Clément CAILLAUD, Mathieu LUGRIN, Sébastien ESQUIEU

DOI Number: N/A

Conference number: HiSST-2025-224

This study investigates the transition to turbulence for a Cone-Cylinder-Flare (CCF) geometry in the hypersonic regime at Mach 7. Experimental and numerical analyses were conducted in a joint collaboration between CEA and ONERA in order to probe flow dynamics across a wide range of Reynolds numbers. High-frequency wall-pressure and Schlieren measurements were used to identify key instabilities, including first- and second-mode waves, and their non-linear interactions. Resolvent analysis and global stability theory were employed to characterize the dominant mechanisms driving transition. The results highlight the role of Reynolds number and flow topology in determining transition scenarios, providing insights into hypersonic boundary layer instabilities and their implications for aerodynamic design.

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In Categories: 1.Events, 1.HiSST 2025, High-Speed Aerodynamics and Aerothermodynamics with application to hypersonic regimes
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