Computation of trailing-edge noise due to turbulent flow over an airfoil

Application of the variational formulation of Lighthill's acoustic analogy to trailing-edge noise is considered. Use is made of this formulation to study the effect of finiteness of the chord and the variation of far-field pressure directivity with frequency. Numerical analytical solution results are validated for certain limiting cases. Use is also made of this methodology to calculate the far-field acoustic pressure for a low-Mach-number turbulent flow. To determine the acoustic sources for this problem, we employ an unstructured mesh, large eddy simulation of the incompressible Navier-Stokes equations.