Numerical simulation of three-dimensional external gear pump using immersed solid method

External gear pumps are typically used as positive displacement machines that are capable of developing high pressures while operating at low suction pressures in hydraulic systems. Considerable attention has paid recently been given to investigating the flow characteristics and enhancing pump effic...

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Bibliographic Details
Published in:Applied thermal engineering 2017-05, Vol.118, p.539-550
Main Authors: Yoon, Yonghan, Park, Byung-Ho, Shim, Jaesool, Han, Yong-Oun, Hong, Byeong-Joo, Yun, Song-Hyun
Format: Article
Language:English
Subjects:
3-D technology
Cavitation
Computational fluid dynamics (CFD)
Computer simulation
Design parameters
Efficiency
External gear pump
Flow characteristics
Flow rate
Flow velocity
Fluid flow
Gear pumps
Hydraulic equipment
Immersed solid method (ISM)
Internal flow
Internal pressure
Mathematical models
Positive displacement pumps
Pressure
Pumps
Suction
Three dimensional models
Tip clearance
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Summary:External gear pumps are typically used as positive displacement machines that are capable of developing high pressures while operating at low suction pressures in hydraulic systems. Considerable attention has paid recently been given to investigating the flow characteristics and enhancing pump efficiency using theoretical, numerical, and experimental approaches. In this study, three-dimensional (3D) numerical simulations of an external gear pump were conducted to study the effects of 3D geometrical design parameters on pump performance characteristics such as the flow rate. The characteristics of internal flow are also presented with respect to the internal pressure peak, local cavitation, and delivery pressure ripple. The immersed solid method (ISM) was used to simulate the operation of a gear pump under extreme conditions of high rotational speed. We found that the maximum flow rate of the gear pump is a strong function of the gear tip clearance and lateral clearance. Using the 3D model, the effect of the lateral clearance on flow rate is highlighted.
ISSN:1359-4311
1873-5606
DOI:10.1016/j.applthermaleng.2017.03.014