期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
相变材料微胶囊悬浮液在矩形小通道内层流流动传热的实验 被引量:18
1
作者 饶宇 Frank Dammel +1 位作者 peter stephan 林贵平 《航空动力学报》 EI CAS CSCD 北大核心 2006年第6期1012-1020,共9页
本文进行了对比性的实验,以研究相变材料微胶囊(MEPCM)-水悬浮液在水力直径为2.71mm的矩形小通道内的层流流动传热性能。实验中用的MEPCM颗粒的平均粒径为4.97μm,与蒸馏水混合制备成质量浓度范围为0~20%的MEPCM-水悬浮液。对... 本文进行了对比性的实验,以研究相变材料微胶囊(MEPCM)-水悬浮液在水力直径为2.71mm的矩形小通道内的层流流动传热性能。实验中用的MEPCM颗粒的平均粒径为4.97μm,与蒸馏水混合制备成质量浓度范围为0~20%的MEPCM-水悬浮液。对比性的实验是指,在相同的悬浮液质量流量和热力条件下,使用不同浓度的MEPCM悬浮液进行传热实验。实验发现,MEPCM悬浮液的冷却性能严重依赖于悬浮液的质量流量和悬浮液的质量浓度。质量浓度为5%的悬浮液在在整个质量流量范围内总是表现出比水好的冷却性能,它对应的是更低的壁面温度以及更好的传热系数。而对于更高质量浓度的悬浮液,在低质量流量的情况下,它们具有很好的冷却性能;而在高质量流量的情况下,它们表现出的冷却性能比水更差,它们对应更高的壁面温度以及更低的Nusselt数。 展开更多
关键词 航空 航天推进系统 微胶囊 相变材料 悬浮液 小通道 对流传热系数
下载PDF
Flow frictional characteristics of microencapsulated phase change material suspensions flowing through rectangular minichannels 被引量:7
2
作者 Frank Dammel peter stephan 《Science China(Technological Sciences)》 SCIE EI CAS 2006年第4期445-456,共12页
An experimental investigation was conducted on the laminar flow frictional characteristics of suspensions with microencapsulated phase change material (MEPCM) in water flowing through rectangular copper minichannels. ... An experimental investigation was conducted on the laminar flow frictional characteristics of suspensions with microencapsulated phase change material (MEPCM) in water flowing through rectangular copper minichannels. The MEPCM was provided at an average particle size of 4.97 μm, and was mixed with distilled water to form suspen- sions with various mass concentrations ranging from 0 to 20%. The experiment was per- formed to explore the effect of MEPCM mass concentration on friction factor and pressure drop in the minichannels. The Reynolds number ranged from 200 to 2000 to provide laminar and transitional flows. It was found that the experimental data for the suspensions with 0 and 5% concentration agree well with the existing theoretical data for an incom- pressible, fully developed, laminar Newtonian flow. For the suspensions with mass con- centrations higher than 10%, there is an obvious increase in friction factor and pressure drop in comparison with laminar Newtonian flow. 展开更多
关键词 microencapsulated phase change material suspension FRICTION factor RECTANGULAR minichannel.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部