TY - JOUR N2 - A hybrid artificial boundary condition (HABC) that combines the volume-based acoustic damping layer (ADL) and the local face-based characteristic boundary condition (CBC) is presented to enhance the absorption of acoustic waves near the computational boundaries. This method is applied to the prediction of aerodynamic noise from a circular cylinder immersed in uniform compressible viscous flow. Different ADLs are designed to assess their effectiveness whereby the effect of the mesh-stretch direction on wave absorption in the ADL is analysed. Large eddy simulation (LES) and FW-H acoustic analogy method are implemented to predict the far-field noise, and the sensitivities of each approach to the HABC are compared. In the LES computed propagation field of the fluctuation pressure and the frequency-domain results, the spurious reflections at edges are found to be significantly eliminated by the HABC through the effective dissipation of incident waves along the wave-front direction in the ADL. Thereby, the LES results are found to be in a good agreement with the acoustic pressure predicted using FW-H method, which is observed to be just affected slightly by reflected waves. L1 - http://www.journals.pan.pl/Content/110265/PDF/aoa.2019.126357.pdf L2 - http://www.journals.pan.pl/Content/110265 PY - 2019 IS - No 1 EP - 116 DO - 10.24425/aoa.2019.126357 KW - cylinder aerodynamic noise KW - non-reflecting boundary conditions KW - large eddy simulation KW - FW-H acoustic analogy KW - acoustic damping layer A1 - Ma, Ruixian A1 - Liu, Zhansheng A1 - Dooloan, Con J. A1 - Moreau, Danielle J. A1 - Czarnecki, MichaƂ PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 44 DA - 2019.03.11 T1 - Hybrid Artificial Boundary Conditions for the Application of Blunt-Body Aerodynamic Noise Prediction SP - 105 UR - http://www.journals.pan.pl/dlibra/publication/edition/110265 T2 - Archives of Acoustics ER -