文献类型：期刊文献

中文题名：梯形螺旋外肋管管外强化传热性能研究

英文题名：Enhanced heat transfer performance outside of trapezoidal spiral external finned tube

作者：曹佳铭[1];王学生[1];陈琴珠[1]

机构：[1]华东理工大学承压系统与安全教育部重点实验室机械与动力工程学院,上海200237

年份：2021

卷号：49

期号：8

起止页码：22

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

语种：中文

中文关键词：强化传热;数值模拟;螺旋外肋管;流阻特性

外文关键词：heat transfer enhancement;numerical simulation;spiral external finned tube;flow resistance characteristics

摘要：为研究梯形螺旋外肋管(TSEFT)强化传热效果,建立了其管外周期单元流道模型。在雷诺数10000≤R e≤24000范围内,通过数值模拟研究不同参数对其流动传热以及阻力性能的影响。研究表明:梯形螺旋外肋改变了流体的流动状态,从而扰动边界层使其不断脱落,达到强化传热的效果。随着肋高e与底宽b的增大,顶角α与螺距p的减小,梯形螺旋外肋管的传热系数与压降均相应增加。在低雷诺数区域,梯形螺旋外肋管综合性能普遍优于圆形外肋管,综合换热因子最大可以达到1.42。利用多元线性回归拟合了梯形螺旋外肋管管外流动传热与阻力计算关联式,为该类换热管的工程应用提供了设计依据。
The periodic unit flow channel model of trapezoidal spiral external finned tube(TSEFT)was established to study the heat transfer enhancement.Effects of different parameters of TSEFT on heat transfer and resistance performance of the tube were studied by numerical simulation in the range of 10000≤R e≤24000.The results show that TSEFT changes the flow state of the fluid,which disturbing the boundary layer and causing it to fall off continuously,finally strengthening the heat transfer.The heat transfer coefficient and pressure drop increase with the increase of fin height and bottom width,while they increase with the decrease of top angle and pitch.In the low Reynolds number region,the comprehensive performance of TSEFT is generally better than circular spiral external finned tubes and the highest comprehensive heat transfer factor can be 1.42.The correlations for calculating the heat transfer and flow resistance of TSEFT were fitted by using multivariate linear regression.They provide guidance and basis for the design and engineering application of this kind of tubes.