Numerical simulation of turbulent flow in the suction chamber of a gearpump using deforming mesh and mesh replacement
TL;DR: In this article, the evolution of the boundaries of the domain is very complex, and an arbitrary Lagrangian-Eulerian (ALE) formulation is used with mesh deformation and local remeshing.
About: This article is published in International Journal of Mechanical Sciences.The article was published on 2010-10-01. It has received 67 citations till now. The article focuses on the topics: Laminar flow & Turbulence.
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TL;DR: In this article, a review of the different methodologies used in the last years for the simulation of the flow rates generated by Gerotor, external gear and crescent pumps is presented.
Abstract: Gear pumps represent the majority of the fixed displacement machines used for flow generation in fluid power systems. In this context, the paper presents a review of the different methodologies used in the last years for the simulation of the flow rates generated by gerotor, external gear and crescent pumps. As far as the lumped parameter models are concerned, different ways of selecting the control volumes into which the pump is split are analyzed and the main governing equations are presented. The principles and the applications of distributed models from 1D to 3D are reported. A specific section is dedicated to the methods for the evaluation of the necessary geometric quantities: analytic, numerical and Computer-Aided Design (CAD)-based. The more recent studies taking into account the influence on leakages of the interactions between the fluid and the mechanical parts are explained. Finally the models for the simulation of the fluid aeration are described. The review brings to evidence the increasing effort for improving the simulation models used for the design and the optimization of the gear machines.
76 citations
69 citations
TL;DR: This work highlights the development history and focuses particularly on the research of piezoelectric pumps in four aspects: configuration design, working mode, optimization and application, respectively, and attempts to provide both a guidance for piezOElectric pump researchers on improving their output performances and a resource for those outside the field who wish to identify the best piezoeselectric pump for a particular application.
66 citations
TL;DR: In this article, an integrated Reverse Engineering and Computational Fluid Dynamics (RE/CFD) methodology is applied in order to study the adaptation of a commercial scroll compressor to be used as an expander in a micro ORC system.
48 citations
TL;DR: In this article, a study on the internal fluid dynamic of a high-pressure external gear pump is described, where the pump has been analyzed with both numerical and experimental techniques, and the results like the volumetric efficiency, absorbed torque, and outlet pressure ripple have been compared with the experimental data.
Abstract: A study on the internal fluid dynamic of a high-pressure external gear pump is described in this paper. The pump has been analyzed with both numerical and experimental techniques. Starting from a geometry of the pump, a three-dimensional computational fluid dynamics (CFD) model has been built up using the commercial code PumpLinx®. All leakages have been taken into account in order to estimate the volumetric efficiency of the pump. Then the pump has been tested on a test bench of Casappa S.p.A. Model results like the volumetric efficiency, absorbed torque, and outlet pressure ripple have been compared with the experimental data. The model has demonstrated the ability to predict with good accuracy the performance of the real pump. The CFD model has been also used to evaluate the effect on the pump performance of clearances in the meshing area. With the validated model the pressure inside the chambers of both driving and driven gears have been studied underlining cavitation in meshing fluid volume of the pump. For this reason, the model has been implemented in order to predict the cavitation phenomena. The analysis has allowed the detection of cavitating areas, especially at high rotation speeds and delivery pressure. Isosurfaces of the fluid volume have been colored as a function of the total gas fraction to underline where the cavitation occurs.
48 citations
Cites background from "Numerical simulation of turbulent f..."
...However, for the study of pumps like external gear ones, even if the 2D modeling approaches give interesting results, they cannot predict the internal flow behavior like 3D models [9,10]....
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...[10] did an interesting study on external gear pumps using a three-dimensional approach (with an immersed solid method)....
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References
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TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
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