the "micro-sprinkler / microtube" set, operating alone; and with the transmitter installed on the sides. The tests allowed to conclude that the emitters have flow regime, varying in the range of turbulent to totally turbulent; are excellent from the point of view of the manufacturing process; and the coefficient of distribution of Christiansen determined on the surface is not a good parameter to evaluate the water distribution of the microsprinkler. The use of the microtube provided good flow distribution uniformity of the micro-sprinklers and enabled a 48% increase in lateral pipe length, with 1.5m and 50% spaced transmitters with spacers 2.0 and 2.5 spaced m.