Numerical study of an acoustic field effect on boundary layer transition mechanism December 1, 2023 Z Rarata A Drozdz R Gnatowska V Sokolenko W Elsner S Kubacki Acoustic Excitation Acoustic Feedback Loop Kelvin-Helmholtz Instabilities Laminar-to-Turbulent Transition Mechanism Large Eddy Simulations Naca 0012 Airfoil Wavy Surface Modified Airfoils