Sensibility analysis and wave tracking of sound

Identi cation and characterization of aeroacoustic sources in turbulent ows are important scienti c challenges. Indeed, it is important to know the exact position and type of acoustic sources in order to reduce the noise generated. Numerical analysis of aeroacoustic noise generation and propagation often requires huge amount of data. Here, a versatile method called Complex Variable Method (CVM) is proposed. It is a powerful tool dedicated to analyze numerical simulations. It is shown that the CVM allows to make sensibility analysis or to track chosen part of waves propagating through the ow. Those theoretical results are illustrated with numerical simulations of noise generated in a ow passing over a cavity separated from the ow by an elastic structure. They show that the method can be e ciently used to get the sensibility to various parameters or to distinguish and follow the acoustic part in the aeroacoustic eld, even coupled to elastic structures.