...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Mathematics and Statistics >Numerical Investigation on Performance Improvement in Tube Inserted with Delta Winglets on Discrete Right-Angled Triangular Plates
【24h】

Numerical Investigation on Performance Improvement in Tube Inserted with Delta Winglets on Discrete Right-Angled Triangular Plates

机译：离散直角三角形板上插入三角翼小翼的管性能改进的数值研究

获取原文
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Numerical investigations on flow topology and heat transfer behavior in a round tube heat exchanger inserted with Delta Winglets (DW) on Discrete Right-angled Triangular Plates (DRTP) are performed. The influences of DW heights; b/D or BR = 0.05-0.25 and flow directions; DW with V-Downstream (DWVD) and DW with V-Upstream (DWVU), are studied for turbulent flow; Re = 3000-10,000. The finite volume method with SIMPLE algorithm is selected to solve the present problem. The numerical results are presented in terms of flow and heat transfer mechanisms; tangential velocity vector, TKE contour, Nux contour, temperature contour. The heat transfer rate, pressure loss and thermal performance in the test tube are also analyzed in forms of Nusselt number (Nu), friction factor (f) and Thermal Enhancement Factor (TEF), respectively. The results show that the tube inserted with the DW on DRTP can help to improve the heat transfer rate and thermal performance in the heating section due to the DW can generate the vortex flow that disturbs the thermal boundary layer on the tube wall. In range investigates, the maximum heat transfer rate is around 4.5 times above the smooth tube with the TEF around 1.9.
机译：对在离散直角三角板（DRTP）上插入三角翼小翼（DW）的圆管热交换器中的流动拓扑和传热行为进行了数值研究。 DW高度的影响; b / D或BR = 0.05-0.25和流向;研究了带有V下游的DW（DWVD）和带有V上游的DW（DWVU）的湍流。 Re = 3000-10,000。选择采用SIMPLE算法的有限体积方法来解决该问题。数值结果以流动和传热机理表示。切线速度矢量，TKE轮廓，Nux轮廓，温度轮廓。还分别以努塞尔数（Nu），摩擦系数（f）和热增强系数（TEF）的形式分析了试管中的传热速率，压力损失和热性能。结果表明，在DTP上插入DW的管可以帮助提高加热部分的传热速率和热性能，因为DW会产生涡流，扰动管壁上的热边界层。在范围研究中，最大传热速率是光滑管的4.5倍左右，TEF约为1.9。

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