Heat transfer in a small gap between co-axial rotating cylinders
Heat transfer in a small gap between co-axial rotating cylinders
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DOI：
10.1016/j.icheatmasstransfer.2006.02.012
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发表时间：
2006-07
影响因子：
7
通讯作者：
S. Tzeng
中科院分区：
文献类型：
--
作者：
S. Tzeng
本文研究了同轴旋转圆柱的局部换热。在旋转圆柱的内部流场中，无量纲参数包括旋转雷诺数（ReΩ）和浮力参数（Gr）。该试验台设计成内筒旋转，外筒静止。测量了内、外筒轴向局部温度分布。在实验条件下，旋转雷诺数的取值范围为2400≤ReΩ≤ 45，000。实验结果表明，旋转雷诺数的增加是随着换热系数分布的增加而增加的。最后，关联了壁面局部换热率，并与现有文献进行了比较。
This paper investigates the local heat transfer of a co-axial rotating cylinder. In the inner flow field of the rotating cylinder, the dimensionless parameters include the rotational Reynolds number (ReΩ) and buoyancy parameter (Gr). The test rig is designed to make the rotating in the inner cylinder and stationary in the outer cylinder. The local temperature distributions of the inner and outer cylinder on axial direction were measured. Under the experimental condition, whereas the ranges of the rotational Reynolds number are 2400≤ReΩ≤45,000. Experimental results reveal that the rotational Reynolds number's increase is with the heat transfer coefficient distributions increase types. Finally, the local heat transfer rate on the wall are correlated and compared with that in the existing literature.