Development and characterization of a fixed sprinkler with a rotating serrated plate

Detalhes bibliográficos
Autor(a) principal: Antonio Veronez de Sousa, Sérgio
Data de Publicação: 1998
Outros Autores: Mota Ramos, Márcio, Chartuni Mantovani, Everardo, Falco Pruski, Fernando, Alves Soares, Antonio
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/4836
Resumo: The objective of the present work was to develop serrated deflector plates with rotating movement and to determine the precipitation profile and hydraulics characteristics of one irrigation spray nozzles working with the deflector plates developed. The number of serrates and the diameter used were the same as for the conventional fixed plate. However, serrates were made in helicoydal form to ensure the rotating movement. Plane, concave and convex plates with a ten-degree angle were developed. The concave plate presented the highest wetted radius and consequently the lowest average precipitation rate, specially for lower height of sprinkler positioning. In general, the average precipitation rate decreased as the sprinkler height increased. The precipitation profiles for sprays with the plate were used to simulate the Christiansen Uniformity Coefficient (CUC) for center pivot and linear systems. The CUC increased as the sprinkler spacing decreased. All the CUC were higher than the minimum recommended. There was no difference between the CUC values for the different plates.
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spelling Development and characterization of a fixed sprinkler with a rotating serrated plateDesenvolvimento e caracterização de um aspersor fixo equipado com placa defletora estriada com movimento rotativospray; irrigationplaca defletora rotativa; difusor; irrigaçãoThe objective of the present work was to develop serrated deflector plates with rotating movement and to determine the precipitation profile and hydraulics characteristics of one irrigation spray nozzles working with the deflector plates developed. The number of serrates and the diameter used were the same as for the conventional fixed plate. However, serrates were made in helicoydal form to ensure the rotating movement. Plane, concave and convex plates with a ten-degree angle were developed. The concave plate presented the highest wetted radius and consequently the lowest average precipitation rate, specially for lower height of sprinkler positioning. In general, the average precipitation rate decreased as the sprinkler height increased. The precipitation profiles for sprays with the plate were used to simulate the Christiansen Uniformity Coefficient (CUC) for center pivot and linear systems. The CUC increased as the sprinkler spacing decreased. All the CUC were higher than the minimum recommended. There was no difference between the CUC values for the different plates.O objetivo do presente trabalho foi desenvolver placas defletoras estriadas com movimento rotativo e determinar o perfil de precipitação e as características hidráulicas de um aspersor fixo operando com as placas desenvolvidas. No desenvolvimento, foram mantidas as características de uma placa estriada fixa convencional, quanto ao número de estrias e diâmetro da placa, sendo as estrias feitas em helicóides, para possibilitar o movimento rotativo das placas. Foram desenvolvidos três tipos de placas: plana, côncava e convexa, as duas últimas apresentando uma inclinação de 10o. Constatou-se que a placa côncava foi a que apresentou os maiores valores de raio molhado e, consequentemente, os menores valores de intensidade de precipitação média; as diferenças mais acentuadas, entre a placa côncava e as demais, foram observadas nas menores alturas de instalação do difusor. De modo geral, o aumento na altura do difusor proporcionou reduções nos valores de intensidade de precipitação. Simulou-se, a partir dos perfis de precipitação, o coeficiente de uniformidade de Christiansen (CUC), para sistemas de irrigação do tipo pivô central e linear. Os valores de CUC simulados foram elevados, superando, na maioria dos casos estudados, os valores mínimos recomendados; os menores espaçamentos resultaram, de modo geral, nos maiores valores de CUC. Não foi evidenciada uma placa que se destacasse por apresentar os maiores valores de CUC.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraAntonio Veronez de Sousa, SérgioMota Ramos, MárcioChartuni Mantovani, EverardoFalco Pruski, FernandoAlves Soares, Antonio1998-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4836Pesquisa Agropecuaria Brasileira; v.33, n.2, fev. 1998; 163-174Pesquisa Agropecuária Brasileira; v.33, n.2, fev. 1998; 163-1741678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4836/6946info:eu-repo/semantics/openAccess2014-11-13T18:37:08Zoai:ojs.seer.sct.embrapa.br:article/4836Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-11-13T18:37:08Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Development and characterization of a fixed sprinkler with a rotating serrated plate
Desenvolvimento e caracterização de um aspersor fixo equipado com placa defletora estriada com movimento rotativo
title Development and characterization of a fixed sprinkler with a rotating serrated plate
spellingShingle Development and characterization of a fixed sprinkler with a rotating serrated plate
Antonio Veronez de Sousa, Sérgio
spray; irrigation
placa defletora rotativa; difusor; irrigação
title_short Development and characterization of a fixed sprinkler with a rotating serrated plate
title_full Development and characterization of a fixed sprinkler with a rotating serrated plate
title_fullStr Development and characterization of a fixed sprinkler with a rotating serrated plate
title_full_unstemmed Development and characterization of a fixed sprinkler with a rotating serrated plate
title_sort Development and characterization of a fixed sprinkler with a rotating serrated plate
author Antonio Veronez de Sousa, Sérgio
author_facet Antonio Veronez de Sousa, Sérgio
Mota Ramos, Márcio
Chartuni Mantovani, Everardo
Falco Pruski, Fernando
Alves Soares, Antonio
author_role author
author2 Mota Ramos, Márcio
Chartuni Mantovani, Everardo
Falco Pruski, Fernando
Alves Soares, Antonio
author2_role author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Antonio Veronez de Sousa, Sérgio
Mota Ramos, Márcio
Chartuni Mantovani, Everardo
Falco Pruski, Fernando
Alves Soares, Antonio
dc.subject.por.fl_str_mv spray; irrigation
placa defletora rotativa; difusor; irrigação
topic spray; irrigation
placa defletora rotativa; difusor; irrigação
description The objective of the present work was to develop serrated deflector plates with rotating movement and to determine the precipitation profile and hydraulics characteristics of one irrigation spray nozzles working with the deflector plates developed. The number of serrates and the diameter used were the same as for the conventional fixed plate. However, serrates were made in helicoydal form to ensure the rotating movement. Plane, concave and convex plates with a ten-degree angle were developed. The concave plate presented the highest wetted radius and consequently the lowest average precipitation rate, specially for lower height of sprinkler positioning. In general, the average precipitation rate decreased as the sprinkler height increased. The precipitation profiles for sprays with the plate were used to simulate the Christiansen Uniformity Coefficient (CUC) for center pivot and linear systems. The CUC increased as the sprinkler spacing decreased. All the CUC were higher than the minimum recommended. There was no difference between the CUC values for the different plates.
publishDate 1998
dc.date.none.fl_str_mv 1998-02-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/4836
url https://seer.sct.embrapa.br/index.php/pab/article/view/4836
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/4836/6946
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.33, n.2, fev. 1998; 163-174
Pesquisa Agropecuária Brasileira; v.33, n.2, fev. 1998; 163-174
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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