水平圆管通道内热磁对流的实验研究  

EXPERIMENT STUDY OF MAGNETO THERMAL CONVECTION IN A HORIZONTAL TUBE

作　　者：杨昆仑[1] 任建勋[1] 宋耀祖[1] 

机构地区：[1]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

出　　处：《工程热物理学报》2005年第2期295-297,共3页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展规划资助项目(973 No.G2000026301)

摘　　要：由于温度分布不均匀而导致磁场中的磁性流体受到非平衡的磁场力作用,而发生流动的现象,称为热磁对流。它是一种由体积力驱动的类似自然对流的流动,可以通过设计合适的磁场来控制热磁对流的强度和方向。本文对水平圆管通道内热磁对流进行了实验研究,测量了通道内及壁面的温度分布,并通过两种不同的方法根据实验测得的温度分布估算了热磁对流的流量和速度的大小。Free convection in magnet field caused by inhomogeneous temperature is called Magne-tothermal convection; it is droved by magnetic force familiar with natural convection droved by gravity. But magnets can be well designed to control the intensities and direction of this kind of convection. A horizontal tube in magnet field heated slightly off the field center was studied in this article. The temperature distributions on axes and wall were presented, according to which the flux and velocity of the Magnetothermal convection was calculated. The result shows that an obvious Magnetothermal convection in the horizontal tube was induced by the electromagnet.

关 键 词：热磁对流 磁场 对流 圆管 

分 类 号：TK124[动力工程及工程热物理—工程热物理]