Slit Aspect Ratio Effect on Flow Instability and Heat Transfer Characteristics of Wavy Vortex Flow
Slit Aspect Ratio Effect on Flow Instability and Heat Transfer Characteristics of Wavy Vortex Flow
复制标题
狭缝长宽比对波状涡流流动不稳定性及传热特性的影响
DOI：
10.1007/s13369-019-03884-w
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发表时间：
2019-09
影响因子：
2.9
通讯作者：
Hyoung Bum Kim
中科院分区：
文献类型：
--
作者：
Dong Liu;Siliang Sun;Shicheng Ding;Nana Kofi Amponsah Gyenin;Hyoung Bum Kim
通过改变内筒旋转雷诺数和内外筒壁面温度梯度，研究了不同条件下狭缝长径比对波纹涡流动分布、壁面切应力和换热特性的影响。通过与实验结果的对比，验证了数值模拟的准确性.研究了四种缝宽比的同心圆柱模型内的流场分布。结果表明，狭缝深度对环隙内流动的换热过程有显著影响。结果表明，随着切缝深度的增加，内筒处的壁面剪应力显著减小。模型h *= 0.75的内筒壁面切应力最大。此外，射流状流动和传热强化随着剪切应力的增加而增强。在四种模型中，缝宽比为0.75的模型具有最大的传热增强。
The slit aspect ratio effect on the flow distribution, shear stress at the cylinder and heat transfer characteristics of wavy vortex flow under variable conditions was investigated by changing the rotating Reynolds number of the inner cylinder and temperature gradient between the inner and outer cylinder walls. The accuracy of numerical simulation was validated by comparing the simulation results with the experimental results. The flow field distribution in the concentric cylinder models with four slit aspect ratios was studied. The results of the wavy vortex flow indicated that the slit depth has a remarkable impact on the heat transfer process of the flow in the annulus. It can be found that the wall shear stress at the inner cylinder experiences a significant decrease with slit depth increasing. The wall shear stress at the inner cylinder of modelh*= 0.75 was the largest among four models. Furthermore, jet-like flow and heat transfer enhancement became stronger as shear stress increased. The model with 0.75 slit aspect ratio had the largest heat transfer augmentation among four models.
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影响因子：
4.6
作者：
Eboshogwe Imomoh;J. Dusting;S. Balabani
通讯作者：
Eboshogwe Imomoh;J. Dusting;S. Balabani
影响因子：
2.8
作者：
S. Viazzo;Sébastien Poncet
通讯作者：
S. Viazzo;Sébastien Poncet
影响因子：
6.4
作者：
A. Nouri-Borujerdi;M. E. Nakhchi
通讯作者：
A. Nouri-Borujerdi;M. E. Nakhchi
影响因子：
3.7
作者：
ANDERECK, CD;LIU, SS;SWINNEY, HL
通讯作者：
SWINNEY, HL
DOI：
10.1098/rsta.1923.0008
发表时间：
1923-01-01
影响因子：
--
作者：
Taylor, GI
通讯作者：
Taylor, GI