PARAMETRIC DATA GENERATION OF SLAT-AIRFOIL CONFIGURATIONS USING LATTICE BOLTZMANN METHOD
Résumé
A novel parametric data generation methodology for slat-airfoil configurations, which can aid in datainformed statistical noise modelling at low Mach numbers is developed. The methodology relies on simplified LBM simulations with a resolved near field that is coupled to a Ffowcs Williams-Hawkings (FWH) solver for far field noise predictions. The solvers are applied to a simplified slat-airfoil configuration without flap that has been developed in the EU-Project Valiant for slat noise studies and for which wind tunnel test results from ECL are available for comparison. The present methodology is first validated on the full geometry of the wind tunnel by comparing the wall pressure spectra calculations with experiments. Then a simplified uniform free flow condition is used for the parametric study. Its main advantage is to avoid expensive modelling of the original experimental setup. Two slightly modified configurations are then compared with the reference setting, one with modified slat gap and the other with a modified slat deflection angle.
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