Numerical and experimental investigation of wavy leading edge modifications on NACA0012 airfoil performance

This thesis presents numerical and experimental studies on aerodynamic and aeroacoustic characteristics of the NACA0012 profile. The leading-edge serrations under investigation are in a sinusoidal profile with two main design parameters of wavelength and amplitude. Noise suppressing ability of sinusoidal serrations is the function of several parameters like amplitude, wavelength, inflow speed, angle of attack and frequency range which are examined in this thesis. Amplitude and wavelength of the serration are varied between 1.25< A<2.5, 20<60, respectively. The corresponding Reynolds numbers are between 1x105 and 3x105, respectively. The angle of attack for each configuration is changed between 4°12°, also means that after stall increases the angle of attack, serration adversely affects aerodynamic performance.