On the assessment of lumped parameter models for gear pump performance prediction

Battarra, Mattia

doi:10.1016/j.simpat.2019.102008

Cited by 20 publications

(12 citation statements)

References 17 publications

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“…In the last two decades, numerous studies are performed to investigate the output fluctuations and the efficiency of external gear pumps. These studies can mainly be categorized in theoretical approaches, [ 1–4 ] lumped parameter models, [ 5–17 ] and computational fluid dynamics (CFD) models. [ 18–27 ] Recently, even phenomena such as axial balance, turbulence, and cavitation are incorporated in the models.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modeling of a Viscous Fluid Flowing through an External Gear Pump

Bie

Hulsen

Anderson

2020

Macro Theory & Simulations

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Gear pumps are frequently used for the transport of high‐viscosity fluids, for instance, for the extrusion of polymers. The flow rate of this extrusion process is regularly controlled by an external gear pump. In this work, the 2D flow of a viscous fluid through such an external gear pump is studied using the finite element method. Local mesh refinement based on the respective distance between moving boundaries is essential to capture the relatively narrow clearances in the pump. The gear pump works against the pressure driven flow, therefore its performance is strongly dependent on material and processing parameters. The flow of Newtonian and shear‐thinning fluids through the external gear pump is studied for a range of processing conditions. Pump curves are obtained that display the volumetric efficiency against the Hersey number, which is defined as viscosity times rotation speed divided by pressure difference over the pump. Analysis of the residence time of the fluid in the pump, shows that vortices are present in the inflow channel causing material to remain in the pump for longer times.

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Section: Introductionmentioning

confidence: 99%

Finite Element Modeling of a Viscous Fluid Flowing through an External Gear Pump

Bie

Hulsen

Anderson

2020

Macro Theory & Simulations

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“…• Level of reliability of the numeric model could be confirmed with the study based on the statistical approach. Such an approach was demonstrated by Battarra and Mucchi (2020), who used LP model and experimental results for quantitative analysis of 20 nominally identical gear pumps. • Specific flow conditions related to TMC principle can lead to cavitation on unknown locations.…”

Section: Discussionmentioning

confidence: 99%

Development of CFD-based procedure for 3d gear pump analysis

Munih

Hočevar

Petrič

et al. 2020

Engineering Applications of Computational Fluid Mechanics

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Tumbling Multi-Chamber (TMC) gear pump is a generally unknown type of hydraulic device, which features a unique three-dimensional shape of the gears. The main benefits of such design over the conventional gear pumps are self-adapting tightness of the pump parts, the possibility to mold the parts from a polymer material and high volumetric efficiency, considering the simplicity of the design. The specific working principle of TMC pumps requires a slightly different approach to the numeric modeling and analysis process compared to the conventional gear pump types (e.g. external gear and gerotor pumps). One of the main contributions of the work is the development of an analysis procedure, which allows studying flow and pressure conditions in the TMC pump. This includes the influence of the positioning of the pump parts on spatial and temporal variations in sealing regions and the influence of pressure field propagation in relation to the valve plate position.

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“…Therefore, these methods provide less detailed results than the CFD method, but offer a great advantage in terms of required computational resources. However, as highlighted in Battarra and Mucchi 2 and Paltrinieri et al, 3 , lumped parameter models permit good agreement between numerical and experimental results, as well as understanding the interaction between the main components of the system. Furthermore, Mucchi et al, 4,5 Vacca and Guidetti, 6 Rundo and Altare, 7 and Corvaglia and Rundo 8 reveal the possibility to obtain reliable results, close to 3-D CFD models, not only when modelling portions or whole systems, but also by creating 0-D models of some components, such as oil pumps.…”

Section: Introductionmentioning

confidence: 89%

A lumped parameter approach for the filling analysis of V6 engine lubrication systems

Polastri

Storchi

Battarra

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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The present work describes a lumped parameter approach for the filling analysis of engine lubrication systems. Filling analyses are typically carried out by means of multi-phase 3-D CFD models but, despite allowing detailed and reliable results, they require very demanding computational capabilities. Based on these premises, the authors present a modelling procedure to address the topic by means of a lumped parameter approach. By introducing a detailed modelling technique, the proposed method offers the possibility to reproduce not only the common and simple elements such as pipes and bends, but also permits the discretization of complex three-dimensional fluid domains. The proposed approach has been applied to the lubrication system of a heavy-duty V6 engine: since long stop intervals are planned during the engine lifetime, the filling time of the system plays a fundamental role. The analysis has been run with the obtained 0-D model, simulating at different lubricant temperature. The predictive capabilities of the numerical model are presented in terms of flow pattern and filling time of the circuit branches. The simulation has also been performed by means of a 3-D CFD model, providing the possibility of a result comparison: since this methodology is nowadays considered the state of the art for this kind of analyses, the results are taken as reference to evaluate the capabilities of the proposed 0-D approach. The comparative analysis concerns both the overall distribution of the lubricant over time, and the local phenomena. The differences in terms of computational effort are considered as well, to assess the approximation of the lumped parameter approach with respect to the complex but more accurate three-dimensional models. The results highlight the accuracy of the methodology on the estimation of the filling time. Moreover, the proposed procedure reveals great advantages in terms of computational effort.

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On the assessment of lumped parameter models for gear pump performance prediction

Cited by 20 publications

References 17 publications

Finite Element Modeling of a Viscous Fluid Flowing through an External Gear Pump

Finite Element Modeling of a Viscous Fluid Flowing through an External Gear Pump

Development of CFD-based procedure for 3d gear pump analysis

A lumped parameter approach for the filling analysis of V6 engine lubrication systems

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