Article

Numerical methods of Computational Aeroacoustics with a focus on the Hybrid Approach (en)

* Presenting author
Day / Time: 06.03.2023, 13:40-14:05
Room: Saal X11-12
Typ: Vorkolloquium
Abstract: Noise generated from aeroacoustic applications can be predicted by different methods. Relevant methods are analytical and empirical models, a hybrid (two-step) approach, and a direct simulation of flow-induced sound by solving the (compressible) conservation equations. In recent years, the hybrid approach has become a powerful method to simulate the acoustic field efficiently and reliably. A typical Computational Aeroacoustics (CAA) model solved in a hybrid style consists of two simulation steps. First, the flow field is computed by a Computational fluid dynamics (CFD) simulation and the aeroacoustic sources are calculated. Second, the Computational Acoustic (CA) model is solved to obtain the sound field. In this talk, we will present relevant numerical methods to achieve accurate results using a hybrid approach for predicting flow-induced sound generation of low Mach number flows. Details will be shown for the EAA radial fan benchmark case and a confined pipe-flow case. The results of both applications were achieved using the perturbed convective wave equation as the CAA model.
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