• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer and fluid flow analysis in plate-fin and tube heat exchangers with a pair of block shape vortex generators
【24h】

Heat transfer and fluid flow analysis in plate-fin and tube heat exchangers with a pair of block shape vortex generators

机译：带有一对块状涡流发生器的板翅管换热器中的传热和流体流动分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Numerical and experimental analyses were carried out to study the heat transfer and flow in the plate-fin and tube heat exchangers with inclined block shape vortex generators mounted behind the tubes. The effects of different span angles a (a = 30°, 45° and 60°) are investigated in detail for the Reynolds number ranging from 400 to 3000. Numerical simulation was performed by a 3D turbulence analysis of the heat transfer and fluid flow. Experiments were carried out by an infrared thermovision and a water tunnel system, respectively, to visualize the temperature distribution and local flow structure. The results indicated that the proposed heat transfer enhancement technique is able to generate longitudinal vortices and to improve the heat transfer performance in the wake regions. The case of a = 45° provides the best heat transfer augmentation. A reduction in fin area of 25% may be obtained if vortex generators embedded fins are used in place of plain fins at Re{sub}(Dh) = 500.
机译：进行了数值和实验分析，以研究在管后方安装有倾斜块状涡流发生器的板翅式和管式热交换器中的传热和流动。对于400到3000范围内的雷诺数，详细研究了不同跨距角a（a = 30°，45°和60°）的影响。通过热传递和流体流动的3D湍流分析进行了数值模拟。分别通过红外热像仪和水隧道系统进行了实验，以可视化温度分布和局部流动结构。结果表明，所提出的传热增强技术能够产生纵向涡流并改善尾流区域的传热性能。 a = 45°的情况提供了最佳的传热效果。如果在Re {sub}（Dh）= 500处使用涡流发生器嵌入的鳍片代替普通鳍片，则鳍片面积可减少25％。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号