An analysis of vortex breakdown predicted by a time-accurate Euler code

1999 ◽  
pp. 331-338
Author(s):  
J. Müller ◽  
D. Hummel
Keyword(s):  
Vortex Breakdown

Surface shaping to suppress vortex breakdown on delta wings

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 186-187
Author(s):  
S. Srigrarom ◽  
M. Kurosaka
Keyword(s):  
Vortex Breakdown ◽  
Delta Wings ◽  
Surface Shaping

Vortex breakdown over unsteady delta wings and its control

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 571-574
Author(s):  
H. Yang ◽  
I. Gursul
Keyword(s):  
Vortex Breakdown ◽  
Delta Wings

Diamond, cropped, delta, and double-delta wing vortex breakdown during dynamic pitching

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 567-569
Author(s):  
Roy Y. Myose ◽  
Boon-Kiat Lee ◽  
Shigeo Hayashibara ◽  
L. S. Miller
Keyword(s):  
Vortex Breakdown ◽  
Delta Wing ◽  
Double Delta Wing

Turbulent vortex breakdown at high Reynolds numbers

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 825-834
Author(s):  
F. Novak ◽  
T. Sarpkaya
Keyword(s):  
Vortex Breakdown ◽  
Reynolds Numbers ◽  
Turbulent Vortex ◽  
High Reynolds Numbers ◽  
High Reynolds

Vortex Dynamics and Vortex Breakdown

1988 ◽  
Author(s):  
Melvyn S. Berger
Keyword(s):  
Vortex Dynamics ◽  
Vortex Breakdown

scholarly journals Vortex breakdown of the swirling flow in a Lean Direct Injection burner

2020 ◽  
Vol 32 (12) ◽  
pp. 125118
Author(s):  
Yazhou Shen ◽  
Mohamad Ghulam ◽  
Kai Zhang ◽  
Ephraim Gutmark ◽  
Christophe Duwig
Keyword(s):  
Vortex Breakdown ◽  
Swirling Flow ◽  
Direct Injection ◽  
Lean Direct Injection ◽  
Injection Burner

scholarly journals Axial Flow Compressor Stability Enhancement: Circumferential T-Shape Grooves Performance Investigation

Aerospace ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 12
Author(s):  
Marco Porro ◽  
Richard Jefferson-Loveday ◽  
Ernesto Benini
Keyword(s):  
Vortex Breakdown ◽  
Pressure Ratio ◽  
Axial Flow ◽  
Suction Side ◽  
Treatment Technique ◽  
Tip Leakage Flow ◽  
Stall Inception ◽  
Stall Margin ◽  
Casing Treatment ◽  
Stall Margin Improvement

This work focuses its attention on possibilities to enhance the stability of an axial compressor using a casing treatment technique. Circumferential grooves machined into the case are considered and their performances evaluated using three-dimensional steady state computational simulations. The effects of rectangular and new T-shape grooves on NASA Rotor 37 performances are investigated, resolving in detail the flow field near the blade tip in order to understand the stall inception delay mechanism produced by the casing treatment. First, a validation of the computational model was carried out analysing a smooth wall case without grooves. The comparisons of the total pressure ratio, total temperature ratio and adiabatic efficiency profiles with experimental data highlighted the accuracy and validity of the model. Then, the results for a rectangular groove chosen as the baseline case demonstrated that the groove interacts with the tip leakage flow, weakening the vortex breakdown and reducing the separation at the blade suction side. These effects delay stall inception, improving compressor stability. New T-shape grooves were designed keeping the volume as a constant parameter and their performances were evaluated in terms of stall margin improvement and efficiency variation. All the configurations showed a common efficiency loss near the peak condition and some of them revealed a stall margin improvement with respect to the baseline. Due to their reduced depth, these new configurations are interesting because they enable the use of a thinner light-weight compressor case as is desirable in aerospace applications.

scholarly journals Vortex breakdown in a two-fluid confined flow generated in a cylindrical container

2020 ◽  
Vol 1677 ◽  
pp. 012076
Author(s):  
B. R. Sharifullin ◽  
I. V. Naumov ◽  
M. A. Tsoy ◽  
V. N. Shtern
Keyword(s):  
Vortex Breakdown ◽  
Cylindrical Container ◽  
Confined Flow ◽  
Two Fluid

Vortex Breakdown Types and Global Modes in Swirling Combustor Flows with Axial Injection

2015 ◽  
Vol 31 (1) ◽  
pp. 219-229 ◽  
Author(s):  
Steffen Terhaar ◽  
Thoralf G. Reichel ◽  
Christina Schrödinger ◽  
Lothar Rukes ◽  
Christian Oliver Paschereit ◽  
...  
Keyword(s):  
Vortex Breakdown ◽  
Axial Injection ◽  
Global Modes
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