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Low-Frequency Unsteadiness of Shock Wave Turbulent Boundary Layer Interactions

Clemens, Noel T ; Narayanaswamy, Venkateswaran

Annual review of fluid mechanics, 2014-01, Vol.46 (1), p.469-492 [Periódico revisado por pares]

Palo Alto, CA: Annual Reviews

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Título:
Low-Frequency Unsteadiness of Shock Wave Turbulent Boundary Layer Interactions
Autor: Clemens, Noel T ; Narayanaswamy, Venkateswaran
Assuntos: Boundary layer ; Boundary layer and shear turbulence ; bubble ; Compressible flows; shock and detonation phenomena ; Disturbances ; Exact sciences and technology ; Fluid dynamics ; Fundamental areas of phenomenology (including applications) ; instability ; Mathematical models ; Physics ; reattachment ; Separated flow ; separation ; Shear layers ; Shock waves ; Shock-wave interactions and shock effects ; supersonic ; Turbulent boundary layer ; Turbulent flows, convection, and heat transfer ; Upstream
É parte de: Annual review of fluid mechanics, 2014-01, Vol.46 (1), p.469-492
Notas: SourceType-Books-1
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ObjectType-Book-1
Descrição: Shock wave boundary layer interactions occur in a wide range of supersonic internal and external flows, and often these interactions are associated with turbulent boundary layer separation. The resulting separated flow is associated with large-scale, low-frequency unsteadiness whose cause has been the subject of much attention and debate. In particular, some researchers have concluded that the source of low-frequency motions is in the upstream boundary layer, whereas others have argued for a downstream instability as the driving mechanism. Owing to substantial recent activity, we are close to developing a comprehensive understanding, albeit only in simplified flow configurations. A plausible model is that the interaction responds as a dynamical system that is forced by external disturbances. The low-frequency dynamics seem to be adequately described by a recently proposed shear layer entrainment-recharge mechanism. Upstream boundary layer fluctuations seem to be an important source of disturbances, but the evidence suggests that their impact is reduced with increasing size of the separated flow.
Editor: Palo Alto, CA: Annual Reviews
Idioma: Inglês

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Low-Frequency Unsteadiness of Shock Wave Turbulent Boundary Layer Interactions

Clemens, Noel T ; Narayanaswamy, Venkateswaran

Palo Alto, CA: Annual Reviews

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