三维分区算法在复杂多连域湍流问题中的应用

Application of multi block technique in 3D complex turbulent flow with multiply-connected domain

提出并实现了一种适合于任意曲线坐标系下非交错网格系统的流体力学数值模拟的三维分区算法 ,通过三维立方块绕流问题对其进行了考证和优化工作 ,证明有良好、稳定的工作性能。在此基础上 ,将该算法有效地应用到了具有典型多连域特征的涉及内外流耦合作用的串列双空气冷却塔定常绕流流动问题 。

This work applies multi block technique in an arbitrary curvilinear coordinate system to calculate complex 3D turbulent flows. The present multi block approach is realized through overlapping neighboring computational subdomains which had been first set up to meet the required flow problem. The performance of the present approach was validated in the flow around a cube mounted on one side of a channel. Very good agreement is achieved in the computational results of one block and multi-block approaches. The computation was then further performs on flow around two dry cooling towers in tandem arrangement. The calculation with 5-block approach highlighted the complex flow pattern, which is very difficult to achieve with the conventional one block approach.