Experimentation and 2D Fluid Flow Simulation over an External Gear Pump

Adake, Dhananjay G; Dhote, Nihal D; Khond, Mohan P

doi:10.1088/1742-6596/2601/1/012029

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…The simulation results were obtained in the form of characteristics presenting the flow rate as a function of the pressure q(∆p) and the flow rate as a function of the time q(t). These functions correspond to those published by other authors [23,26,33,40,52,53].…”

Section: Discussionsupporting

confidence: 90%

CFD Modeling and Experimental Validation of the Flow Processes of an External Gear Pump

Mitov,

Nikolov,

Nedelchev

et al. 2024

Processes

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This article presents computational fluid dynamics (CFD) modeling of the flow processes at a certain specimen of an external gear pump. The purpose of the developed two-dimensional (2D) CFD model is to carry out a numerical study to obtain the main characteristics of the pump flow rate, especially the flow rate as a function of the pressure and the flow rate as a function of the time. A numerical study was carried out at forty-two different operating modes that were expressed as a variation of two parameters: rotational frequency (950–1450 min−1) and pressure (5–150 bar). The validation of the numerical results was carried out through an experimental study. For this purpose, a laboratory experimental setup equipped with a modern data acquisition (DAQ) system was designed and implemented. It allows the gear pump to be tested at the same operating modes as the numerical study. A validation analysis was performed by comparing the numerical and experimental results using the average relative error index (FIT). A detailed description of the 2D CFD model development (CAD model, mesh, general settings, boundary conditions, etc.) is provided. Based on the 2D CFD model, an original methodology was proposed to take into account the influence of the discharge channels on the displacement volume of the pump by adjusting the face width of the gears. Despite the limitations of the simple 2D CFD model, which are discussed in this article, a very good match between numerical and experimental results is analyzed by calculating the FIT level, which is in the range of 93–97%.

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Section: Discussionsupporting

confidence: 90%

CFD Modeling and Experimental Validation of the Flow Processes of an External Gear Pump

Mitov,

Nikolov,

Nedelchev

et al. 2024

Processes

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show abstract

“…Focused parameter modeling provides information on the details of localized fluid flow, such as flow jets and cavitation formation sites, in addition to predicting basic pressure and flow characteristics throughout the plant [25][26][27]. Therefore, fluid flow modeling using CFD analysis was applied to the design of the multi-gear pump.…”

Section: Introductionmentioning

confidence: 99%

Improving the Design of a Multi-Gear Pump Switchgear Using CFD Analysis

Zharkevich,

Nikonova,

Gierz

et al. 2024

Applied Sciences

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Gear pumps are hydraulic machines capable of transferring energy and performing work in pumping fluid. This study presents an analysis of the hydrodynamic model of an external multiple gear pump in order to analyze the fluid flow in combinations of single and different viscosities at the same and different pressures and speeds. Solidworks Flow Simulation 2016 was used to analyze fluid flow. When the radius of the rounding on the collector inner surface is increased from 3 to 15 mm, the pressure drop decreases by 13%. When the radius of the manifold is 3 mm, cavitations are observed. With a liquid distribution system with four input ports and one outlet port in the top cover, the gear pump can handle liquids of viscosity classes 5 to 10. The speed should not exceed 1200 rpm if the liquid has a kinematic viscosity of 10 cSt. The pressure drop and velocity distribution of the liquid in the pressure and suction lines are the same. When the speed changes from 400 to 1200 rpm, the pressure drop increases five times, and the velocity increases three times. At a constant speed of 1000 rpm and an inlet pressure of 10 MPa but with different viscosities, the pressure drop decreases 8 times, and the speed increases 1.5 times. When the inlet pressure is 6 to 24 MPa, with constant speed and the same viscosity, the pressure drop and fluid velocity practically do not change. The dependence of pressure drop on the number of revolutions and radius of the rounding of the inner surface of the collector is statistically significant.

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“…Creating a CFD model of newly designed or existing hydraulic machines (volumetric or turbo) is not an easy task and depends directly on the purpose for which it will be used [45,46]. The main question to consider is whether to create a two-dimensional (2D) or three-dimensional (3D) model [47][48][49][50][51]. The answer depends on whether it is possible to create a 2D model that gives results very close to the 3D model while using significantly less computational resources.…”

Section: Introductionmentioning

confidence: 99%

Advanced 2D Computational Fluid Dynamics Model of an External Gear Pump Considering Relief Grooves

Nikolov,

Mitov,

Kralov

2024

Applied Sciences

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The article presents an advanced two-dimensional (2D) computational fluid dynamics (CFD) model of an external gear pump which considers relief grooves. Relief grooves are limiting design features for the flow process of this type of pump, and their influence in existing studies is considered by a three-dimensional (3D) model only. The structural modification proposed by the authors is beyond the possibilities of real implementation, but it gives the possibility to precisely model the pump’s design features. In contrast to the existing studies (using 3D CFD), the proposed advanced 2D model requires significantly fewer computing resources. Numerical experiments were carried out using the 2D model at different pump operating modes depending on the rotation frequency (950–1450 min−1) and pressure load (5–150 bar). The numerical results were validated by a real-world experiment for the same pump operating modes using an existing laboratory experimental setup. An analysis of the CFD model and real experiment results was carried out by determining a quantitative index of match (FIT), which varies in the range of 97.93–99.82%. This proves the performance of the proposed CFD model, which can be further used as a part of more complex hydraulic systems models.

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Experimentation and 2D Fluid Flow Simulation over an External Gear Pump

Cited by 4 publications

References 12 publications

CFD Modeling and Experimental Validation of the Flow Processes of an External Gear Pump

CFD Modeling and Experimental Validation of the Flow Processes of an External Gear Pump

Improving the Design of a Multi-Gear Pump Switchgear Using CFD Analysis

Advanced 2D Computational Fluid Dynamics Model of an External Gear Pump Considering Relief Grooves

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