Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/50069
Título: Comportamento hidráulico de registros de gaveta, esfera e pressão
Título(s) alternativo(s): Hydraulic behavior of gate, ball and pressure valves
Autores: Thebaldi, Michael Silveira
Thebaldi, Michael Silveira
Deus, Fábio Ponciano de
Faria, Lessandro Coll
Baptista, Victor Buono da Silva
Palavras-chave: Acessórios das tubulações
Condutos forçados
Dimensionamento hidráulico
Instalações hidráulicas
Número de Reynolds
Velocidade média de escoamento
Pipeline accessories
Pressurized pipes
Hydraulic design
Water supply systems
Reynolds number
Average flow velocity
Data do documento: 31-Mai-2022
Editor: Universidade Federal de Lavras
Citação: NHÁMUSSUA, S. M. S. Comportamento hidráulico de registros de gaveta, esfera e pressão. 2022. 82 p. Dissertação (Mestrado em Recursos Hídricos) - Universidade Federal de Lavras, Lavras, 2022.
Resumo: Valves are accessories that establish, control and block the flow at a pipeline; therefore, they must be chosen carefully, not only due to their physical characteristics, but also because of their operational and hydraulic behavior. Thus, the objective of this work was to evaluate the hydraulic behavior of gate, ball and pressure valves. Flowrate evaluations were carried out with four openings (25%, 50%, 75% and 100%) of the tested valves, with five replications. To estimate the major head losses, a differential "U" tube mercury manometer was used, without the presence of a valve. The calculation of the minor head loss (hfL) was performed by measuring the values of the total head loss (hfT) in the section where the valve was located, from the subtraction of the major head loss (hfC) and other accidental losses, by the presence of other accessories. Average values of the coefficient "K" of minor head loss were estimated, as well as the Equivalent Length (Leq). In addition, mathematical models were fitted to determine the head loss coefficients (K and Leq), using the Reynolds number (Re) and average flow velocity in the pipe section as independent variables. For the estimative of the tested valves coefficients, higher values were obtained in the 25% openings due to the smaller section area and the lower flow velocity. For 100% and 75% openings, the lowest values were obtained. When analyzing the models for estimating the variables related to the minor head loss, the independent variable flow velocity, in general, led to a better estimate compared to the Reynolds number.
URI: http://repositorio.ufla.br/jspui/handle/1/50069
Aparece nas coleções:Recursos Hídricos - Mestrado (Dissertações)

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