Iterative calculation of local head loss coefficient of emitters in lateral lines
ABSTRACT This study aimed to iteratively set the local head loss coefficient of the Naan® micro-sprinkler, model 7110 Hadar, installed in a lateral irrigation line. To evaluate the total head loss along the lateral line, tests were performed using a rigid PVC pipe with an inner diameter of 15.8 mm,...
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Universidade Federal de Campina Grande
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| Series: | Revista Brasileira de Engenharia Agrícola e Ambiental |
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| Online Access: | http://www.scielo.br/pdf/rbeaa/v25n5/1807-1929-rbeaa-25-05-0291.pdf |
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| author | Giuliani Prado Rafael R. Bruscagin Adriano C. Tinos Edmilson C. Bortoletto Denise Mahl |
| author_facet | Giuliani Prado Rafael R. Bruscagin Adriano C. Tinos Edmilson C. Bortoletto Denise Mahl |
| author_sort | Giuliani Prado |
| collection | DOAJ |
| description | ABSTRACT This study aimed to iteratively set the local head loss coefficient of the Naan® micro-sprinkler, model 7110 Hadar, installed in a lateral irrigation line. To evaluate the total head loss along the lateral line, tests were performed using a rigid PVC pipe with an inner diameter of 15.8 mm, 12 m in length, and 24 micro-sprinklers inserted along the pipe, regularly spaced 0.5 m. In the tests carried out for four micro-sprinkler nozzle diameters (0.9, 1.0, 1.1, and 1.2 mm) and six inlet pressure head values (5, 10, 15, 20, 25, and 30 m) in the line, the pressure head difference between inlet and outlet in the pipe and the discharge of each emitter along the pipe were measured. The head loss computation was performed by the step-by-step procedure, starting from the downstream end to the upstream end of the line; since varying the local head loss coefficient values iteratively, the total head loss measured in the tests was equal to the calculated. For the different working conditions of the inlet pressure head and the micro-sprinkler nozzle diameter, the local head loss coefficient had values from 0.051 to 0.169. Relating the discharge values measured and estimated along the lateral line, the confidence coefficient of 0.9991 was verified, and the calculation procedure was considered optimal. |
| format | Article |
| id | doaj-art-324924f653c94ef5821a592f9d6d8535 |
| institution | Kabale University |
| issn | 1807-1929 |
| language | English |
| publisher | Universidade Federal de Campina Grande |
| record_format | Article |
| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-324924f653c94ef5821a592f9d6d85352025-08-20T03:55:03ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-192910.1590/1807-1929/agriambi.v25n5p291-296Iterative calculation of local head loss coefficient of emitters in lateral linesGiuliani PradoRafael R. BruscaginAdriano C. TinosEdmilson C. BortolettoDenise MahlABSTRACT This study aimed to iteratively set the local head loss coefficient of the Naan® micro-sprinkler, model 7110 Hadar, installed in a lateral irrigation line. To evaluate the total head loss along the lateral line, tests were performed using a rigid PVC pipe with an inner diameter of 15.8 mm, 12 m in length, and 24 micro-sprinklers inserted along the pipe, regularly spaced 0.5 m. In the tests carried out for four micro-sprinkler nozzle diameters (0.9, 1.0, 1.1, and 1.2 mm) and six inlet pressure head values (5, 10, 15, 20, 25, and 30 m) in the line, the pressure head difference between inlet and outlet in the pipe and the discharge of each emitter along the pipe were measured. The head loss computation was performed by the step-by-step procedure, starting from the downstream end to the upstream end of the line; since varying the local head loss coefficient values iteratively, the total head loss measured in the tests was equal to the calculated. For the different working conditions of the inlet pressure head and the micro-sprinkler nozzle diameter, the local head loss coefficient had values from 0.051 to 0.169. Relating the discharge values measured and estimated along the lateral line, the confidence coefficient of 0.9991 was verified, and the calculation procedure was considered optimal.http://www.scielo.br/pdf/rbeaa/v25n5/1807-1929-rbeaa-25-05-0291.pdfpressure heademitter dischargenozzle diameter |
| spellingShingle | Giuliani Prado Rafael R. Bruscagin Adriano C. Tinos Edmilson C. Bortoletto Denise Mahl Iterative calculation of local head loss coefficient of emitters in lateral lines Revista Brasileira de Engenharia Agrícola e Ambiental pressure head emitter discharge nozzle diameter |
| title | Iterative calculation of local head loss coefficient of emitters in lateral lines |
| title_full | Iterative calculation of local head loss coefficient of emitters in lateral lines |
| title_fullStr | Iterative calculation of local head loss coefficient of emitters in lateral lines |
| title_full_unstemmed | Iterative calculation of local head loss coefficient of emitters in lateral lines |
| title_short | Iterative calculation of local head loss coefficient of emitters in lateral lines |
| title_sort | iterative calculation of local head loss coefficient of emitters in lateral lines |
| topic | pressure head emitter discharge nozzle diameter |
| url | http://www.scielo.br/pdf/rbeaa/v25n5/1807-1929-rbeaa-25-05-0291.pdf |
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