Técnicas para extração de parâmetros de escoamentos bifásicos em regime intermitente utilizando o sensor Wire-Mesh
Gas-liquid two-phase flows occur in different industrial activities, such as in oil production and exploration where gas and oil flow simultaneously in pipe. Two-phase flow determines in many situations the conditions of efficiency and safety of equipment and processes where they occur. Thus, extrac...
| Autor principal: | Santos, Eduardo Nunes dos |
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| Formato: | Dissertação |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2015
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/1040 |
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| Resumo: |
Gas-liquid two-phase flows occur in different industrial activities, such as in oil production and exploration where gas and oil flow simultaneously in pipe. Two-phase flow determines in many situations the conditions of efficiency and safety of equipment and processes where they occur. Thus, extracting the flow characteristics and parameters from observations and experimental measurements is of great importance, allowing the study of phenomena and therefore leading to the optimization of the process involved. In particular, this work focused on the two-phase flow under intermittent flow regime which is commonly found in the industry and still needs investigation. A flow measurement technique known as wire-mesh sensor was applied with 8 x 8 electrodes configuration which produces images of the distribution of phases in the pipe cross section. Based on raw data from the sensor different visualization and data processing techniques were developed in order to extract features and parameters of intermittent flow. The techniques developed were based on methods of image processing such as segmentation and filtering. Experiments were performed in a horizontal experimental test facility with 9.2 m length of 26 mm inner diameter, whereby several operating conditions were generated and analyzed. The techniques developed have been validated through comparisons with high-speed camera and empirical mechanistic models available in the literature showing good agreement with reference values. The main contribution of this work is the development of a software for visualization and processing of wire-mesh sensor data, which may be employed for further two-phase flow studies. |
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