Numerical analysis of an aeroacoustic field using Complex Variable Method

Eric Gaudard , Régis Marchiano , Philippe Druault (1) , François van Herpe (2)

1 DALEMBERT - Institut Jean Le Rond d'Alembert
2 PSA Peugeot Citroën

This study deals with identification and characterization of aeroacoustic sources in turbulent flows. Analysis of aeroacoustic noise generation and propagation often requires huge amount of data. Here, a versatile method called Complex Variables Method (CVM) is proposed. It is a powerful tool dedicated to analyze numerical simulations by adding a small imaginary part to variables and parameters, without post- processing. Depending on the initialization of these imaginary parts, CVM provides different informations. The method is illustrated with numerical simulations showing that it can be efficiently used to get the sensibility to various parameters or to distinguish and follow the acoustic part in the total fields.

Mots clés: aeroacoustic; tracking; analysis

Domaines: Acoustique [physics.class-ph]

Eric Gaudard, Régis Marchiano, Philippe Druault, François van Herpe. Numerical analysis of an aeroacoustic field using Complex Variable Method. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811035⟩