Perda de carga em reduções concêntricas de PVC

• Autor(a) principal: Oliveira, Francienne Gois [UNESP]
• Data de Publicação: 2011
• Outros Autores: Resende, Paulo Rogério Nascimento, Barreto, Antonio Carlos, Seraphim, Odivaldo José [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://rv.ifgoiano.edu.br/periodicos/index.php/gst/article/view/390; http://hdl.handle.net/11449/137457
• topic: Irrigation; Load loss; Connections; Irrigação; Perda de carga; Conexões

In the pumping pipelines the located load losses are very important since they have direct influence on hydraulic design of an irrigation system, especially regarding the concentric reducers used in the distribution lines. Hence this work was conducted in the Laboratório de Hidráulica do Centro Federal de Educação Tecnológica de Uberaba. We analyzed 03 concentric reducers PVC 75 x 50 mm, 50 mm and 35 x 35 x 1 "operating at different flow rates. The performance of the tests with the variation of flow in every situation possible to obtain equations to estimate the loss. The equation models presented a high setting, thus enabling the determination of the localized head loss in a situation closer to field reality. For the reduction of 75 x 50 x 35 mm and 50 mm at a flow rate 16.97 m³ h-1 the pressure drop reduction was obtained respectively 0.9263 and 2.7408 mca. To the reduction of 35 x 1 "at a flow rate of 6.02 m³ h-1 was obtained 2.9304 mca pressure drop reduction. The located losses produced by these reductions are relatively high and should be considered with great discretion in hydraulic design of the irrigation system.