| 不同旋转条件下多孔介质中自然对流的稳定性分析 |
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| 引用本文： | 夏婕,常海萍. 不同旋转条件下多孔介质中自然对流的稳定性分析[J]. 中国科学技术大学学报, 2006, 36(6): 646-650 |
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| 作者姓名： | 夏婕 常海萍 |
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| 作者单位： | 南京航空航天大学能源与动力学院,江苏南京,210016 |
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| 基金项目： | 国家自然科学基金（50276027）和国防基础科研项目（J1400D001）资助. |
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| 摘 要： | 对离心力场下多孔介质中的自然对流进行了线性稳定性分析，考虑了离心力、哥氏力与重力的共同作用。结果表明：当离心力与温度梯度垂直时，多孔介质中将发生离心力、重力与哥氏力共同驱动的无条件自然对流；当离心力与温度梯度平行时，多孔介质中将发生离心力、重力与哥氏力共同驱动的有条件自然对流，并且重力与哥氏力对自然对流的稳定性判据均无影响。
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| 关 键 词： | 多孔介质 自然对流 稳定性 旋转 封闭腔体 |
| 文章编号： | 0253-2778(2006)06-0646-05 |
| 收稿时间： | 2005-04-19 |
| 修稿时间： | 2006-04-10 |
Stability analysis of natural convection in porous medium under different rotating conditions |
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| XIA Jie,CHANG Hai-ping. Stability analysis of natural convection in porous medium under different rotating conditions[J]. Journal of University of Science and Technology of China, 2006, 36(6): 646-650 |
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| Authors: | XIA Jie CHANG Hai-ping |
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| Affiliation: | College of Energy and Power Engineering, Nanj ing University of Aeronautics and Astronautics, Nanjing 210016,China |
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| Abstract: | The analytical method of linear stability was applied to the natural convection in porous medium considering the action of gravity, centrifugal and Coriolis forces together in a centrifugal force field. The results show that when temperature gradients are perpendicular to the centrifugal force, unconditional natural convection induced by gravity, centrifugal and Coriolis forces in porous medium will occur. However, when temperature gradients are collinear with the centrifugal force, conditional natural convection induced by gravity, centrifugal and Coriolis forces in porous medium will occur. Furthermore, gravity and Coriolis forces have no effect on the stability criterion of natural convection. |
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| Keywords: | porous medium natural convection stability rotation enclosure |
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