Abstract
One of the important accessories of the lubrication system of an aero-engine is the oil pump which consists of multiple pumps with tandem gerotor elements housed in a single casing. This paper presents the volumetric efficiency variation of a single-stage gerotor pump specially designed for aero-engine by conducting experiments at on and off-design conditions and comparing it with the CFD analysis. A Gerotor pump having fixed geometrical parameters designed based on a athematical 1D model using MatLab and AMESim is manufactured and tested. Performance evaluation of these pumps for pressure and temperature has been discussed in this paper. Commercial CFD code ANSYS-Fluent with a standard k- ε turbulence model has been used for performance evaluation of gerotor pump. Flow characteristics studies on the prototype pump indicate that simulation results closely matched the experimental data. The study concludes that the simulation method adopted is appropriate for predicting the performance of the gerotor pump and the contribution of outlet pressure to the pump volumetric efficiency is significant.
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