Numerical analysis of parameters affecting turbulent boundary layer trailing edge noise

In the present study, one of the most important mechanisms of aerodynamic noise generation is investigated numerically. Large-eddy simulation approach used to solve the unsteady flow equations of turbulent boundary layer with Mach number 0.06 over a flat plate of length 30-cm. Lund's inflow boundary model used to reduce the computational cost. To calculate the parameters affecting trailing edge noise (include surface pressure spectra, spanwise length scale of the surface pressure fluctuations and eddy convection velocity), data acquisition of SPFs values in different points over the flat plate surface done using the probe tool in OpenFOAM software. Finally, the farfield noise predicted using analytical Amiet-Roger model. The results showed that the numerical solution method used in this study, while having reasonable computational cost, has a good ability to predict the effective parameters on the trailing edge noise. In addition, studying the spectral parameters affecting the turbulent boundary layer trailing edge noise showed that prediction and direct estimation of these parameters, while are using in far-field noise prediction models, provide accurate and proper information on physics of the flow and dimensions and life time of turbulent boundary layer vortex structures.