Slit Wall and Heat Transfer Effect on the Taylor Vortex Flow
Slit Wall and Heat Transfer Effect on the Taylor Vortex Flow
复制标题
DOI：
10.3390/en8031958
复制
发表时间：
2015-03
期刊：
影响因子：
3.2
通讯作者：
Dong Liu;Ying-ze Wang;W. Shi;Hyoung-Bum Kim;A. Tang
中科院分区：
文献类型：
--
作者：
Dong Liu;Ying-ze Wang;W. Shi;Hyoung-Bum Kim;A. Tang
通过实验测量，研究了具有恒温梯度效应的平板模型中的泰勒涡流动，得到了传热过程对泰勒涡流动影响的初步特征。并对平面模型中的流场进行了数值模拟。通过与实验结果的对比，验证了数值模拟的可靠性.为了研究在相同温度梯度条件下缝壁对该流型的影响，考虑了另外三个不同缝数（6、9和12）的模型。涡对沿轴向沿着运动。由于温度梯度的存在，环隙内的轴向流动增强，但内筒附近的径向速度减弱。对不同模型内筒产生的热流进行了比较，发现6缝模型产生的热流比普通模型增加了4.5%，其中12缝模型产生的热流最大，具有最好的传热能力。
The Taylor vortex flow in the plain model with a constant temperature gradient effect was studied by experimental measurement, and the preliminary features of Taylor vortex flow affected by heat transfer process were obtained. This flow field in the plain model was also studied by numerical simulation. The reliability of numerical simulation was verified by comparing the numerical results with the experimental ones. To study the slit wall effect on this flow regime under the same temperature gradient conditions, another three models with different slit numbers (6, 9 and 12) were considered. The vortex pairs were found to have a motion along the axial direction. Because of the existence of the temperature gradient, the axial flow in the annulus gap was enhanced, but the radial velocity near the inner cylinder was found to be weakened. The heat flux generated by the inner cylinder was also compared among different models, and it was found that the heat flux generated by the 6-slit model was increased by 4.5% compared to that of the plain model, and the 12-slit model generated the maximum heat flux, which has the best heat transfer ability.