Instability and Transition of a Mach 5.8 ZPGBL Over a Thermomechanically Compliant Panel

Abstract eng:
Boundary layer instability and transition are fundamental design considerations in hypersonic flight vehicles. Recent results have shown that the fluid-thermal-structural interaction between the structure and grazing boundary layer can affect the turbulence and that transient growth mechanisms appear to be important in amplifying structural motion-induced disturbances. In this paper we use convective and global stability descriptions to identify and characterize the stability properties of a Mach 5.8 flat plate zero pressure gradient boundary layer grazing a thermo-mechanically compliant panel. The new coupled stability modes are verified using direct numerical simulation and their impact on transition is demonstrated.

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