Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Development of a Particle Tracking Velocimetry (PTV) measurement technique for the experimental investigation of oil drops behavior in dispersed oil-water two-phase flow within a centrifugal pump impeller
Submission Author:
Rafael Franklin Lazaro de Cerqueira , SC
Co-Authors:
Rafael Franklin Lazaro de Cerqueira, Rodolfo Perissinotto, William Monte Verde, Jorge Luiz Biazussi, Marcelo Souza de Castro, Antonio Bannwart
Presenter: Rafael Franklin Lazaro de Cerqueira
doi://10.26678/ABCM.COBEM2021.COB2021-1047
Abstract
The objective of the current work is to present the development of a robust Particle Tracking Velocimetry (PTV) software for the analysis of the behaviour of oil drops in an oil-water two-phase flow within a centrifugal pump impeller. The tracking was performed through high-speed camera acquisitions in a transparent pump prototype, which enabled the visualization of oil drops dispersed in water in all the impeller channels. The PTV software is based on an U-NET and standard convolutional networks, which detect the oil drop contours in each frame of the high-speed camera videos. In order to assess the PTV software capabilities, a single experiment was analyzed in detail. In this experiment, due to the pump rotation speed and the water flow rate, intense transient fluctuations on the dispersed oil size distribution were observed in the recorded acquisitions. This procedure completely characterized the instantaneous drop dynamics in the pump impeller. According to the results, there is a strong dependence between the oil injection flow rate, the instantaneous drop size distribution, and the average velocity field.
Keywords
PTV, centrifugal pump, oil drop, two-phase liquid-liquid flow
