南京航空航天大学学报（英文版）2021，Vol.38Issue(3)：427-436,10.
格子Boltzman方法的微间隙旋转流动研究
Rotational Flow in a Narrow Annular Gap Based on Lattice Boltzmann Method
摘要
Abstract
For comprehensive characteristics of flow in a gas bearing,lattice Boltzmann method(LBM)is applied for study of the two-dimensional flow between two eccentric cylinders with the inner one rotating at a high speed. The flow pattern and circumferential pressure distribution are discussed based on critical issues such as eccentricity ranging from 0.2 to 0.9,clearance ratio varying from 0.005 to 0.01 and rotating speed in the range of 3×104—1.8×105 r/min. The analysis and discussion on the circumferential pressure distribution affirmed the quasilinear relation between the extremum pressure and rotating speed. Furthermore,a high eccentricity and small clearance ratio contributes most to the fluctuation of the circumferential pressure distribution. The flow pattern inside the channel exhibits separation vortex under a large eccentricity. The conclusions drawn in this work give rise to prediction of the flow pattern in the gas bearing which is beneficial for evaluating the performance of as well as instructing the design and development.关键词
微小间隙/偏心旋转的圆柱/气体轴承/格子玻尔兹曼方法Key words
narrow annular/eccentric rotating cylinders/gas bearing/lattice Boltzmann method(LBM)分类
能源科技引用本文复制引用
王一淼,张镜洋,朱桂平..格子Boltzman方法的微间隙旋转流动研究[J].南京航空航天大学学报（英文版）,2021,38(3):427-436,10.基金项目
This work was partially supported by the Aeronautical Science Foundation of China(No.201928052008). （No.201928052008）
