Avaliação experimental do comprimento de desenvolvimento de escoamentos em golfadas a partir de diferentes condições de entrada

• Ano de defesa: 2019
• Autor(a) principal: Castilho, Jéssica de Souza Silva
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio de Janeiro; Brasil; Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia; Programa de Pós-Graduação em Engenharia Mecânica; UFRJ
• Palavras-chave em Português: Escoamento em golfadas; Escoamento completamente desenvolvido; Escoamento bifásico; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: http://hdl.handle.net/11422/13787

In the present work, horizontal slug gas-liquid flows were studied with a view to assess the effects of gas entrance on the flow properties. The tests resorted to different gas and liquid flow rates and to four different types of gas injectors. The measurements characterized the the properties of the liquid slug and the long bubbles. To quantify the behavior of frequency of slug passage, velocity and the size of bubbles generated in the gas injection, an electro-resisitivity sensor was used. The open horizontal circuit consisted of a transparent acrylic tube with 41 m in length and 44.2 mm internal diameter. The tests were carried out for liquid superficial velocities in the range 0.6 and 1 ms−1 and gas superficial velocities in the range 2 and 4 ms−1 . A combination of six experimental conditions were studied. The liquid and gas used in the present study were water and compressed air. The statistical distributions of the flow properties are reported.