• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Heat transfer >Numerical study and sensitivity analysis on convective heat transfer enhancement in a heat pipe partially filled with porous material using LTE and LTNE methods
【24h】

Numerical study and sensitivity analysis on convective heat transfer enhancement in a heat pipe partially filled with porous material using LTE and LTNE methods

机译：利用LTE和LTNE方法对部分填充多孔材料的热管中对流换热增强的数值研究和敏感性分析

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

An improved design for convective heat transfer in a heat pipe partially filled with porous medium is presented. In the present study, porous media is used to increase heat transfer in laminar flow inside the tube with a constant heat flux boundary condition. The porous segments are set in different positions in the tube, while the ratio of porous volume to total volume of tube is considered to be constant. A performance evaluation criteria (PEC), which takes account of both heat transfer and pumping power, is defined to find the enhanced mode of porous media arrangement. According to the current results, PEC increases with the number of porous segments. Moreover, the sequence of unequal segments arrangement within the tube is from the largest to the smallest part for a higher PEC. Effects of parameters including porosity, Darcy number, and ratio of effective coefficient of thermal conductivity to coefficient of thermal conductivity of fluid (TKR) are investigated for sensitivity analysis. Simulations are conducted using the local thermal equilibrium method. In addition, the local thermal nonequilibrium is also used for comparison. For TKR numbers less than 10, these models show the same results with negligible differences except for TKR more than 10.
机译：提出了一种在部分填充有多孔介质的热管中对流传热的改进设计。在本研究中，在恒定的热通量边界条件下，使用多孔介质来增加管内层流的热传递。多孔段设置在管中的不同位置，而多孔体积与管总体积之比被认为是恒定的。定义了兼顾传热和泵送功率的性能评估标准（PEC），以发现多孔介质布置的增强模式。根据目前的结果，PEC随着多孔链段数量的增加而增加。而且，对于较高的PEC，管内不等段排列的顺序是从最大到最小。为了进行敏感性分析，研究了包括孔隙率，达西数以及有效导热系数与流体导热系数（TKR）之比在内的参数的影响。使用局部热平衡方法进行模拟。另外，局部热不平衡也用于比较。对于小于10的TKR，这些模型显示相同的结果，但TKR大于10时差异很小。

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