Experimental Investigation to Natural Convective Heat Transfer in Wire-Woven Bulk Kagome Truss

doi:10.7652/xjtuxb201407003

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Experimental Investigation to Natural Convective Heat Transfer in Wire-Woven Bulk Kagome Truss

更新时间：2025-07-09

- Experimental Investigation to Natural Convective Heat Transfer in Wire-Woven Bulk Kagome Truss
- Vol. 48, Issue 7, Pages: 12-16(2014)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201407003
  CLC： TK121
- Online First：10 July 2014，
  
  Published：2014
- 稿件说明：
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Experimental Investigation to Natural Convective Heat Transfer in Wire-Woven Bulk Kagome Truss[J]. 2014, 48(7): 12-16.
DOI：

Experimental Investigation to Natural Convective Heat Transfer in Wire-Woven Bulk Kagome Truss[J]. 2014, 48(7): 12-16. DOI： 10.7652/xjtuxb201407003.

摘要

为了研究金属丝网编织Kagome(WBK)热沉自然对流换热性能及其影响因素

对WBK热沉进行了大空间稳态自然对流实验研究。鉴于WBK热沉结构上强烈的各向异性

在不同面烧结铝基板进行总传热热阻测量。设计搭建了具有0°～90°任意旋转功能的实验台

对不同倾角下的自然对流换热热阻进行了测量。作为参照

选取与WBK热沉相同尺寸的光板进行了稳态自然对流热阻测量。研究结果表明:与光表面相比

WBK芯体具有更高的比表面积

可以有效地降低自然对流换热热阻

为光表面的42%左右。WBK芯体3个方向的对流换热热阻不同

显示出强烈的各向异性

具有适中堵塞率(迎风面积)的o-b方向具有最小的热阻。在0°～90°倾角内

WBK芯体在3个方向均存在一个最佳倾角

约为50°

相应的换热热阻最小。

Abstract

Natural convection on a novel periodic lattice frame material wire-woven bulk Kagome-sintered plate(WBK)at different inclination angles is experimentally investigated

and overall heat transfer performance is evaluated by the total thermal resistance concerning the effects of orientations(o-a

o-b

and o-c)and inclination angles covering 0°(horizontal orientation)

15°

30°

45°

60°

75°

and 90°(vertical orientation). The optimal inclination angle is found to approach 50°

corresponding to the minimum thermal resistance at a heat flux of 1 150 W/m

. The average thermal resistance for WBK specimens gets 42% that of the smooth plate in the Rayleigh number range of 6.1×10

-2.2×10

. The heat transfer performance(thermal resistance)of

WBK sample is different in three orientations due to its strong anisotropic topology: o-b orientation has smallest thermal resistance

but o-a orientation has the biggest one. Moderate blockage ratio results in relatively high flow mixing but acceptable flow resistance

ultimately leading to enhancing natural convective heat transfer.

关键词

Keywords

references

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