This flow-acoustic simulation by Dr Zhong-Nan Wang, Research Associate in Computational Fluid Dynamics, shows the noise generated from a turbulent jet interacting with a surface. The coloured isosurfaces show the turbulent structures and the background grey-scale contour shows the acoustic waves.
Dr Wang said: "This is a flow-acoustic model for a modern aeroengine installed under a wing, revealing the installation noise generation mechanisms. In addition to the noise generated by the jet itself, a new sound source is produced by the jet-surface interactions with strong acoustic waves emitted at the surface trailing edge. The challenge is to reduce the level of this noise source."