南京航空航天大学学报（英文版）2023，Vol.40Issue(5)：522-533,12.DOI:10.16356/j.1005-1120.2023.05.002
带轴向通流旋转管内部肋结构的流动传热特性数值研究
Numerical Study on Flow and Heat Transfer Characteristics Inside Rotating Rib-Roughened Pipe with Axial Throughflow
王宇婕 1孙文静 1高齐宏 1张靖周1
作者信息
- 1. 南京航空航天大学能源与动力学院,南京 210016,中国
- 折叠
摘要
Abstract
A numerical study was performed on the flow and heat transfer characteristics inside a rotating rib-roughened pipe with an axial throughflow,under a fixed axial throughflow Reynolds number Rex 6400 and a series of rotational Reynolds number Reω ranging from 0 to 3.77×104.Three rib configurations were taken into consideration,including ring rib,discrete-ring rib and longitudinal rib,wherein the ring-type ribs were distributed along the axial direction and the longitudinal-type ribs were distributed along the circumferential direction.The results show that the flow field inside a rotating pipe is affected by both axial through flow and rotation-induced azimuthal flow.Under small rotational Reynolds numbers,the axial through flow is dominant such that the ring-type rib plays significant heat transfer enhancement role.Whereas under high rotational Reynolds numbers,the rotation-induced azimuthal flow is dominant such that the longitudinal-type rib is superior to the ring-type rib on heat transfer enhancement.In the view of a comprehensive performance factor that considers both heat transfer enhancement and flow loss together,the discrete-ring rib is identified to be the best among the current three rib configurations under small rotational Reynolds numbers.However,under high rotational Reynolds numbers,the ring-type ribs show no advantage over smooth pipe,and even lead to a reduction in comprehensive performance when compared to the smooth pipe.For the high-speed rotating pipe,the longitudinal-type rib is a promising rib configuration as applied to the heat transfer enhancement.关键词
旋转管/肋结构/轴向通流/流动传热/综合性能因子Key words
rotating pipe/rib configuration/axial throughflow/flow and heat transfer/comprehensive performance factor分类
航空航天引用本文复制引用
王宇婕,孙文静,高齐宏,张靖周..带轴向通流旋转管内部肋结构的流动传热特性数值研究[J].南京航空航天大学学报（英文版）,2023,40(5):522-533,12.
