Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13948
Title: Numerical study of liquid-lubricated two-layer and multiple-layer herringbone grooved journal bearings
Authors: LIU YAOGU
Keywords: Herringbone groove, pumping effect, stability, cavitation, length-to-diameter ratio, groove-length ratio
Issue Date: 3-Jun-2004
Source: LIU YAOGU (2004-06-03). Numerical study of liquid-lubricated two-layer and multiple-layer herringbone grooved journal bearings. ScholarBank@NUS Repository.
Abstract: A numerical model using the modified Elroda??s cavitation algorithm is used to investigate the performance of the liquid-lubricated herringbone grooved journal bearings (HGJBs). The corresponding governing equations are discretized using the finite difference method and solved by the alternating direction implicit method. Firstly, the model is used to study the herringbone groovesa?? pumping effect and its influence on journal bearinga??s stability of both the symmetrical and asymmetrical two-layer HGJBs. Then the effect of the groove-length ratio and the groove-depth ratio on the HGJBsa?? performance is investigated. In addition, the effect of the length-to-diameter ratio (L/D) and the eccentricity on the HGJBsa?? performance are examined for multiple-layer HGJBs with various groove patterns. It is found that the herringbone groovesa?? pumping effect makes the HGJBs free from the half-frequency whirl and therefore, better stability than plain journal bearings. For multiple-layer HGJBs, one found that the maximum pressure and the cavitation ratio increase with L/D and the load capacity.
URI: http://scholarbank.nus.edu.sg/handle/10635/13948
Appears in Collections:Master's Theses (Open)

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