Caracterização hidráulica de tubos porosos

Abstract

The increase of anthropic activity brings with it environmental degradation and increase on waste generation. Among these residues are the unusable tires. They can be used to manufacture porous tubes used in irrigation or aeration of fish ponds, being manufactured through extrusion process. There is no methodology to characterize the hydraulics of this kind of pipe and its hydraulic performance is questionable since the permeability of its wall in contact with water seems to decrease with time. The objective of this research was to characterize the hydraulic of porous pipes. Therefore, experiments were performed to determine the variation of permeability with time, the head loss, friction factor and roughness. After the experiments, statistical tests were applied to determine significance. With the obtained results, it can be stated that there is a variation on permeability with time and that it tends to decrease after each irrigation. After a certain time, the permeability values become constant and it is possible to determine a basic flow rate. In addition, the pipes have variability among samples from the same batch and there is a variability in the permeability obtained within the same sample. When comparing multiple pairs, it is noted that some samples are similar and others different.