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Artikel
Stabilization of the Hypersonic Boundary Layer by Finite-Amplitude Streaks
| Författare: |
Ren, J., Fu, S., Hanifi, A. |
| Dokumenttyp: |
Artikel |
| Tillstånd: |
Publicerad |
| Tidskrift: |
Physics of Fluids |
| Volym: |
28(2)
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| År: |
2016 |
AbstractStabilization of two-dimensional disturbances in hypersonic boundary layer flows by finite-amplitude streaks is investigated using nonlinear parabolized stability equations. The boundary-layer flows at Mach numbers 4.5 and 6.0 are studied in which both the first- and second modes are supported. The streaks considered here are driven either by the so-called optimal perturbations (Klebanoff-type) or the centrifugal instability (Görtler-type). When the streak amplitude is in an appropriate range, i.e., large enough to modulate the laminar boundary layer but low enough to not trigger secondary instability, both the first- and second modes can effectively be suppressed.
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