A high-order finite-difference algorithm for direct computation of aerodynamic sound

作者：Daude F; Berland J; Emmert T; Lafon P^*; Crouzet F; Bailly C

来源：Computers & Fluids, 2012, 61: 46-63.

DOI：10.1016/j.compfluid.2011.08.017

• Computational AeroAcoustics
• Large-eddy simulation
• High-order schemes
• Overset grids

A high-order finite-difference algorithm is proposed in the aim of performing LES calculations for CAA applications. The subgrid scale dissipation is performed by the explicit high-order numerical filter used for numerical stability purpose. A shock-capturing non-linear filter is also used to deal with compressible discontinuous flows. In order to tackle complex geometries, an overset-grid approach is used. High-order interpolations make possible the communication between overlapping domains. The whole algorithm is first validated on canonical flow problems to illustrate both its properties for shock-capturing as well as for accurate wave propagation. Then, the influence of the multi-domain approach on the high-order spatial accuracy is assessed. Finally, a rod-airfoil configuration is studied to highlight the potential of the proposed algorithm to deal with multi-scale aeroacoustic applications.

• 出版日期2012-5-30
• 单位中国地震局