| 离心力场作用下多孔介质中强制对流换热的研究 |
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| 引用本文： | 施明恒,王海,郝英立.离心力场作用下多孔介质中强制对流换热的研究[J].工程热物理学报,2002,23(4):473-475. |
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| 作者姓名： | 施明恒 王海 郝英立 |
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| 作者单位： | 东南大学洁净煤发电及燃烧技术教育部重点实验室,江苏,南京,210096 |
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| 基金项目： | 国家重点基础研究发展规划资助项目（No.NG2000026303） |
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| 摘 要： | 对离心流化床中空气通过多孔物料层的强制对流换热进行了理论和实验研究。获得了气流和物料间强制对流换热的准则关联式。研究结果表明,在气流速度和温度梯度方向一致的条件下,强制对流换热比通常的边界层强制对流换热有所强化,其换热的准则关联式具有 Nu=CRePr的线性形式。从而验证了改变气流方向和热流密度矢量之间夹角可以强化换热的这一强化传热新原理。
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| 关 键 词： | 对流换热 多孔物料 离心力 强化传热 |
| 文章编号： | 0253-231X(2002)04-0473-03 |
| 修稿时间： | 2001年12月6日 |
STUDY ON FORCED CONVECTIVE HEAT TRANSFER IN CENTRIFUGAL FLUIDIZED BED |
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| SHI Ming-Heng,WANG Hai,HAO Ying-Li.STUDY ON FORCED CONVECTIVE HEAT TRANSFER IN CENTRIFUGAL FLUIDIZED BED[J].Journal of Engineering Thermophysics,2002,23(4):473-475. |
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| Authors: | SHI Ming-Heng WANG Hai HAO Ying-Li |
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| Abstract: | Forced convective heat transfer in centrifugal fluidized bed was conducted both theoret-ically and experimentally. A heat transfer correlation in the form of Nu = CRePr was obtained. The results show that heat transfer can be enhanced when gas flow direction is parallel with tempera-ture gradient direction. It demonstrate the new principle of convective heat transfer enhancement by changing the angle between fluid flow and heat flux. |
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| Keywords: | convective heat transfer porous media centrifugal force heat transfer enhancement |
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