| Registro completo |
| Provedor de dados: |
REA
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| País: |
Brazil
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| Título: |
ASYMMETRIC WETTED SECTOR ANGLE IN WATER DISTRIBUTION OF TRAVELING GUN IRRIGATION SYSTEMS
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| Autores: |
Prado,Giuliani do
Colombo,Alberto
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| Data: |
2020-08-01
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| Ano: |
2020
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| Palavras-chave: |
Strip width
Travel path
Uniformity coefficient
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| Resumo: |
ABSTRACT This work aimed to simulate the water distribution of traveler gun irrigation, working with asymmetrical wetted angles and in windy conditions. In the simulations of a sprinkler with uniform radial profile, the following were considered: i) wetted angles between 180 and 330°; ii) wetted angle asymmetries from 0 to 90°; iii) wind speeds from 0 to 4.5 m s-1; and iv) wind direction of 0, 45, and 90°. Christiansen uniformity coefficients (CU) were calculated for strip widths from 30 to 100% of the sprinkler wetted diameter (WD). Regardless of the wetted angle adjustment, irrigations under wind speeds of 4.5 m s-1 should be avoided and strip spacings of less than 50% WD provide high CU for wind speeds up to 3.0 m s-1. For any wind conditions, asymmetries in the wetted angle led to a reduction in CU for a wetted angle of 210°. In the range of wetted angle from 270 to 330°, asymmetric adjustments of up to 20° provided a higher CU than 80% for a wind speed of 3 m s-1 and directions diagonal and perpendicular to the travel path associated with strip spacings between 60 to 70% WD, which are the spacings recommended by manufacturers of traveler irrigation machines.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400443
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| Editor: |
Associação Brasileira de Engenharia Agrícola
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| Relação: |
10.1590/1809-4430-eng.agric.v40n4p443-452/2020
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| Formato: |
text/html
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| Fonte: |
Engenharia Agrícola v.40 n.4 2020
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| Direitos: |
info:eu-repo/semantics/openAccess
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