Hydraulic characterization of turbulent flow drippers

Detalhes bibliográficos
Autor(a) principal: Fischer Filho, João A. [UNESP]
Data de Publicação: 2018
Outros Autores: da Silva, Yane de Freitas [UNESP], Dalri, Alexandre B. [UNESP], Palaretti, Luiz Fabiano [UNESP], Zanini, José R. [UNESP], Coelho, Anderson Prates [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.15809/irriga.2018v23n2p380-389
http://hdl.handle.net/11449/228667
Resumo: In the evaluation of hydraulic performance of four models of not self-compensating drippers was used a bench of tests with capacity for 25 drippers of each model. Each model was subjected to different pressures (p), thus determining the mean flow rate (q), the coefficient of manufacturing variation (CVf) and the characteristic equation of the dripper (q versus p). Subsequently, the Christiansen (CUC) and distribution (CUD) uniformity coefficients for 16 drippers of each evaluated model were determined under field conditions in a flat area. A completely randomized design with four repetitions and Tukey’s test were used to compare means of CUD and CUC. The four models, operating at nominal pressures, had flow rates of, respectively, 2.22; 1.30; 1.45 and 1.93 L h -1 and mean CVf of, respectively, 1.30%; 3.61%; 2.65% and 3.97%, being characterized as having excellent and average uniformity. The four models were fitted under a turbulent flow regime, with exponent values x of the characteristic equation of the dripper varying between 0.4714 and 0.5174, and R 2 determination coefficients above 99%. The values of CUC and CUD differed statistically and were, on average, higher than 90% and, in particular, the Driptech and Dripline drippers.
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spelling Hydraulic characterization of turbulent flow drippersCaracterização hidráulica de gotejadores de fluxo turbulentoCharacteristic equationDrip irrigationUniformityIn the evaluation of hydraulic performance of four models of not self-compensating drippers was used a bench of tests with capacity for 25 drippers of each model. Each model was subjected to different pressures (p), thus determining the mean flow rate (q), the coefficient of manufacturing variation (CVf) and the characteristic equation of the dripper (q versus p). Subsequently, the Christiansen (CUC) and distribution (CUD) uniformity coefficients for 16 drippers of each evaluated model were determined under field conditions in a flat area. A completely randomized design with four repetitions and Tukey’s test were used to compare means of CUD and CUC. The four models, operating at nominal pressures, had flow rates of, respectively, 2.22; 1.30; 1.45 and 1.93 L h -1 and mean CVf of, respectively, 1.30%; 3.61%; 2.65% and 3.97%, being characterized as having excellent and average uniformity. The four models were fitted under a turbulent flow regime, with exponent values x of the characteristic equation of the dripper varying between 0.4714 and 0.5174, and R 2 determination coefficients above 99%. The values of CUC and CUD differed statistically and were, on average, higher than 90% and, in particular, the Driptech and Dripline drippers.Departamento de Engenharia Rural Universidade Estadual Paulista – Câmpus Jaboticabal Via de Acesso Professor Paulo Donato Castelane, Vila IndustrialDepartamento de Engenharia Rural Universidade Estadual Paulista – Câmpus Jaboticabal Via de Acesso Professor Paulo Donato Castelane, Vila IndustrialUniversidade Estadual Paulista (UNESP)Fischer Filho, João A. [UNESP]da Silva, Yane de Freitas [UNESP]Dalri, Alexandre B. [UNESP]Palaretti, Luiz Fabiano [UNESP]Zanini, José R. [UNESP]Coelho, Anderson Prates [UNESP]2022-04-29T08:27:57Z2022-04-29T08:27:57Z2018-05-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.15809/irriga.2018v23n2p380-389IRRIGA, v. 23, n. 2, 2018.1808-37651413-7895http://hdl.handle.net/11449/22866710.15809/irriga.2018v23n2p380-3892-s2.0-85062669560Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporIRRIGAinfo:eu-repo/semantics/openAccess2024-06-06T15:18:02Zoai:repositorio.unesp.br:11449/228667Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:25:29.297501Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Hydraulic characterization of turbulent flow drippers
Caracterização hidráulica de gotejadores de fluxo turbulento
title Hydraulic characterization of turbulent flow drippers
spellingShingle Hydraulic characterization of turbulent flow drippers
Fischer Filho, João A. [UNESP]
Characteristic equation
Drip irrigation
Uniformity
title_short Hydraulic characterization of turbulent flow drippers
title_full Hydraulic characterization of turbulent flow drippers
title_fullStr Hydraulic characterization of turbulent flow drippers
title_full_unstemmed Hydraulic characterization of turbulent flow drippers
title_sort Hydraulic characterization of turbulent flow drippers
author Fischer Filho, João A. [UNESP]
author_facet Fischer Filho, João A. [UNESP]
da Silva, Yane de Freitas [UNESP]
Dalri, Alexandre B. [UNESP]
Palaretti, Luiz Fabiano [UNESP]
Zanini, José R. [UNESP]
Coelho, Anderson Prates [UNESP]
author_role author
author2 da Silva, Yane de Freitas [UNESP]
Dalri, Alexandre B. [UNESP]
Palaretti, Luiz Fabiano [UNESP]
Zanini, José R. [UNESP]
Coelho, Anderson Prates [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Fischer Filho, João A. [UNESP]
da Silva, Yane de Freitas [UNESP]
Dalri, Alexandre B. [UNESP]
Palaretti, Luiz Fabiano [UNESP]
Zanini, José R. [UNESP]
Coelho, Anderson Prates [UNESP]
dc.subject.por.fl_str_mv Characteristic equation
Drip irrigation
Uniformity
topic Characteristic equation
Drip irrigation
Uniformity
description In the evaluation of hydraulic performance of four models of not self-compensating drippers was used a bench of tests with capacity for 25 drippers of each model. Each model was subjected to different pressures (p), thus determining the mean flow rate (q), the coefficient of manufacturing variation (CVf) and the characteristic equation of the dripper (q versus p). Subsequently, the Christiansen (CUC) and distribution (CUD) uniformity coefficients for 16 drippers of each evaluated model were determined under field conditions in a flat area. A completely randomized design with four repetitions and Tukey’s test were used to compare means of CUD and CUC. The four models, operating at nominal pressures, had flow rates of, respectively, 2.22; 1.30; 1.45 and 1.93 L h -1 and mean CVf of, respectively, 1.30%; 3.61%; 2.65% and 3.97%, being characterized as having excellent and average uniformity. The four models were fitted under a turbulent flow regime, with exponent values x of the characteristic equation of the dripper varying between 0.4714 and 0.5174, and R 2 determination coefficients above 99%. The values of CUC and CUD differed statistically and were, on average, higher than 90% and, in particular, the Driptech and Dripline drippers.
publishDate 2018
dc.date.none.fl_str_mv 2018-05-15
2022-04-29T08:27:57Z
2022-04-29T08:27:57Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.15809/irriga.2018v23n2p380-389
IRRIGA, v. 23, n. 2, 2018.
1808-3765
1413-7895
http://hdl.handle.net/11449/228667
10.15809/irriga.2018v23n2p380-389
2-s2.0-85062669560
url http://dx.doi.org/10.15809/irriga.2018v23n2p380-389
http://hdl.handle.net/11449/228667
identifier_str_mv IRRIGA, v. 23, n. 2, 2018.
1808-3765
1413-7895
10.15809/irriga.2018v23n2p380-389
2-s2.0-85062669560
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv IRRIGA
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128512876347392