The aim of this work programme was to develop a capability to understand and predict transonic buffet on wings fitted with buffet control devices. Wind tunnel tests were performed on a half model with buffet control devices fitted to measure dynamic flow characteristics during buffet onset.

Unsteady RANS and DES CFD calculations were carried out, validated against the wind tunnel data. The CFD calculations were then used to develop an improved understanding of transonic wing buffet. An industrialised computational method was developed to enable buffet prediction to be carried out whilst designing wings with buffet control devices fitted.