In this study, we conducted experiments using a shock tube to investigate how the thickness of soft reflecting material affects the reflected shock wave of oblique shock reflection. Results indicated that transition to Mach reflection (MR) is delayed when the reflecting surface is silicone, compared with that when the surface is rigid. Regarding the influence of reflecting material thickness, no remarkable difference was observed between 1mm and 10mm thickness, due to the tradeoff of reflecting wedge angle and material thickness. No significant difference was observed regarding the influence of silicone on wave configuration.
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