Engineer in aero-acoustics

One of the traditional research themes of the LAUM is aero-acoustics, and more specifically the influence of flows on sound propagation and acoustic treatments. This is a very rich research topic, corresponding to a strong industrial demand, and raising fundamental questions on the interaction between sound and flow, particularly the effects generated in the vicinity of walls. A large part of the work carried out at the LAUM in this context concerns these wall effects, linked to the presence of liners, with the problem of defining impedance conditions, corrugations, or perforated plates. In addition to their relevance for the optimisation of acoustic treatments for aeronautics, this work has also highlighted remarkable phenomena such as non-reciprocal reflections, slow waves and the analogous study of black holes, or non-Hermitian acoustics which exhibit unusual properties obtained by adjusting the losses and gains in a system (PT-symmetry, acoustic diode, no- reflection modes).
The LAUM has developed several test benches for the characterisation of acoustic treatments in the presence of flow and high noise levels. The objective is to precisely control the acoustic field and the flow to characterise precisely the interactions between a sound wave, the hydrodynamic field and the acoustic treatment.
The main role of the research engineer will be the development of these test rigs, the planning and delivery of test campaigns, the data post-processing and analysis. This implies knowledge and previous experience in the fields of aerodynamics (wind tunnel, flow profile measurements, drag measurements) and/or acoustics (impedance eduction and acoustic antennas). You will join the Research Operation PAME (Acoustic Propagation and Materials with Flow), a team of 4 permanent researchers and about ten doctoral and post-doctoral researchers working on similar research topics.

This position will involve the following tasks and responsibilities:
– Conduct acoustic (impedance eduction, scattering matrices measurements) and flow measurements (in particular, drag evaluation) of the different liner concepts. You will interpret and validate these results.
– Perform Pitot and/or optical (PIV, LDV) measurements of the flow above these liners in order to link the flow parameters to measured impedance with flow.
– Contribute to the development of the post-processing algorithms for liner impedance eduction.
– Participate in the maintenance of the facilities.
– Propose research subjects and the associated experimental protocols.
– Present research results in conferences and publish scientific papers