Visualization of Leakage Flow Through Active Contacts in Toothed External Gear Pumps - CFD and Photo Imaging Techniques

Sahoo, Vineet; Mukherjee, Udayaditya; Das, Manab Kumar; Maiti, Rishi; Antoniak, Piotr; Stryczek, J.; Rodionov, Leonid

doi:10.1615/jflowvisimageproc.2017019580

Cited by 6 publications

(4 citation statements)

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“…TRPIV results were compared with numerical results, and good agreement was obtained (see Figure 16). Continuous research on the visualization of trochoidal gears has been carried out, and the works to be pointed out are Sahoo et al [102] and Antoniak and Stryczek [103]. Finally, in 2018, a very innovative experimental visualization work was presented in a conference by Antoniak et al [104].…”

Section: Visualization Techniquesmentioning

confidence: 99%

A Review of Gerotor Technology in Hydraulic Machines

2019

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Over the years, numerous investigations have established the gerotor fundamentals. This work aims to provide a complete review of the literature from the last decade, focusing on the articles published in the past five years on gerotor technology in hydraulic machines. The report gives a catalogue of guidelines based on the trochoidal-envelope definition, a background analysis, the worldwide distribution of articles in each continent and country and the most frequently used keywords in the field. The paper identifies state-of-the-art research, and reports on current mainstream ideas. From the historical background, this literature review reports the current approaches in gerotor pumps (geometry and performance approaches, modeling and numerical simulations), orbital motors and new concepts. The report will serve as a guide and a directory for novel engineers working with gerotor technology in hydraulic machines. Another intention of this paper is to disseminate the works of the researchers who use this technology around the world, and to provide a scenario for future international collaboration. The paper gives an account of the disparity between academia and engineering applications. There is currently very little published literature on design and production methodologies for gerotor pumps and orbital motors. Hence, the future goal is to collect recommendations that combine academia and industry expertise to make better use of these extensive studies in the field.

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Section: Visualization Techniquesmentioning

confidence: 99%

A Review of Gerotor Technology in Hydraulic Machines

2019

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“…The course of the hydrodynamic cavitation phenomenon is presented on the basis of [15,25,26] in Fig. 1, on the right.…”

Section: -Zone (E)mentioning

confidence: 99%

“…The PIV visualization method can be used to observe and investigate the cavitation phenomena. The essentials of this method are presented in [23], and the appropriate research system and the observation method are shown in [24,25].…”

Section: Introductionmentioning

confidence: 99%

Research into ultrasoic and hydrodinamic cavitation phenomena in a hydraulic system

Stryczek

Antoniak

Banaś

et al. 2021

M&AT

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The article describes the course of the ultrasonic cavitation in a hydraulic tank and the hydrodynamic cavitation in a gear pump. The course of those phenomena was confirmed in experimental tests carried out with the use of a tank and a pump made of transparent plastics. It has been proved that the oscillator-cavitation system made according to the original project is useful to induce the phenomenon of ultrasonic cavitation. It has also been shown that the PIV visualization method, consisting in a special system of illuminating transparent objects and recording the flow through those objects with a fast camera, is useful for the studying of the cavitation phenomena. A visible interaction between the ultrasonic and the hydrodynamic cavitation was observed. The induction of ultrasonic cavitation in the tank causes degassing of the oil, and the degassed oil supplying the pump reduces the hydrodynamic cavitation in its internal channels and clearances. This is an example of beneficial effects of the ultrasonic cavitation on the operation of a pump and a hydraulic system. The presented work is an example of effective co-operation between the communities of Wroclaw University of Science and Technology and Igor Sikorsky Kiyv Politechnic Institute, National Technical University of Ukraine.

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“…A discovery to experimentally evaluate flow characteristics in hydrostatic pump work has been noted by. [27][28][29][30][31] Recently, Roy et al 32 have done leakage flow investigation at different angular positions of pump rotors using CFD and photo imaging techniques. The analysis is limited to a gerotor pump at a specific speed.…”

Section: Introductionmentioning

confidence: 99%

Inter-chamber leakage flow through the transition contacts in epitrochoid generated star and ring hydrostatic units

Pradhan

Sahoo

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The current study examines the impact of tooth clearance on the flow performance at the location of transition contact of the internal positive displacement trochoidal gear pump. The aim is to enhance the volumetric efficiency, which is caused by internal leakage due to tooth clearance. Two clearance models, that is, form closed and interference (forced closed) models of the pump help to elucidate the leakage phenomenon through which optimal volumetric efficiency can be achieved. Finite element investigation comprises the static structural analysis followed by 3D CFD analysis carried out for the study. The CFD model includes the contact deformations of external trochoidal gear due to the application of maximum pressure, which increases the inter-chamber leakage. Fluid velocity and pressure inside the pump have been predicated to understand the flow dynamics inside the pump. The simulation results were matched to theoretical values, and this shows a very excellent match. The volumetric efficiency of 89% with less than 1 gm/s of leakage has been achieved at a speed of 2500 rpm. Moreover, the simulation results show an increase in discharge flow with the interference model. Further, an empirical relation is established between volumetric efficiency, fluid density, and rotor speed using partial least square regression analysis.

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Visualization of Leakage Flow Through Active Contacts in Toothed External Gear Pumps - CFD and Photo Imaging Techniques

Cited by 6 publications

References 0 publications

A Review of Gerotor Technology in Hydraulic Machines

A Review of Gerotor Technology in Hydraulic Machines

Research into ultrasoic and hydrodinamic cavitation phenomena in a hydraulic system

Inter-chamber leakage flow through the transition contacts in epitrochoid generated star and ring hydrostatic units

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