| 平直翅片管翅式换热器减阻强化传热数值模拟 |
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| 引用本文： | 徐百平,江楠,刘腾霄,杨卫国.平直翅片管翅式换热器减阻强化传热数值模拟[J].石油炼制与化工,2006,37(9):45-49. |
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| 作者姓名： | 徐百平 江楠 刘腾霄 杨卫国 |
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| 作者单位： | 1. 广东轻工职业技术学院轻化工程系,广州,510300
2. 华南理工大学工业装备与控制工程学院 |
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| 摘 要： | 摘要借助Fluent软件，采用边界加密的六面体网格，建立了平直翅片管翅式换热器三维物理模型。在层流假设的基础上，利用具有二阶精度的QUICK差分格式，对换热器内的流动与传热进行了数值模拟研究。根据得到的换热器通道内的传热与阻力特性，提出了可以通过控制宏观流场来减阻强化传热的思想，给出了一种在工程上容易实现的方法，并进行了相应的数值计算。结果表明，新方案使传热Nu数平均提高了7．24％，而阻力系数下降，且最大下降达6．39％。
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| 关 键 词： | 翅片管 换热器 流动阻力 传热 数值模拟 |
| 收稿时间： | 2005-12-19 |
| 修稿时间： | 2006-04-10 |
NUMERICAL SIMULATION OF HEAT TRANSFER ENHANCEMENT BY REDUCING FLOW RESISTANCE IN HEAT EXCHANGER HAVING FLAT FIN TUBE |
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| Xu Baiping,Jiang Nan,Liu Tengxiao,Yang Weiguo.NUMERICAL SIMULATION OF HEAT TRANSFER ENHANCEMENT BY REDUCING FLOW RESISTANCE IN HEAT EXCHANGER HAVING FLAT FIN TUBE[J].Petroleum Processing and Petrochemicals,2006,37(9):45-49. |
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| Authors: | Xu Baiping Jiang Nan Liu Tengxiao Yang Weiguo |
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| Affiliation: | 1. Light Chemical Engineering Department of Guangdong Industry Technology College ,Guangzhou 510300; 2. College of Industrial Equipment and Control Engineering,South China University of Technology |
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| Abstract: | A tube-and-fin heat exchanger with flat fins was modeled with Fluent in 3-D. The whole flow space was meshed by hexahedron grids with a higher mesh density near the boundary zones. Based on the laminar flow assumption, the flow and heat transfer in the exchanger passage was numerically simulated with a second order precision QUICK scheme. With this simulation, the characteristics of heat transfer and resistance performance in the exchanger passage was analyzed, and an idea of enhancing heat transfer by controlling the macro-scopical flow field to reduce flow resistance was proposed. In addition, a feasible method for engineering practice was given and the corresponding computation was carried out. The results showed that the new measurement increased the heat transfer efficiency by 7. 240% on the average with flow resistance dropped by 6. 39%. |
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| Keywords: | finned tube heat exchanger flow resistance heat transfer numerical simulation |
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