Oscillatory momentum transport in cascade transitional boundary layer flows

dc.contributor.authorRojas-Solorzano, L.
dc.date.accessioned2015-12-02T05:57:07Z
dc.date.available2015-12-02T05:57:07Z
dc.date.issued1998
dc.description.abstractThe generation and early evolution of boundary layer transitional instabilities, named Tollmien-Schlichting (T-S) waves, in airfoil cascade flows are studied. The energy exchange between the mean flow and the flow instabilities is computed by performing Direct Numerical Simulation of the fluid flow governing equations and by calculating the fluctuating kinetic energy (FKE) budget within the separated boundary layer. The driving role of the FKE production in the wavelength modulation process associated to the receptivity phenomenon, i.e., the generation of T-S waves, is demonstrated. The FKE production largely hastens the wavelength modulation around the inflection point of the mean velocity profile across the boundary layer. Above the inflection point, the fluctuating pressure field favors the energy transport and provides the energy necessary to convect the instabilities out of the boundary layer. The evolution of the T-S waves depicts an asymmetric distribution of the production term in the transverse direction, i.e., in the lower half of the boundary layer the mean flow provides energy to the instabilities while the opposite occurs in the upper halfru_RU
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/831
dc.language.isoenru_RU
dc.publisherDOI: 10.2514/6.1998-2560 Conference: 29th AIAA Fluid Dynamics Conference, At Albuquerque, NM, USA, Volume: 1ru_RU
dc.subjectResearch Subject Categories::TECHNOLOGY::Engineering mechanicsru_RU
dc.subjectmechanical engineeringru_RU
dc.subjectTollmien-Schlichting wavesru_RU
dc.titleOscillatory momentum transport in cascade transitional boundary layer flowsru_RU
dc.typeArticleru_RU

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