Simulação da distribuição de água em microaspersores sob condição de vento. / Simulation of microsprinkler water distribution under windy condition.

AUTOR(ES)

Marco Antônio Fonseca Conceição

DATA DE PUBLICAÇÃO

2002

RESUMO

Wind occurrence can modify water distribution by microsprinklers, reducing application efficiency and uniformity. Experimental tests to evaluate this distribution are, normally, cumbersome and frequently they can not be realized at all the operational and environmental conditions. The use of mathematical models for computational simulations permits, therefore, a more diversified and quickly combination of the intended analyses. Although it can be considered as a localized irrigation method, microsprinklers present operational and hydraulic characteristics closer to sprinkler than to drip irrigation. Simulations models developed for sprinkler systems can, therefore, be employed by microsprinklers. The present work had as a general objective the evaluating of a ballistic model, originally developed for sprinkler systems, on simulating water distribution by microsprinklers under windy condition. Experimental tests were carried out in laboratory using Dan 2001 microsprinklers with nozzle sizes of 0.84 mm (violet), 1.00 mm (gray), 1.10 mm (brown), 1.25 mm (blue), 1.33 mm (green), 1.48 mm (orange) and 1.75 mm (yellow). The violet, gray and brown nozzles operated using black spin and the others used blue spin. The wind effect was artificially simulated using fourteen fans (200 W power). Computational simulations were run employing the software SIRIAS, that is based on a ballistic model originally developed for sprinkler systems. Water distribution simulations in conditions of wind absence presented excellent performance for all the analyzed nozzles. In the other side, the model performance for windy condition varied according the nozzle and the utilized spin. For the black spin nozzles the performance was classified as very bad, for the violet one, and very good, for the gray and brown nozzles. For the others nozzles, that operated with blue spin, the performance was considered as regular.

ASSUNTO(S)

vento distribuição de água water distribution irrigação por microaspersão microsprinkler irrigation wind

Documentos Relacionados

• Simulação do efeito do vento na distribuição de água em microaspersores
• Trickle irrigation design and hidraulic simulation under variable operation condition.
• Simulação da distribuição de água em diferentes condições de vento e espaçamentos entre aspersores
• Use for computer simulation model of quality of water distribution network involving multiple species
• Simulação da dispersão de poluentes por modelo lagrangeano em condições de vento fraco