Comparison of fluid flow and heat transfer behavior in outer and inner half coil jackets and field synergy analysis
Comparison of fluid flow and heat transfer behavior in outer and inner half coil jackets and field synergy analysis
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DOI：
10.1016/j.applthermaleng.2011.05.001
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发表时间：
2011-10
影响因子：
6.4
通讯作者：
Yaxia Li;Jianhua Wu;Li Zhang;L. Kou
中科院分区：
文献类型：
--
作者：
Yaxia Li;Jianhua Wu;Li Zhang;L. Kou
本文对两种半盘管夹套（外半盘管夹套和内半盘管夹套）内的流动和传热特性进行了数值研究。采用SIMPLE算法和控制容积法计算了两种夹套内的流场和温度场。进一步研究了轴向压力梯度、夹套结构参数和传热流体性质对传热和流体动力性能的影响。建立了两种夹套的传热系数和摩擦系数的关联式。基于场协同原理，得出了要进一步提高两半盘管夹套的传热效率，必须改善半圆形截面对称轴附近的流场的结论。
The article presents a numerical study on the developed flow and heat transfer behaviors in the two types of half coil jackets i.e. outer and inner half coil jackets. The computations based on the control volume method with SIMPLE algorithm have been conducted to give the flow and temperature fields in both jackets. Further the effect of axial pressure gradient, jacket structure parameters and heat transferring fluid property on the heat transfer and hydrodynamic performance are also studied. The correlations of heat transferring and friction coefficients have been developed for both jackets. Based on field synergy principle, the conclusion has been drawn that in order to further enhance heat transfer rate of both half coil jackets, the flow fields near the symmetric axis of the semicircular cross section should be improved.