西南交通大学学报2025，Vol.60Issue(2)：425-433,9.DOI:10.3969/j.issn.0258-2724.20230308
Taylor-Couette波状涡流场环隙波动的变化特征
Fluctuation Characteristics of Wavy Vortex Field Within Annular Gap in Taylor-Couette
摘要
Abstract
The large eddy simulation(LES)method was applied to transiently simulate the wavy vortex field within the annular gap in Taylor-Couette and investigate the variation of fluctuations between wavy vortices.The wavy vortex field within the annulus gap was investigated from both two-dimensional and three-dimensional perspectives.The results indicate that the velocity vector field on the meridian plane of the two-dimensional wavy vortex field within the annular gap exhibits periodic fluctuation characteristics.The velocity vector field remains essentially the same at the beginning and end moments of the cycle.The axial velocity direction at the vortex junction changes constantly and periodically,while the radial and tangential velocity directions remain constant.The velocity values of the vortex pairs are greater than those of the vortex pairs inside the vortex,and the mainstream liquid transfer mainly occurs between the vortex pairs in the outward flow.Additionally,the fluctuation phenomenon of the three-dimensional wavy vortex field is clearly evident and exhibits periodic characteristics.The cycles for each working condition(10,20,30,and 40 r/min)are 12.94 seconds,6.80 seconds,1.93 seconds,and 1.49 seconds,respectively.With the increase in rotational Reynolds number,there is a significant decrease in vortex fluctuation amplitude and a reduction in the duration of fluctuations.The periodic flow transport of the mainstream liquid between vortices within the annulus gap propels fluid microclusters to perform a spiral-coupled vortex rotation around the inner cylinder within the annulus gap.关键词
Taylor-Couette/波状涡/速度矢量场/环隙/波动特征Key words
Taylor-Couette/wavy vortex/velocity vector field/annular gap/fluctuation characteristic分类
水利科学引用本文复制引用
毛玉红,陈超,李亚蓉,付海煜..Taylor-Couette波状涡流场环隙波动的变化特征[J].西南交通大学学报,2025,60(2):425-433,9.基金项目
国家自然科学基金项目(51968038,51468029) （51968038,51468029）
甘肃省重点研发计划(23YFGA0048) （23YFGA0048）
甘肃省教育厅高校科研创新平台重大培育项目(2024CXPT-14) （2024CXPT-14）
