永磁梯度磁场布置方式对空气自然对流换热的影响
Influences of permanent gradient magnetic field configurations on air natural convection heat transfer
查看参考文献15篇
文摘
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梯度磁场可用于控制非导电弱磁性介质的自然对流换热过程。利用钕-铁-硼永磁系统的不同空间布置,构建了具有不同磁场强度分布的梯度磁场,通过数值模拟得到了不同永磁梯度磁场的磁场强度和磁加速度。对不同梯度磁场作用下的二维封闭腔内的空气自然对流换热过程进行了数值研究,获得了空气自然对流的流场和温度场,以及壁面局部Nusselt数和平均Nusselt数并进行了比较。结果表明:空气自然对流换热可以通过施加具有不同磁加速度的梯度磁场得到强化或控制。 |
其他语种文摘
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The natural convection heat transfer of electrically non-conducting fluids can be controlled by gradient magnetic field.The gradient magnetic fields with different profiles of magnetic field intensity were set up by various configurations of neodymium-iron-boron permanent magnet system.The magnetic field intensities and magnetic accelerations for differently configured gradient magnetic fields were obtained by numerical simulation.The natural convection heat transfer of air in a two-dimensional enclosure that was placed in different gradient magnetic fields was numerically investigated.The flow and temperature fields for the air natural convection were presented and the local and mean Nusselt numbers on the walls were calculated and compared.The results showed that the natural convection heat transfer of air can be enhanced or controlled by applying permanent gradient magnetic fields with different magnetic accelerations. |
来源
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化工学报
,2007,58(12):2980-2985 【核心库】
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关键词
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梯度磁场
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自然对流换热
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传热强化
;
磁加速度
;
数值模拟
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地址
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华北电力大学(北京), 电站设备状态监测与控制教育部重点实验室;;能源的安全与清洁利用北京市重点实验室, 北京, 102206
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语种
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中文 |
ISSN
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0438-1157 |
学科
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能源与动力工程 |
基金
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国家自然科学基金
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文献收藏号
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CSCD:3044834
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参考文献 共
15
共1页
|
1.
Carruthers J R. Magnetothermal convection in insulating paramagnetic fluids.
J Appl Phys,1968,39(12):5718-5722
|
被引
8
次
|
|
|
|
2.
Braithwaite D. Magnetically controlled convection in a paramagnetic fluid.
Nature,1991,354:134-136
|
被引
21
次
|
|
|
|
3.
Gray D D. Two-dimensional magnetothermal plumes.
International Journal of Engineering Science,2001,39:1837-1861
|
被引
4
次
|
|
|
|
4.
Tagawa T. Magnetization force modeled and numerically solved for natural convection of air in a cubic enclosure:effect of the direction of the magnetic field.
Int J Heat Mass Transfer,2002,45(2):267-277
|
被引
6
次
|
|
|
|
5.
Bednarz T. Magnetic and gravitational convection of air with a coil inclined around the x axis.
Numerical Heat Transfer:Part A:Applications,2004,46(1):99-113
|
被引
1
次
|
|
|
|
6.
Shigemitsu R. Numerical computation for natural convection of air in a cubic enclosure under combination of magnetizing and gravitational forces.
Numerical Heat Transfer:Part A:Applications,2003,43(5):449-463
|
被引
3
次
|
|
|
|
7.
Uetake H. Thermal convection control by gradient magnetic field.
J Appl Phys,2000,87(9):6310-6312
|
被引
8
次
|
|
|
|
8.
杨立军. 不同磁场布置对空气自然对流的影响.
太阳能学报,2003,24(3):413-420
|
被引
10
次
|
|
|
|
9.
杨立军. 梯度磁场作用下自然对流换热强化.
化工学报,2005,56(7):1181-1186
|
被引
7
次
|
|
|
|
10.
Wakayama N I. Control of vertical acceleration(effective gravity)between normal and microgravity.
AIChE Journal,2001,47(12):2640-2643
|
被引
5
次
|
|
|
|
11.
Huang J. Magnetic control of convection in nonconducting paramagnetic fluids.
Phys Rev E,1998,57(1):29-
|
被引
1
次
|
|
|
|
12.
Huang J. Thermoconvective instability of paramagnetic fluids in a nonuniform magnetic field.
Phys Rev E,1998,57(5):5564-5571
|
被引
3
次
|
|
|
|
13.
Huang J. Magnetic control of convection in nonconducting diamagnetic fluids.
Phys Rev E,1998,58(4):5164-5167
|
被引
7
次
|
|
|
|
14.
Qi J W. Attenuation of natural convection by magnetic force in electro-nonconducting fluids.
Journal of Crystal Growth,1999,204(3):408-412
|
被引
1
次
|
|
|
|
15.
Yang L J. Free convection of a gas induced by a magnetic quadrupole field.
Journal of Magnetism and Magnetic Materials,2003,261(3):377-384
|
被引
12
次
|
|
|
|
|