基于ICEM CFD对汽轮机末级三维叶片流场网格划分方法的优化

摘要

网格的划分是对工程问题进行数值模拟的重要环节,网格质量的高低直接影响计算结果的精度.在对汽轮机叶片周围流场的数值模拟过程中,较高质量的网格是基础要求,但由于汽轮机末级叶片结构非常复杂,这就加大了其网格划分过程中的难度.为了进一步提高ICEM CFD对汽轮机叶片周围流场网格划分的质量,并针对避免产生“负体积”的问题.提出了一种可以得到高质量网格的方法,并阐述了在实际操作中应该注意的事项.%The mesh generation is an important part of the numerical simulation of engineering problems. Ihe quality ot the grid directly affects the accuracy of the calculation result. The last stage turbine blade has a very complicated structure, which increase the difficulty in the process of grids partition. However,the flow field computation around the steam turbine blade needs higher quality grid. In order to improve the grid quality of the flow field around steam turbine blades with ICEM CFD and to avoid "negative volume" , this paper puts forward a method which can generate high-quality grids . What' s more,it illustrates what matters should be paid attention to in practice.