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research-article

Method for Fluid Flow Simulation of a Gerotor Pump using OpenFOAM

[+] Author and Article Information
Robert Castilla

LABSON Universitat Politècnica de Catalunya Terrassa, Spain
robert.castilla@upc.edu

Pedro Javier Gamez-Montero

LABSON Universitat Politècnica de Catalunya Terrassa, Spain
pedro.javier.gamez@upc.edu

Gustavo Raush

LABSON Universitat Politècnica de Catalunya Terrassa, Spain
gustavo.raush@upc.edu

Esteve Codina Macia

LABSON Universitat Politècnica de Catalunya Terrassa, Spain
ecodina@mf.upc.edu

1Corresponding author.

ASME doi:10.1115/1.4037060 History: Received March 15, 2017; Revised June 06, 2017

Abstract

A new approach based on the open source tool OpenFOAM is presented for the numerical simulation of a mini gerotor pump working at low pressure. The work is principally focused on the estimation of leakage in the clearance disk between pump case and gears. Two main contributions are presented for the performance of the numerical simulation. On one hand, a contact point viscosity model is used for the simulation of solid-solid contact between gears, in order to avoid the teeth tip leakage. On the other hand a new boundary condition for the gear mesh points motion has been implemented in order to keep the mesh quality while moving gears with relative velocity. The results have been compared with experimental measurement and a good agreement in volumetric efficiency and pressure fluctuations have been found. Finally the leakage flow in the clearance disk has been analyzed.

Copyright (c) 2017 by ASME
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