Author: Sonya Teresa SmithPublisher:
ISBN:
Category :
Languages : en
Pages : 216
Book Description
The Nonlinear Interaction of Görtler Vortices and Tollmien-Schlichting Waves in Compressible Boundary Layers
Author: Sonya Teresa SmithThe Nonlinear Interaction of Tollmien-Schlichting Waves and Taylor-Goertler Vortices in Curved Channel Flows
Author: Tollmien-Schlichting/Vortex Interactions in Compressible Boundary Layer Flows
Author: National Aeronautics and Space Adm NasaPublisher: Independently Published
ISBN: 9781729196014
Category : Science
Languages : en
Pages : 44
Book Description
The weakly nonlinear interaction of oblique Tollmien-Schlichting waves and longitudinal vortices in compressible, high Reynolds number, boundary-layer flow over a flat plate is considered for all ranges of the Mach number. The interaction equations comprise of equations for the vortex which is indirectly forced by the waves via a boundary condition, whereas a vortex term appears in the amplitude equation for the wave pressure. The downstream solution properties of interaction equations are found to depend on the sign of an interaction coefficient. Compressibility is found to have a significant effect on the interaction properties; principally through its impact on the waves and their governing mechanism, the triple-deck structure. It is found that, in general, the flow quantities will grow slowly with increasing downstream co-ordinate; i.e. in general, solutions do not terminate in abrupt, finite-distance 'break-ups'. Blackaby, Nicholas D. Unspecified Center NAS1-19480; RTOP 505-90-52-01
On the Nonlinear Interaction of Gortler Vortices and Tollmien-Schlichting Waves in Curved Channel Flows at Finite Reynolds Numbers
Author: Q. Isa DaudpotaTaylor-Görtler Instabilities of Tollmien-Schlichting Waves and Other Flows Governed by the Interactive Boundary Layer Equations
Author: Philip HallOn Nonlinear Tollmien-Schlichting/Vortex Interaction in Three-Dimensional Boundary Layers
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722451806
Category :
Languages : en
Pages : 30
Book Description
The instability of an incompressible three-dimensional boundary layer (that is, one with cross-flow) is considered theoretically and computationally in the context of vortex/wave interactions. Specifically the work centers on two low amplitude, lower-branch Tollmien-Schlichting waves which mutually interact to induce a weak longitudinal vortex flow; the vortex motion, in turn, gives rise to significant wave-modulation via wall-shear forcing. The characteristic Reynolds number is taken as a large parameter and, as a consequence, the waves' and the vortex motion are governed primarily by triple-deck theory. The nonlinear interaction is captured by a viscous partial-differential system for the vortex coupled with a pair of amplitude equations for each wave pressure. Three distinct possibilities were found to emerge for the nonlinear behavior of the flow solution downstream - an algebraic finite-distance singularity, far downstream saturation or far-downstream wave-decay (leaving pure vortex flow) - depending on the input conditions, the wave angles, and the size of the cross-flow. Davis, Dominic A. R. and Smith, Frank T. Glenn Research Center NCC3-233; RTOP 505-62-21...
Taylor-Goertler Instabilities of Tollmien-Schlichting Waves and Other Flows Governed by the Interactive Boundary Layer Equations
Author: Institute for Computer Applications in Science and EngineeringPublisher:
ISBN:
Category :
Languages : en
Pages : 38
Book Description
Tollmien-Schlichting/vortex Interactions in Compressible Boundary Layer Flows
Author: Nicholas D. BlackabyOn Nonlinear Tollmien-Schlichting/vortex Interaction in Three Dimensional Boundary Layers
Author: Dominic A. R. DavisPublisher:
ISBN:
Category : Eddies
Languages : en
Pages : 32
Book Description
On the Interaction of Stationary Crossflow Vortices and Tollmien-Schlichting Waves in the Boundary Layer on a Rotating Disc
Author: Institute for Computer Applications in Science and EngineeringPublisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description