The Impacts of Five Different Turbulence Models on the Accuracy of Computational Aeroacoustic Results for an Airfoil and Acoustic Localization Analysis for Well Suited Model

摘要: The research consists of two main sections; it initially focused on the accuracy turbulence models to simulate acoustic far-field domain for a NACA 0012 airfoil at Mach number 0.209. Five different were used such as realizable k-e, SST k-ω, Transition-SST, Reynolds-Stress, and Spalart-Allmaras in unsteady flow velocity 71.3 m/s. It Ffowcs-William Hawkings (FW-H) method compare one-third-octave-band semi-logarithmic sound pressure level (SPL) vs. frequency within range 200 Hz 20000 with experimental data. Reasonably good agreement is observed that both k- e Transition-SST are more accurate than others prediction peak peak. In second section, retrospect considering k-e model its shorter runtime, paper considered some analysis find critical points fluctuated due retard time. For this reason, need way input location receiver data other located receivers was felt. Indeed, defined major distributions, semi-circle linear distribution, each one has nineteen receivers. These distributions have mathematical correlations derived their own subsection. also introduces parameter, Average-Dependable SPL, order analyze effect time fluctuations. After specification six schematic contours, developed third distribution corresponds proportion chord. Finally, can be majority peaks occur close turbulent boundary layer trailing edge, but quantity near leading edge substantial