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ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL EVALUATION OF THE TWO-PHASE FLOW IN A RADIAL CENTRIFUGAL PUMP
Submission Author:
Rafael Dunaiski , PR , United States
Co-Authors:
Carlos Eduardo Ribeiro Santa Cruz Mendoza, Rafael Dunaiski, Edgar Ofuchi, Henrique Stel, Rigoberto Morales
Presenter: Rafael Dunaiski
doi://10.26678/ABCM.ENCIT2018.CIT18-0651
Abstract
Centrifugal pumps are often used for the transportation of fluids with more than one phase. However, the presence of a gaseous phase can lead to severe performance degradation. In this work a numerical study using Ansys® CFX® to simulate the two phase flow in a radial centrifugal pump Imbil® Itap 65-330/2 is performed. Water and air were used as work fluids, and an Euler-Euler approach was employed alongside with the MUSIG model, which provides a population balance that accounts the break up and coalescence phenomena of the gas bubbles inside the pump. The results were validated through comparisons with the experimental data obtained by Cubas (2017). The numerical model was capable of predicting the pump degradation due to the presence of gas. Also, the flow patterns and the general behavior of the phases were successfully reproduced.
Keywords
centrifugal pump, CFD, MUSIG, Two-phase Flow
