scholarly journals Global instability analysis and control of three-dimensional long open cavity flow

2016 ◽  
Author(s):  
Qiong Liu
Keyword(s):  
Three Dimensional ◽  
Cavity Flow ◽  
Open Cavity ◽  
Global Instability ◽  
Instability Analysis ◽  
And Control

scholarly journals On linear instability mechanisms in incompressible open cavity flow

2014 ◽  
Vol 752 ◽  
pp. 219-236 ◽  
Author(s):  
F. Meseguer-Garrido ◽  
J. de Vicente ◽  
E. Valero ◽  
V. Theofilis
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Thickness ◽  
Theoretical Study ◽  
Three Dimensional ◽  
Theoretical Data ◽  
Cavity Flow ◽  
Linear Instability ◽  
Open Cavity ◽  
Global Instability ◽  
Neutral Curves

AbstractA theoretical study of linear global instability of incompressible flow over a rectangular spanwise-periodic open cavity in an unconfined domain is presented. Comparisons with the limited number of results available in the literature are shown. Subsequently, the parameter space is scanned in a systematic manner, varying Reynolds number, incoming boundary-layer thickness and length-to-depth aspect ratio. This permits documenting the neutral curves and leading eigenmode characteristics of this flow. Correlations constructed using the results obtained collapse all available theoretical data on the three-dimensional instabilities.

Space-time aspects of a three-dimensional multi-modulated open cavity flow

2013 ◽  
Vol 25 (6) ◽  
pp. 064105 ◽  
Author(s):  
J. Basley ◽  
L. R. Pastur ◽  
N. Delprat ◽  
F. Lusseyran
Keyword(s):  
Three Dimensional ◽  
Cavity Flow ◽  
Space Time ◽  
Open Cavity

Analysis of Flow Oscillation Due to Sidewall of Three-Dimensional Supersonic Open Cavity Flow

2019 ◽  
Vol 20 (4) ◽  
pp. 839-849
Author(s):  
T. U. Kim ◽  
S. H. Park ◽  
S. Lee ◽  
D. O. Yu ◽  
H. C. You
Keyword(s):  
Three Dimensional ◽  
Cavity Flow ◽  
Open Cavity ◽  
Flow Oscillation

scholarly journals Successive bifurcations in a fully three-dimensional open cavity flow

2018 ◽  
Vol 844 ◽  
pp. 855-877 ◽  
Author(s):  
F. Picella ◽  
J.-Ch. Loiseau ◽  
F. Lusseyran ◽  
J.-Ch. Robinet ◽  
S. Cherubini ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Linear Stability ◽  
Three Dimensional ◽  
Cavity Flow ◽  
Secondary Instability ◽  
Open Cavity ◽  
Transition To Turbulence ◽  
Clear Understanding ◽  
Joint Application ◽  
Centrifugal Instability

The transition to unsteadiness of a three-dimensional open cavity flow is investigated using the joint application of direct numerical simulations and fully three-dimensional linear stability analyses, providing a clear understanding of the first two bifurcations occurring in the flow. The first bifurcation is characterized by the emergence of Taylor–Görtler-like vortices resulting from a centrifugal instability of the primary vortex core. Further increasing the Reynolds number eventually triggers self-sustained periodic oscillations of the flow in the vicinity of the spanwise end walls of the cavity. This secondary instability causes the emergence of a new set of Taylor–Görtler vortices experiencing a spanwise drift directed toward the spanwise end walls of the cavity. While a two-dimensional stability analysis would fail to capture this secondary instability due to the neglect of the lateral walls, it is the first time to our knowledge that this drifting of the vortices can be entirely characterized by a three-dimensional linear stability analysis of the flow. Good agreements with experimental observations and measurements strongly support our claim that the initial stages of the transition to turbulence of three-dimensional open cavity flows are solely governed by modal instabilities.

Sign in / Sign up

Export Citation Format

Share Document