A numerical study of cavitation foot‐prints in liquid‐lubricated asymmetrical herringbone grooved journal bearings
A numerical study of cavitation foot‐prints in liquid‐lubricated asymmetrical herringbone grooved journal bearings
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DOI：
10.1108/09615530210434278
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发表时间：
2002-08
影响因子：
4.2
通讯作者：
Wang Junmei;Thong-See Lee;C. Shu;Wu Jiankang
中科院分区：
文献类型：
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作者：
Wang Junmei;Thong-See Lee;C. Shu;Wu Jiankang
本文提出了一种数值模型，以更好地描述液体润滑非对称人字形槽径向轴承（HGJB）中的气穴流体流动现象。本文采用一种有效的“跟随沟槽”网格变换方法来捕捉所有的沟槽边界。通过这种方法可以避免凹槽边缘的奇异性。该方法可以准确地计算对称和非对称的沟槽图案。在液体润滑的HGJB物理域中，油膜厚度突变的难题在这里通过级数展开方法建模。结果与其他研究者的实验和已知数值数据相比较。在这项研究中，空化足迹，压力分布和相应的负载特性。临界过渡流现象对非对称HGJB性能的影响也通过本研究确定。
A numerical model is presented in this paper to better describe the cavitated fluid flow phenomena in liquid‐lubricated Asymmetrical Herringbone Grooved Journal Bearings (HGJBs). An effective “follow the groove” grid transformation method is used in the present study to capture all the groove boundaries. A singularity at the groove edges is avoided with this approach. Symmetrical groove patterns as well as asymmetrical groove patterns can be accurately computed with the proposed method. The difficult problem of abrupt changes of oil film thickness in the liquid‐lubricated HGJB physical domain is modeled here through a series expansion approach. Results are comparable with available experimental and known numerical data from other investigators. Cavitation footprints, pressure distributions and their corresponding load characteristics are presented in this study. Effects of the critical transitional flow phenomena on the performance of the asymmetrical HGJBs are also determined through the present study.