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COBEM 2019
25th International Congress of Mechanical Engineering
NUMERICAL AND EXPERIMENTAL STUDY OF GAS-LIQUID FLOWS IN A CENTRIFUGAL ROTOR
Submission Author:
Edgar Ofuchi , PR
Co-Authors:
Henrique Stel, Edgar Ofuchi, Jhoan M.C. Cubas, Rafael Fabricio Alves, Rigoberto Morales
Presenter: Edgar Ofuchi
doi://10.26678/ABCM.COBEM2019.COB2019-1247
Abstract
This work presents a numerical and experimental study of gas-liquid flows in a centrifugal rotor. The numerical model is based on the Two-Fluid Model and a polydispersed approach, accounting for the effect of several two-phase flow interactions, including bubble breakup and coalescence. The model is compared with an experimental loop designed to evaluate pressure rise curves and flow pattern visualization in the centrifugal rotor. Association of images from the experiments with the behavior of the pressure rise curves reveal the existence of several, well distinct two-phase flow patterns that significantly affect the performance of the centrifugal rotor. Comparison of numerical results with the experimental data yield good agreement for both performance parameters and flow patterns. In particular, the numerical model is able to capture the abrupt drop of the pressure rise curve associated with the formation of gas pockets in the rotor channels, as well as the bubble size distribution resulted from the bubble breakup and coalescence interactions. Outcomes from this work could help further understanding of the complex gas-liquid flow behavior inside turbomachines, a topic that is of interest in important industrial processes such as safety of nuclear plants and petroleum production.
Keywords
Numerical simulation, experimental, Gas-Liquid Flow, centrifugal pump
