Hot-wall shock-wave boundary layer interaction of a compliant cantilever in hypersonic flow

Two-dimensional coupled fluid-structure simulations have been performed using a commercial fluid simulation package to compare the response of a cantilever panel subject to laminar shock-impingement (UNSW’s HyMAX) with baseline and elevated wall-temperatures at experimentally comparable flow conditions. This comparison serves as a preliminary study on the value of extending the existing HyMAX case to a heated condition. The thermal state was applied using an isothermal wall with altered elastic modulus and density in the structure. During the simulation, the tip x- and y-deflections, and x- and y-forces were tracked to produce timeseries. These timeseries were then processed using perturbation extraction, and autoregressive power spectral density estimation. Additionally, surface pressure coefficient distributions were extracted. From these results it is shown that the hot case experienced over double the y-force and y-deflection at a lower frequency within the same time-frame. At equivalent deflected states, the hot case experienced 8.4% more y-force when deflected down, and 3.5% less y-force when deflected up. This incremental force variance, coupled with a 28% reduction in elastic modulus and 2.5% reduction in density, leads to the aforementioned significant increase in deflection.