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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Performance of models to determine flow rate using orifice plates

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Author(s):
Nicolas D. Cano [1] ; Antonio P. de Camargo [2] ; Gustavo L. Muniz [3] ; Jonesmar de Oliveira [4] ; José G. Dalfré Filho [5] ; José A. Frizzone [6]
Total Authors: 6
Affiliation:
[1] Universidade Estadual de Campinas. Faculdade de Engenharia Agrícola. Laboratório de Hidráulica e Irrigação - Brasil
[2] Universidade Estadual de Campinas. Faculdade de Engenharia Agrícola. Laboratório de Hidráulica e Irrigação - Brasil
[3] Universidade Estadual de Campinas. Faculdade de Engenharia Agrícola. Laboratório de Hidráulica e Irrigação - Brasil
[4] Universidade Estadual de Campinas. Faculdade de Engenharia Agrícola. Laboratório de Hidráulica e Irrigação - Brasil
[5] Universidade Estadual de Campinas. Faculdade de Engenharia Civil, Arquitetura e Urbanismo. Laboratório de Hidráulica - Brasil
[6] Universidade de São Paulo. Escola superior de Agricultura “Luiz de Queiroz”. Faculdade de Engenharia Agrícola - Brasil
Total Affiliations: 6
Document type: Journal article
Source: Revista Brasileira de Engenharia Agrícola e Ambiental; v. 25, n. 1, p. 10-16, 2020-11-30.
Abstract

ABSTRACT This study aimed to evaluate three methodologies for orifice-plate water-flow estimation by quantifying errors in the flow determinations to propose an appropriate measurement range for each evaluated condition. Two orifice-plate models (nominal diameters of 100 and 150 mm) with 50% restriction in the flow section were evaluated. In the theoretical equations, the discharge coefficient was obtained using the Reader-Harris/Gallagher equation (Method 1) and approximated from experimental data using the angular coefficient of a zero-intercept straight line (Method 2). The recommended measurement ranges for errors that were lower than 5% for the 100 and 150 mm plates were 30 to 65 m3 h-1 and 70 to 130 m3 h-1 using the theoretical equation and 20 to 65 m3 h-1 and 40 to 130 m3 h-1 using the empirical equation, respectively. The Reader-Harris/Gallagher equation (Method 1) adequately estimated the discharge coefficient of the orifice plates; however, the use of empirical equations (Method 3) demonstrated smaller measurement errors and greater rangeability of the evaluated flow meters. (AU)

FAPESP's process: 18/20099-5 - Clogging processes of irrigation drippers due to interactions of calcium carbonate and solid particles
Grantee:Antonio Pires de Camargo
Support Opportunities: Regular Research Grants