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Post-processing of a high-accuracy Large-Eddy Simulation solution in application to turbulent jet noise modelling Contact: Dr. Sergey Karabasov ([email protected]) Turbulent jet noise remains one of the biggest challenges in the aircraft noise modelling. Recently, a new hybrid acoustic analogy model for jet noise prediction has been developed in Cambridge University Engineering Department within an EPSRC funded project. The model is based on solving linearised Euler equations for sound propagation and modelling the statistics of turbulent acoustic source within a Large Eddy Simulation (LES) framework. In the previous work, LES data have been post-processed with Fortran and Matlab routines, and the fourth-order two-point two-time correlation functions of the turbulent velocity field components and, consequently, the acoustic source amplitudes, space and time scales, have been obtained. (http://www-diva.eng.cam.ac.uk/energy/acoustics/jetnoise.html) This UROP project will be devoted to obtaining the correlation coefficients and the associated source scales from a highly accurate LES solution of an isothermal axisymmetric jet. The LES data will be provided by Dr. Christophe Bogey in the Centre Acoustique in Ecole Centrale de Lyon (ECL) (http://acoustique.ec-lyon.fr/indexuk.php). The outcome of the project is expected to lead to improved sound prediction and may initiate a further collaboration with ECL and open new research opportunities. The duration of the project will be, approximately, 3-4 months.
