A Numerical Analysis of an Innovative Flow Ripple Reduction Method for External Gear Pumps

In this paper, an innovative solution to minimize noise emission, acting on the flow ripple, in a prototype External Gear Pump (EGP) is presented. Firstly, new tool capable completely simulate pump’s typologies, called EgeMATor, presented; hydraulic model, adopted for simulation, based lumped parameter method using control volume approach. Starting from pump drawing, thanks different subroutines developed environments interconnected, it possible analyze EGP. Results have been compared with outputs of three-dimensional CFD numerical model built up commercial code, already used success by authors. second section, reduce ripple implemented. This technology Alternative Capacitive Volumes (ACV) and works controlling uniformizing reverse flow, performing consistent reduction non-uniformity amplitude. particular, high notable frequency domain fundamental frequency. The easy accommodate housing, especially high-pressure components, helps reducing fluid-borne noise.