Results 311 to 320 of about 458,946 (359)

Boundary layers and separation

1966
We consider two-dimensional stationary viscous incompressible flow past a finite object. It is assumed that for each value of the Reynolds number a solution exists; it is also assumed that if this solution is not unique it is possible in principle to select a solution which varies continuously with Reynolds number.
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Transition in a Separated Laminar Boundary Layer

Journal of the Aerospace Sciences, 1960
PROGRESS in understanding the mechanism of transition from laminar to turbulent flow in a boundary layer has been largely confined to flow along a flat plate. The present investigation is concerned with transition in a separated laminar boundary layer. A hot wire investigation of flow near the short leading-edge bubble on a RAE-103 airfoil section led ...
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Instability of separated boundary layers

2012
In this chapter we discuss flow instability at laminar boundary-layer separation that can happen on airfoils and wings, in diffusors, at sudden surface variations such as steps and bumps, etc. Within this topic, a good deal of research data is available for local separation regions generated when the separated layer reattaches back to the surface. Such
Andrey V. Boiko, Alexander V. Dovgal, Genrih R. Grek, Victor V. Kozlov   +3 more
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On laminar boundary-layer separation

12th Aerospace Sciences Meeting, 1974
Iterative finite-difference techniques are developed for integrating the boundary-layer equations, without approximation, through a region of reversed flow. The numerical procedures are used to calculate incompressible laminar separated flows and to investigate the conditions for regular behavior at the point of separation.
J. KLINEBERG, J. STEGER
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Turbulent Boundary-Layer Separation

Annual Review of Fluid Mechanics, 1989
This article summarizes our present understanding of the physical behavior of two-dimensional turbulent separated flows, which occur due to adverse pressure gradients around streamlined and bluff bodies. The physical behavior of turbulence is flow dependent, so detailed experimental infor­ mation is needed for understanding such flows and modeling ...
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Vorticity and Boundary Layer Separation

2021
Vorticity represents the underlying skeleton of fluid motion. The spatial distribution of vorticity characterizes the dynamic properties of fluid flow. When vorticity has a regular distribution, like when it is confined in the boundary layer next to the wall, the flow is regular and predictable.
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Study of Separating Compressible Turbulent Boundary-Layers

14th AIAA/AHI Space Planes and Hypersonic Systems and Technologies Conference, 2006
The prediction of incipient separation due to shock wave interaction with a boundary layer is a critical prerequisite in the design of air-breathing engine inlets and combustors. These shock wave/boundary layer interactions occur in both two-dimensional and three-dimensional forms.
Dann, A. G., Denman, A. W., Jacobs, P A, Morgan, R G   +3 more
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New Method for Supersonic Boundary-Layer Separations

AIAA Journal, 1974
An efficient numerical solution algorithm is presented for solving the interacting supersonic laminar boundarylayer problem. The method employs a time dependent approach with the alternating direction implicit (ADI) scheme and directly accounts for the necessary downstream boundary condition. Solutions are presented for MOO = 3 cold wall boundary-layer
Werle, M. J., Vatsa, V. N.
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Oscillating Laminar Boundary Layers and Unsteady Separation

AIAA Journal, 1974
Abstract : The unsteady laminar boundary equations are solved numerically for oscillating outer flow velocity distributions. Some characteristic features of oscillating boundary-layers are observed and checked against existing analytical and experimental data.
Tsahalis, D. Th., Telionis, D. P.
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Experimental study of an unsteady separating boundary layer

AIAA Journal, 1998
The objective of this research is to map the e owe eld around the trailing edge of a hydrofoil subject to transverse gust loading, to provide guidance for the formulation of an appropriate Kutta condition for inviscid solution methods. The hydrofoil is equipped with a trailing edge that incurs boundary-layer separation over the last few percent of the ...
E. A. Lurie, D. P. Keenan, J. E. Kerwin
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