用格子玻尔兹曼方法对微圆管管束外混合对流的换热情况进行了数值模拟研究。在充分验证程序正确性的基础上,对混合流动绕流时不同壳侧进液角度,不同雷诺数Re以及瑞利数Ra等方面对传热的影响进行模拟研究,对衡量传热效果的Nu数及温度场进行了对比,总结出了换热规律。为高效微管换热器的开发提供了理论指导。
The influence of flow direction on heat transfer of mixed convection fluid flowing across a tube bundle was simulated using Lattice Boltzmann Method.The correctness of our program was fully verified firstly.Then several influential factors for the overall heat transfer of the tube bundle was investigated,such as the installation angles for the liquid pipe of MTHE shell side,Reynolds numbers and Rayleigh number.The averaged Nusselt numbers and temperature fields for various situations were compared.The effects of incoming direction of fluid flow across a tube bundle was summarized which is helpful for designing a efficient micro-tube bundle heat exchanger.
参考文献
| [1] | Y. Y. Yan;Y. Q. Zu .Numerical simulation of heat transfer and fluid flow past a rotating isothermal cylinder - A LBM approach[J].International Journal of Heat and Mass Transfer,2008(9/10):2519-2536. |
| [2] | Peng Y;Shu C;Chew YT;Inamuro T .Lattice kinetic scheme for the incompressible viscous thermal flows on arbitrary meshes[J].Physical review.E.Statistical physics, plasmas, fluids, and related interdisciplinary topics,2004(1 Pt.2):6703-1-6703-8-0. |
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