Numerical simulation of time-dependent heat transfer in oscillating pipe flow
Numerical simulation of time-dependent heat transfer in oscillating pipe flow
复制标题
振荡管流中随时间传热的数值模拟
DOI：
10.2514/3.277
复制
发表时间：
1990
影响因子：
2.1
通讯作者：
U. Kurzweg
中科院分区：
文献类型：
--
作者：
J. Zhang;U. Kurzweg
本文对管内振荡流动中轴向强化换热问题进行了数值研究。得到了不同沃默斯利数下随时间变化的速度和温度分布以及拉格朗日位移和潮汐位移。计算了不同潮汐位移下的增强轴向热通量。研究了EAHT的壁厚效应，在试验案例中，最佳壁厚为管道半径的20%左右。此外，对轴向热流的调谐效应进行了研究，结果与分析预测结果吻合较好。数值研究表明，对于那些必须在没有对流质量交换的情况下传输大量热量的问题，EAHT是一种非常有效的工具。
The problem of Enhanced Axial Heat Transfer (EAHT) in oscillatory pipe flow has been numerically studied. Time-dependent velocity and temperature profiles and Lagrangian and tidal displacements at various Wormersley numbers are obtained. The enhanced axial heat flux for different tidal displacements is calculated. The wall thickness effect in EAHT is also studied, and the optimum wall thickness is shown to be about 20% of the pipe radius in the test case studied. In addition, the tuning effect in axial heat flow is examined, the results indicating good agreement with analytic predictions. The numerical studies show that EAHT can be a very effective tool for those problems in which a large amount of heat must be transported without an accompanying convective mass exchange.