Aerofoil self-noise is often the dominant noise source emitted from lifting surfaces, such as wings and turbine blades, and is a major issue in a number of strategically important sectors in the UK, including environment protection, energy and transport. Related work is in its early stages and the precise control mechanisms are still poorly understood. This 36-month project is concerned with establishing the fundamental physical control mechanisms of surface modifications with the objective of developing effective adjustments to aerofoil geometries at realistic Reynolds numbers and angle of attack that reduce noise without significantly degrading aerodynamic performance.

The project is a combination of state-of-the-art detailed experimentation with the application of latest advances in high-resolution computational methods, design optimisation and high-performance computing. At the heart of this project is the use of a new turbulent off-wall boundary condition to allow accurate modelling of the interaction between the boundary layer and canopy surfaces and the high-resolution unsteady flow simulation methods accelerated on Graphics Processing Units.