化学工程2012，Vol.40Issue(12)：28-31,47,5.DOI:10.3969/j.issn.1005-9954.2012.12.007
旋流片支撑缩放管管束传热与流动的数值模拟
Numerical simulation on heat transfer and flow characteristics of converging-diverging tube bundles supported with regularly spaced twisted tapes
摘要
Abstract
The periodic heat transfer and flow characteristics of water in converging-diverging tube (CD) bundles supported with regularly spaced twisted tapes (RSTT) were studied and compared with the thermal performances of plain tube bundles, bare CD bundles and plain tube bundles supported with RSTT by numerical simulation. In addition, the effect of different geometric parameters of RSTT and field synergy between velocity and heat flow field were also discussed. The results indicate that the CD bundles with longer converging pitch have a better overall thermal performance than the ones with longer diverging pitch,and the overall thermal performances of CD bundles supported with RSTT are higher than that of plain tube bundles supported with RSTT but lower than that of bare CD bundles. It shows that RSTT with bigger twist ratio and smaller rotation angle is in favor of improving the overall thermal performance. The results obtained also show that the CD bundles supported with RSTT have a better field synergy than the bare CD bundles and plain tube bundles supported with RSTT, resulting in having a better heat transfer enhancement compared with the bare CD bundles and plain tube bundles supported with RSTT. Considering the stable and ant-vibration necessity between tube bundles,the insertion of RSTT into CD bundles is a kind of high efficient heat transfer enhancement method. Under the optimum conditions , the max heat transfer overall performance can reach 1.057.关键词
强化传热/缩放管/旋流片/场协同分析Key words
heat transfer enhancement/ converging-diverging tubes/ regularly spaced twisted tapes/ field synergy分类
能源科技引用本文复制引用
洪宇翔,邓先和,张连山,焦凤,杨志平..旋流片支撑缩放管管束传热与流动的数值模拟[J].化学工程,2012,40(12):28-31,47,5.基金项目
广东省重大科技专项(2011A080804012) （2011A080804012）
国家自然科学基金资助项目(20776046) （20776046）
