【摘要】 本文应用湍流大涡模拟方法对三维空间的弯管流进行了数值模拟。计算中使用了隐含流线迎风耗散作用的具有三阶部分展开的 Taylor_ Galerkin离散格式 ,导出了经 Gauss滤波后的基本方程组的有限元列式。数值计算结果与实验结果符合较好 ,表明具有适当计算格式的湍流大涡模拟方法适用于边界形状复杂和存在各向异性大尺度涡的流动仿真更多还原

【Abstract】 The numerical simulation for a three-dimensional curved duct flow was carried out by means of the large eddy simulation (LES). Taylor-Galerkin discretization schemes of partly third-order expansion with implied streamline up-winding dissipation was used in the calculation. The finite element expressions of the basic equations after the Gauss filtering were deduced. The numerical results agree well with the available experimental data. It is indicated that the method of LES with reasonable scheme is applicable in the simulation of large scale anisotropic vortices with complex geometrical boundary.更多还原