平板间充填颗粒和壁面开槽时的流动与传热强化特性的实验研究

Experimental Investigation of the Flow and Heat Transfer Intensification Characteristics for Parallel Plates with Beads Packed Between Them and Slotted Plate Wall Surface

提出了在平行平板间填充颗粒的同时 ,运用板面加开微型纵槽构成复合多孔介质 ,以改善流体流动与传热综合性能的方案 ,并报道了实验结果及其分析。研究的结果表明 ,对于这种复合多孔结构 ,在适宜的颗粒直径dp、槽宽w、槽深d及板间距δ匹配下 ,传热比未开槽时有明显提高 ,而流动阻力却有所下降 ,因而证明是综合提高多孔介质强化传热技术经济性的有效措施。

With beads packed between parallel flat plates and mini longitudinal slots opened on plate surface, composite porous media were formed to improve fluid flow and heat transfer comprehensive performance. The results of the investigation were reported and analyzed. They indicate that under this kind of composite porous construction the proper matching of bead particle diameter, slot width, slot depth and clearance between plates can lead to a significant enhancement of heat transfer performance as compared with the case of flat plates with no slots provided. Meanwhile, flow resistance has been somehow lowered. The positive results thus obtained prove that the proposed measures are highly cost effective in achieving an intensified heat transfer in porous media.