Passive control of 3D adaptive shock control bumps using a sealed cavity

This paper presents a Fluid–Structure-Interaction study of novel passive adaptive shock control bump concept. A flexible plate, clamped on all sides and placed above sealed cavity, was tested beneath Mach 1.4 normal in the Imperial College London supersonic wind tunnel. The plate actuated into shape 3D by passively controlling cavity pressure through an array breather holes. Preliminary experiments were performed with active (via vacuum tank) at 2 to illustrate potential this Full-field surface measurement techniques, namely photogrammetry sensitive paint, employed addition static tappings schlieren photography. Results confirmed that plays key role determining aerostructural behaviour plate. In addition, it found carefully holes allowed deform when region remain flat otherwise. shows significant for improving off-design bumps.