Evaluation of Measured Anisotropic Turbulent Two-Point Correlation Data for the Accurate Prediction of the Turbulence Noise Sources (original) (raw)

Noise emitted from 2D subsonic airfoil sections is heavily influenced by the turbulent boundary layer characteristics at the trailing edge. The objective is to conduct wind tunnel measurements of two-point turbulent velocity correlations to analyze near-wake flow structures, assess measurement data for comparability with numerical results, and develop a relationship linking isotropic theory to anisotropic measurement data. Experiments were performed on two airfoils using X-wire probes, leading to the development of methods for accurately evaluating anisotropic turbulence integral correlation length scales, significantly enhancing the prediction of turbulence noise sources, which is essential for improving noise prediction methods for wind turbine applications.