Navier-Stokes solutions for longitudinal flow along circular cylinder, including blunt leading-edge separation

1982 ◽  
Author(s):  
U. GHIA ◽  
A. ABDELHALIM
Keyword(s):  
Circular Cylinder ◽  
Leading Edge ◽  
Navier Stokes ◽  
Longitudinal Flow ◽  
Edge Separation ◽  
Blunt Leading Edge

An Axisymmetric Separated and Reattached Flow on a Longitudinal Blunt Circular Cylinder

1975 ◽  
Vol 42 (2) ◽  
pp. 311-315 ◽  
Author(s):  
T. Ota
Keyword(s):  
Circular Cylinder ◽  
Flow Pattern ◽  
Flow Characteristics ◽  
Leading Edge ◽  
Experimental Results ◽  
Reattachment Length ◽  
Low Speed ◽  
Separated And Reattached Flow ◽  
Blunt Leading Edge

Low-speed experiments are made for an axisymmetric separated, reattached, and redeveloped flow over a longitudinal circular cylinder with blunt leading edge. The flow characteristics such as the reattachment length and the flow pattern in the separated region are measured. The redevelopment of the flow downstream of reattachment is also investigated through various experimental results.

scholarly journals Leading edge separation: a comparison between interaction theory and Navier-Stokes computations

PAMM ◽  
2003 ◽  
Vol 2 (1) ◽  
pp. 312-313
Author(s):  
S Braun ◽  
A Kluwick ◽  
M Trenker
Keyword(s):  
Leading Edge ◽  
Navier Stokes ◽  
Interaction Theory ◽  
Edge Separation

scholarly journals Modeling and Prediction of the Laminar Leading-Edge Separation and Transition in a Blade-Cascade Flow

1996 ◽  
Author(s):  
Dimitri P. Tselepidakis ◽  
Sung-Eun Kim
Keyword(s):  
Boundary Layer ◽  
Separation Bubble ◽  
Plate Boundary ◽  
Leading Edge ◽  
Suction Side ◽  
Navier Stokes ◽  
Compressor Cascade ◽  
Real Flow ◽  
Side Flow ◽  
Edge Separation

This paper presents the computation of the flow around a controlled diffusion compressor cascade. Features associated with by-pass transition close to the leading edge — including laminar leading-edge separation — contribute significantly to the evolution of the boundary layer on the blade surface. Previous studies have demonstrated that conventional k-ε models, based on linear or non-linear Boussinesq stress-strain relations, are able to capture by-pass transition in simple shear, but are unable to resolve transitional features in complex strain, like the leading-edge separation bubble, which is of considerable influence to the suction-side flow at high inlet angle. Here, the k-ω turbulence model has been implemented in a nonstaggered, finite-volume based segregated Reynolds-Averaged Navier-Stokes solver. We demonstrate that this model, if properly sensitized to the generation of turbulence by irrotational strains, is capable of capturing the laminar leading-edge separation bubble. The real flow around the leading edge is laminar and the transition is only provoked on the reattachment region. Additional investigation of transition in a flat-plate boundary layer development has also produced reasonably promising results.

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