文献类型：期刊文献

中文题名：螺旋扭曲椭圆管内纵向涡流动特性与强化传热机理的CFD分析

英文题名：CFD analysis on longitudinal vortex flow characteristics and heat transfer enhancement mechanism of a spiral twisted elliptical tube

作者：杨胜[1];张莉[2];胡腾[1]

机构：[1]国家核电技术有限公司北京研发中心,北京100190;[2]华东理工大学机械与动力工程学院,上海200237

年份：2014

卷号：42

期号：10

起止页码：73

中文期刊名：低温与超导

外文期刊名：Cryogenics and Superconductivity

收录：北大核心:【北大核心2011】；

基金：国家科技重大专项"大型先进压水堆及高温气冷堆核电站"项目(2011ZX06002-004)资助

语种：中文

中文关键词：螺旋扭曲椭圆管;纵向涡;场协同;强化传热;CFD

外文关键词：Spiral twisted elliptical tube, Longitudinal vortex, Field synergy, Heat transfer enhancement, CFD

摘要：以水为介质,采用CFD软件ANSYS Fluent对螺旋扭曲椭圆管内流体的流动规律与强化传热机理进行了研究。研究发现,螺旋扭曲椭圆管特殊的螺旋形管壁形状可诱发管内流体旋转形成纵向涡,且纵向涡的强度不随流动距离的增大而衰减,持续性能良好;纵向涡的存在使得螺旋扭曲椭圆管内流体得速度分布产生明显变化,增强了管内流体速度场与温度场间的协同性能,进而强化流体传热。
The fluid flow characteristics and heat transfer enhancement mechanism of a spiral twisted elliptical tube were re-searched by adopting CFD software ANSYS Fluent using water as medium. The result shows that the longitudinal vortex is in- duced in the twisted elliptical tube by the special tube wall, and the longitudinal vortex has a well sustainability and its strength does not decrease along the flow distance; the fluid velocity distribution in the tube changes due to the longitudinal vortex, which will enhance the synergy between the velocity field and temperature field thus to strengthen the heat transfer of fluid in tube.