期刊
APPLIED THERMAL ENGINEERING
卷 118, 期 -, 页码 539-550出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2017.03.014
关键词
External gear pump; Computational fluid dynamics (CFD); Immersed solid method (ISM); Cavitation; Flow rate
资金
- Critical Military Parts Localization Program - Defense Agency for Technology and Quality (DTaQ Korea) [C120006]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2015R1A2A2A01003741, NRF-2016M2B2A9A02945310]
- National Research Foundation of Korea [2016M2B2A9A02945310] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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. (C) 2017 Elsevier Ltd. All rights reserved.
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