This study uses direct numerical simulation and stability analysis methods to investigate the impact of wall cavity defects on the instability of boundary layers at and . For flow at , synchronization points with equal phase velocities in both fast and slow modes play a crucial role in controlling disturbance wave growth. When the inlet disturbance wave frequency () approaches the synchronization point frequency, the impact of cavity size on the growth of the disturbance wave can be divided into three regions in the (, ) plane, namely, region A, region B, and region C. Region A refers to small cavities with , which have the weakest suppression effect. Region B includes large cavities with and and exhibits the best suppression effect. Finally, region C covers cavities with and and shows a non-monotonic control effect on the growth of disturbance wave as the cavity depth varies. For flow at , cavities of different sizes always enhance the growth of disturbance waves. The widest and shallowest cavities (, ) exhibit the most significant enhancement.
Stability Analysis for High-Speed Boundary-Layer Flow with Cavities
AIAA Journal ; 62 , 5 ; 1744-1754
2024-01-26
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Stability Analysis of High-Speed Boundary-Layer Flow with Gas Injection
British Library Conference Proceedings | 2014
|TURBULENT BOUNDARY LAYER FLOW OVER CIRCULAR CAVITIES
British Library Conference Proceedings | 2006
|Stability Analysis of Roughness Array Wake in a High-Speed Boundary Layer
British Library Conference Proceedings | 2009
|