1. Computational Fluid Dynamics Modeling of Gaseous Cavitation in Lubricating Vane Pumps: An Approach Based on Dimensional Analysis
- Author
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Michele Pinelli, Umberto Stuppioni, Alessio Suman, and Alessandro Blum
- Subjects
Materials science ,business.industry ,020209 energy ,Mechanical Engineering ,02 engineering and technology ,Mechanics ,Computational fluid dynamics ,release ,NO ,020303 mechanical engineering & transports ,gas, release, flow ,0203 mechanical engineering ,Computational fluid dynamics modeling ,Cavitation ,gas ,flow ,0202 electrical engineering, electronic engineering, information engineering ,Engineering simulation ,business - Abstract
This paper addresses the problem of computational fluid dynamics (CFD) modeling of gaseous cavitation (GC) in lubricating positive-displacement pumps (PDPs). It is important for designers and analysts to predict the dynamic features of air release/dissolution processes which characterize this phenomenon, along with their effects on filling capability and noise-vibration-harshness behavior of the machine. The focus is on the empirical tuning of the commercial homogeneous-flow cavitation model known as dissolved gas model (DGM). Considering an automotive case study of a balanced vane pump (BVP), the effects of air modeling on numerical predictions of discharge flow/pressure ripple and volumetric efficiency have been studied. The tuning time parameters of the model have been correlated to the machine Reynolds number as part of a simplified theoretical background based on dimensional analysis. Considering experimental data at different operating conditions, the tuned model has shown a good capacity in predicting the pressure ripple and the flowrate at the discharge of the pump.
- Published
- 2020