Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
ESTIMATION OF THE DISSIPATION RATE IN A CENTRIFUGAL PUMP IMPELLER BY USING PIV
Submission Author:
William Denner Pires Fonseca , SP
Co-Authors:
William Denner Pires Fonseca, Rodolfo Perissinotto, Rafael Franklin Lazaro de Cerqueira, William Monte Verde, Marcelo Souza de Castro, Erick de Moraes Franklin
Presenter: William Denner Pires Fonseca
doi://10.26678/ABCM.COBEM2023.COB2023-0186
Abstract
The dissipation rate of the turbulent kinetic energy is a key parameter in centrifugal pumps and its local values may have a strong influence on the performance of these devices. Recent technology advancements in particle image velocimetry (PIV) technique have made it possible to study complex turbulent flows at a wide range of scales. In this work, experiments using a time-resolved PIV system were carried out to evaluate characteristics of a turbulent flow, mainly the turbulence dissipation rate, for different operating conditions of a centrifugal pump impeller. In order to overcome the limited spatial resolution constraint, the large-eddy PIV method is used to obtain the dissipation rate. In the large-eddy PIV method, it is assumed that the motion of larger scales is measured by the PIV technique, while the smallest scales (unresolved scales) are modeled by a sub-grid scale model, computed from the strain-rate tensors obtained from the measured fields.
Keywords
Turbulent dissipation rate, centrifugal pump, Particle image velocimetry, Large-eddy PIV
