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| 空气横掠矩形翅片椭圆管束换热规律的数值研究 |
| Numerical study on heat transfer of air across rectangular fins in the elliptic-tube heat exchanger |
| 投稿时间：2006-02-08 |
| DOI： |
| 中文关键词: 矩形翅片 换热 数值模拟 翅片间距 |
| 英文关键词:rectangular fins heat transfer numerical simulation fin spacing |
| 基金项目: |
| 丁永航 李永光 汪军 张丽华 |
| [1]上海理工大学动力工程学院,上海200093 [2]上海电力学院动力工程系,上海200093 |
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| 中文摘要: |
| 采用Fluent软件对矩形翅片椭圆管束空气侧的对流换热情况进行了三维数值模拟，获得了不同流速下翅片表面温度分布，分析了迎面风速与换热系数之间的关系，随着速度的增大，空气侧的换热系数增加，并拟合了换热计算公式。同时分析了不同翅片间距对换热的影响因素，随着翅片间距的增大，空气侧换热系数增加，而且随着Rg数的增加，换热的强化更加明显。 |
| 英文摘要: |
| The air-side heat transfer of rectangular investigated numerically by the software of FLUENT. and heat transfer coefficient table at different upstream fins in an elliptic-tube heat exchanger is The fins surface temperature contour charts velocities are obtained. The influence of the air velocity on the surface temperature and heat transfer are analyzed. The results indicated that the heat transfer coefficient increases with increasing cooling air velocity. With increasing fin spacing, the heat transfer coefficient increases, and the enhancement of heat transfer was significant when Re increases as well. |
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