采用高阶间断有限元法于非结构网格上针对复杂外形数值求解声学控制方程--线化欧拉方程.背景流场采用有限体积法于结构网格求得,一种高精度数据传递方法将基于有限体积法的背景流场数据传递到声场计算所采用的较为稀疏的非结构网格上,保证了背景流场信息的完整和精确.为提高计算效率,采用了一种更为直接的Quadrature-Free Implementation技术以及网格分区并行技术.数值结果表明采用高阶的情况下即使在稀疏的网格上也可以捕捉到细微的声场结构.%In this paper, the linearized Euler equations (LEE) for aero-acoustics are solved using high-order Discontinuous Galerkin (DG) on unstructured grid for complex geometries. The background field, calculated using Finite Volume Method on structured grid, is first transferred into the LEE grid with a highly accurate method. A straightforward quadrature-free implementation method and parallel computing are used to accelerate the computation. Numerical tests indicate that very detailed features can be resolved even though high order DG was used on very coarse grids.
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