Stability of Flow between Finite Eccentric Cylinders in Rotation

旋转中有限偏心圆柱间的流动稳定性

• 批准号: 8920956
• 负责人: Andras Szeri
• 金额: $ 13.71万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8920956&HistoricalAwards=false
• 关键词: Stability; Flow; between; Finite; Eccentric

This research will utilize numerical simulation to address the influence of end-walls on the flow in the space between eccentric rotating cylinders. The common belief that such effects disappear when the end-walls are sufficiently far apart is called into question by results developed through earlier results by these researchers, who focus on the development of instabilities in this flow. The present study will generalize and systematize the role of end-walls in structuring the possible instability modes which may occur. The configuration to be studied is representative of flows in certain types of bearings and other tribological systems, where instabilities may cause unanticipated dynamics and loss of efficiency.

本研究将利用数值模拟来研究端壁对偏心旋转圆柱间空间流动的影响。通常认为，当端壁距离足够远时，这种影响就会消失，这一点受到了这些研究人员通过早期结果得出的结果的质疑，他们专注于这种流动中不稳定的发展。本研究将概括和系统化端壁在构造可能发生的失稳模式中的作用。要研究的构型代表了某些类型的轴承和其他摩擦学系统中的流动，在这些系统中，不稳定可能会导致意想不到的动态和效率损失。