An investigation into the potential use of soft compliant materials towards unsteady shock load mitigation is made. Compression ramps with different angles are used to generate shock waves impinging on the surface of the compliant layer embedded on a rigid flat plate in a Mach 2.5 flow. A urethane rubber material is chosen as the candidate compliant material for its well characterized material properties and ease of fabrication. Shock boundary layer interactions and fluid structure interactions are analyzed through oil-pigment surface streakline visualization and high-speed pressure transducer measurements. Reductions in the mean separation size are observed with embedding the compliant layer compared to without. Furthermore, significant reduction in the energy content of the low frequency shock oscillations over the intermittent region was also observed by embedding a compliant layer on the rigid plate.
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