Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/46277
Título: Methodology for Determining the Emitter Local Head Loss in Drip Irrigation Systems
Palavras-chave: Crossflow
Head loss (fluid mechanics)
Head (fluid mechanics)
Trickle irrigation
Irrigação por gotejamento
Fluxo cruzado
Perda de carga (mecânica dos fluidos)
Carga (mecânica dos fluidos)
Data do documento: Out-2020
Editor: American Society of Civil Engineers
Citação: FLORES, J. H. N. et al. Methodology for Determining the Emitter Local Head Loss in Drip Irrigation Systems. Journal of Irrigation and Drainage Engineering, Reston, v. 147, n. 1, Jan. 2021. DOI: https://doi.org/10.1061/(ASCE)IR.1943-4774.0001516.
Resumo: Precise estimation of local head loss (hl) remains a challenge for the hydraulic design of drip irrigation. This study develops a robust protocol for estimating the emitter hl based on the Borda-Carnot principle. The method requires cross-sectional flow area measurements with and without emitter obstruction and a contraction coefficient, which is determined by the empirical relationship of the obstruction ratio. For comparison purposes, cross-sectional flow areas were also measured with a profile projector, which resulted in absolute deviations lower than 2.6%. Observed and predicted single-emitter hl deviation values were consistent with previous studies; the three examined emitting pipe types had deviation values of −6.67%, 21.6%, and 1.07%. Thus, the proposed methodology for estimating the cross-sectional area can be applied without compromising hl estimates using a single flat inline emitter operated by the proposed semiempirical model.
URI: https://doi.org/10.1061/(ASCE)IR.1943-4774.0001516
http://repositorio.ufla.br/jspui/handle/1/46277
Aparece nas coleções:DEG - Artigos publicados em periódicos

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