| 水平微细圆柱表面与水自然对流换热的实验研究 |
| |
| 引用本文： | 董庆,孙立,贺建昆.水平微细圆柱表面与水自然对流换热的实验研究[J].山东理工大学学报,2007,21(5):85-87. |
| |
| 作者姓名： | 董庆 孙立 贺建昆 |
| |
| 作者单位： | 山东理工大学,轻工与农业工程学院,山东,淄博,255049;山东省科学院能源研究所,山东,济南,250014 |
| |
| 摘 要： | 采用焦耳加热法对不同尺寸的水平微细铜丝在水中加热,并将实验得到的努谢尔特数Nu与常规尺寸下经典准则关系式的计算值比较.实验结果表明,在相同壁面过热度下,实验Nu数要小于经典准则关系式的计算值,并且实验Nu数几乎保持不变.这说明微细铜丝与水的换热由对流为主转变为对流与导热共同作用为主或是纯导热,从而导致了实验值小于常规尺寸下的理论计算值.
|
| 关 键 词： | 焦耳加热 微细铜丝 自然对流换热 努谢尔特数 |
| 文章编号： | 1672-6197（2007）05-0085-03 |
| 修稿时间： | 2007-02-07 |
Experimental study on heat transfer of natural convection between horizontal micro-wire and water |
| |
| DONG Qing,SUN Li,HE Jian Kun.Experimental study on heat transfer of natural convection between horizontal micro-wire and water[J].Journal of Shandong University of Technology:Science and Technology,2007,21(5):85-87. |
| |
| Authors: | DONG Qing SUN Li HE Jian Kun |
| |
| Institution: | 1. School of I.ight Industry and Agriculture Engineering, Shandong University of Technology, Zibo 255049, China; 2. Energy Research Institute of Shandong Academy of Science, Jinan 250014, China |
| |
| Abstract: | The heat transfer of the natural convection of horizontal micro-wire with different outer diameters is experimentally investigated by using the Joule heating.Water is used as the working fluid.The experimental Nusselt number is compared with that of the classical correlations.The experimental results show that the experimental data are less than the correlations values and the experimental data are almost constant.It is the predomination from natural convection to the conjunct effect of natural convection and conduction that results in the phenomenon. |
| |
| Keywords: | Joule heating micro-wire heat transfer of natural convection Nusselt number |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
