| 交替大小肋片方腔通道内换热性能的数值模拟 |
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| 引用本文： | 苏生,胡捷,刘建军,安柏涛.交替大小肋片方腔通道内换热性能的数值模拟[J].航空动力学报,2008,23(12):2274-2279. |
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| 作者姓名： | 苏生 胡捷 刘建军 安柏涛 |
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| 作者单位： | 中国科学院工程热物理研究所;中国科学院研究生院; |
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| 摘 要： | 采用商业软件CFX研究了内部具有不同间距的周期性交替大小肋片的方腔通道的换热性能.结果发现:流体流过斜置肋片时,从肋片的上游端点开始形成一个紧靠带肋壁面向斜下游发展的喇叭状涡,此涡使肋片之间形成卵形高换热区域;高换热区域面积的大小与流体流动情况有关,而且受下游肋片影响.与采用单一尺寸肋片的通道相比,在适当的位置加入小肋片能够改善再附着区域下游的换热,同时降低通道的流阻系数,增强综合换热能力.
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| 关 键 词： | 方腔通道 大小肋片 换热特性 |
| 收稿时间： | 2007/11/28 0:00:00 |
| 修稿时间： | 2008/5/14 0:00:00 |
Numerical simulation on heat transfer in duct roughened by periodic alternate scale ribs |
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| SU Sheng,HU Jie,LIU Jian-jun and AN Bai-tao.Numerical simulation on heat transfer in duct roughened by periodic alternate scale ribs[J].Journal of Aerospace Power,2008,23(12):2274-2279. |
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| Authors: | SU Sheng HU Jie LIU Jian-jun and AN Bai-tao |
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| Affiliation: | Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;Graduate University of Chinese Academy of Sciences, Beijing 100190, China;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;Graduate University of Chinese Academy of Sciences, Beijing 100190, China;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | To study the heat transfer characteristics in a rectangular duct rib-roughened by periodic alternate scale ribs,six models with different rib scale were studied by employing commercial computational fluid dynamics(CFD)software CFX.The results show that,as fluid passes through each rib,a trumpet-shaped vortex is generated from the upstream vertex of the rib,shaping a region with high value of heat transfer coefficient(HTC).The area of high HTC region is affected by both the fluid flow condition and the locat... |
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| Keywords: | rectangular duct periodic alternate scale ribs heat transfer |
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