Dynamic response of a thin panel subjected to a shock wave impingement and thermal buckling

An ongoing experimental study of high-speed fluid structure interaction by the Structural Sciences Center of the United States Air Force Research Labs is presented. Previous work incorporated novel full field measurement techniques like digital image correlation (DIC) and fast reaction pressure sensitive paint (PSP). To further quantify the complex nature of the experiment full field temperature sensitive paint (TSP) and high-speed shadowgraph were added to the most recent experimental setup. Furthermore, an investigation into the effect of a shockwave's sharp density gradients on DIC results when the images are captured through the high-speed flow was also pursued. Several interesting phenomena are noted such as: 1) fluid-structure interaction measured in the flow with both full field and more traditional measurement techniques, 2) vibration “beating” between the fluctuating flow and the vibrating panel specimen, 3) quantifying the dynamic movement of the shockwave as a function of the wind tunnel’s turbulent boundary layer, and 4) confirming the adverse effects of the shockwave when DIC images are capture through the flow.