- Tytuł:
- Hybrid Artificial Boundary Conditions for the Application of Blunt-Body Aerodynamic Noise Prediction
- Autorzy:
-
Ma, Ruixian
Liu, Zhansheng
Doolan, Con J.
Moreau, Danielle J.
Czarnecki, Michał - Powiązania:
- https://bibliotekanauki.pl/articles/177080.pdf
- Data publikacji:
- 2019
- Wydawca:
- Polska Akademia Nauk. Czasopisma i Monografie PAN
- Tematy:
-
cylinder aerodynamic noise
non-reflecting boundary conditions
large eddy simulation
FW-H acoustic analogy
acoustic damping layer - Opis:
- 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.
- Źródło:
-
Archives of Acoustics; 2019, 44, 1; 105-116
0137-5075 - Pojawia się w:
- Archives of Acoustics
- Dostawca treści:
- Biblioteka Nauki
Artykuł