磁场对多孔介质方腔内空气热磁对流的影响  

NUMERICAL ANALYSIS OF THE EFFECT OF AN INCLINED COIL ON THERMOMAGNETIC CONVECTION OF AIR IN A POROUS CUBIC ENCLOSURE

作　　者：姜昌伟[1] 李贺松[2] 陈冬林[1] 石尔[1] 朱先锋[1] 李茂[2] 

机构地区：[1]长沙理工大学能源与动力工程学院,长沙410004 [2]中南大学能源科学与工程学院,长沙410083

出　　处：《力学学报》2012年第1期23-29,共7页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金(51004115);湖南省科技计划项目(05FJ4054)资助项目~~

摘　　要：数值分析了微重力下圆形载流线圈倾斜时多孔介质方腔内空气热磁对流.磁场计算采用毕奥-萨伐定律求解;动量方程与能量方程分别采用达西模型与局部热非平衡模型求解.计算结果表明随着磁场力数γ数和Da数的增加,方腔内对流变得越来越强.线圈倾斜角x_(euler)从0°到90°变化时,对流结果关于z_(euler)=45°呈现对称分布.Nμ_m数随线圈倾斜角的改变而变化且每个工况下局部最大Nμ_m数出现在z_(euler)=45°.局部最小Nμ_m数出现在z_(euler)=0°,90°.Thermomagnetic convection of air in a porous cubic enclosure with an inclined electric coil is numerically investigated under microgravity environment. Biot-Savart＇s law was used to calculate magnetic field. The momentum equations and energy equations were solved by the Darcy Model and the local thermal non-equilibrium model. The results show that the natural convection of air is strengthened in the porous cubic enclosure with the increase of ~/number and Da number. The resulted convection is symmetrical in terms of the angle at Xeuler = 45~ when the range of inclination angle is from 0° to 90°. The coil inclination changes the Num number and a local maximum is obtained at Xeuler ： 45° for every case. Local minima are obtained at xeuler 0° and 90°.

关 键 词：热磁对流 数值模拟 多孔介质 载流线圈 局部热非平衡模型 

分 类 号：TK124[动力工程及工程热物理—工程热物理]