Towards the use of Lattice Boltzmann Method for full aircraft noise prediction. Seminar

Abstract

The current status of Lattice Boltzmann simulation of aircraft noise generation and radiation at component level is outlined with emphasis on the most recent validation studies carried out by Exa Corporation using the CFD software PowerFLOW. After a preliminary overview of the underlying elements of the LBM-VLES methodology and its deployment in the aerospace field to tackle aerodynamic, acoustic and thermal applications, the presentation focuses on the problem of airframe (landing gear and high-lift) and engine (jet and fan) noise prediction. The current software reliability status is critically reviewed in relation to the main uncertainties affecting the numerical models and the experimental data. An outlook on the use of the LBM for the computation of noise certification level of a full aircraft is finally provided by presenting the first version of a demonstration platform developped by Exa to trace and push the current limits of the noise prediction capabilities, both in terms of physical modelling and software requirements.