Experimentos numéricos de um loop de gás úmido para estimativa da sobreleitura em placas de orifício: avaliação dos parâmetros governantes

• Ano de defesa: 2016
• Autor(a) principal: Marochio, Elias Antonio Gomes Coelho
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Mecânica; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Mecânica
• Palavras-chave em Português: Orifice plate; Wet gas; Overreading; CFD; Gás úmido; Placa de orifício; Sobreleitura; Medidores de fluxo; Gás natural; Fluidodinâmica computacional; Mecânica dos fluídos; Engenharia Mecânica; 621
• Link de acesso: http://repositorio.ufes.br/handle/10/9741

Flow measurement systems for differential pressure are widely industrial solutions, withthe orifice plate being the oldest element but still widely used. The accuracy of thesesystems is a fundamental requirement due to increasing demands of standards, regulationsand the requiriment to reduce production costs. In single-phase flow, the parameters forflow measurement are well-defined. However, in wet gas flow, the conditions are changeddue to the presence of a liquid phase in the gas flow, causing an overreading in thegas measurement. This paper proposes an evaluation of empirical correlations for gasflow correction, and an analysis of the influence parameters using the ComputationalFluid Dynamics (CFD). The evaluation of four correlations was performed using theexperimental data from Murdock (1962), and then compared with each other. The James(1965) correlation showed higher accuracy for the steam-water flow, and the Murdock (1962)correlation for air-water and natural gas-water, besides an evaluation of the operatingconditions of these correlations was performed. Furthermore, this paper also compared theinfluence parameters via the CFD to neglected by empirical correlations, being observedthat the parametersβ, Frl and the operating pressure influence overreading