Numerical Study on Turbulent Airfoil Noise with High-Order Schemes

High-order finite difference schemes are introduced in the flow/acoustics splitting technique for predicting flow generated noise. The flow equations are solved by a second-order finite volume method whereas the acoustic equations are solved by high-order finite difference schemes. At each time step, the incompressible pressure and velocity form input to the acoustic equations.

In this paper, sound generation from a NACA 0012 airfoil in turbulent flow condition is studied. The noise source regions are found at the trailing edge and the strength of the sources is depended on the Reynolds number and the angle of attack.