| 梯度磁场作用下自然对流换热强化 |
| |
| 引用本文： | 杨立军,杨昆仑,任建勋,宋耀祖. 梯度磁场作用下自然对流换热强化[J]. 化工学报, 2005, 56(7): 1181-1186 |
| |
| 作者姓名： | 杨立军 杨昆仑 任建勋 宋耀祖 |
| |
| 作者单位： | 华北电力大学（北京）动力工程系，电站设备状态监测与控制教育部重点实验室，北京 102206;清华大学工程力学系，传热强化与过程节能教育部重点实验室，北京 100084 ; |
| |
| 基金项目： | 国家重点基础研究发展规划项目（G20000263）;国家自然科学基金项目（50476013）. |
| |
| 摘 要： | 为验证梯度磁场作用下自然对流换热的变化规律，揭示热磁对流现象的机理，利用钕铁硼永磁体构建了楔形梯度磁场空间，并对位于该空间的封闭腔内的氧气自然对流换热进行了实验研究.实验获得了氧气自然对流的激光散斑干涉图像，通过数据处理得到了氧气自然对流的温度场，进而获得了壁面局部Nu分布.结果表明，磁加速度近似与重力加速度方向相同的永磁梯度磁场布置可使氧气自然对流换热过程得到强化.
|
| 关 键 词： | 自然对流 换热强化 梯度磁场 磁加速度 |
| 文章编号： | 0438-1157（2005）07-1181-06 |
| 收稿时间： | 2004-05-13 |
| 修稿时间： | 2004-05-13 |
Natural convection heat transfer enhancement by gradient magnetic field |
| |
| YANG Lijun,YANG Kunlun,Ren Jianxun,Song Yaozu. Natural convection heat transfer enhancement by gradient magnetic field[J]. Journal of Chemical Industry and Engineering(China), 2005, 56(7): 1181-1186 |
| |
| Authors: | YANG Lijun YANG Kunlun Ren Jianxun Song Yaozu |
| |
| Abstract: | The wedge-shaped space of the gradient magnetic field composed of neodymium iron boron was set up and experimental research on the natural convection heat transfer of oxygen gas in enclosure was presented based on magnetothermal convection induced by the gradient magnetic field, The laser speckle interferometry image for the natural convection of oxygen gas was obtained and the local Nusselt numbers as well as the temperature field could thus be derived. The results showed that the natural convection of oxygen gas was enhanced by using the gradient magnetic field in which magnetic acceleration is almost identical with gravitational acceleration in direction. |
| |
| Keywords: | natural convection heat transfer enhancement gradient magnetic field magnetic acceleration |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载免费的PDF全文 |
