Vortex dynamics studies in supersonic flow: Merging of co-rotating streamwise vortices

2014 ◽  
Vol 26 (4) ◽  
pp. 046101 ◽  
Author(s):  
L. Maddalena ◽  
F. Vergine ◽  
M. Crisanti
Keyword(s):  
Supersonic Flow ◽  
Vortex Dynamics ◽  
Streamwise Vortices

Structural and mixing characteristics influenced by streamwise vortices in supersonic flow

2017 ◽  
Vol 110 (12) ◽  
pp. 124101 ◽  
Author(s):  
Dongdong Zhang ◽  
Jianguo Tan ◽  
Juwei Hou
Keyword(s):  
Supersonic Flow ◽  
Streamwise Vortices ◽  
Mixing Characteristics

Characteristics of mixing enhanced by streamwise vortices in supersonic flow

2013 ◽  
Vol 103 (14) ◽  
pp. 144102 ◽  
Author(s):  
Qian-cheng Wang ◽  
Zhen-guo Wang ◽  
Jing Lei ◽  
Jun-hong Feng
Keyword(s):  
Supersonic Flow ◽  
Streamwise Vortices

EXPERIMENTAL AND NUMERICAL STUDY ON INDETERMINATE-ORIGIN V-NOTCHED JET

2005 ◽  
Vol 19 (28n29) ◽  
pp. 1607-1610
Author(s):  
T. H. NEW ◽  
J. CAI ◽  
H. M. TSAI
Keyword(s):  
Numerical Simulation ◽  
Cross Sections ◽  
Vortex Dynamics ◽  
Vortex Flow ◽  
Flow Model ◽  
Numerical Study ◽  
Streamwise Vortices ◽  
General Flow ◽  
Flow Features ◽  
Dye Visualization

An experimental and numerical study has been carried out on an indeterminate-origin V-notched jet to understand the pertinent vortex dynamics involved in the resultant flow. Laser cross-sections showed that outward-spreading streamwise vortices are formed at both peak and trough locations. The numerical simulation was also able to reproduce the general flow features observed in the same study by employing numerical dye-visualization. In view of the observations, a vortex flow model is proposed to account for the phenomenon.

Three-dimensional shear layers via vortex dynamics

1988 ◽  
Vol 189 ◽  
pp. 87-116 ◽  
Author(s):  
W. T. Ashurst ◽  
Eckart Meiburg
Keyword(s):  
Vortex Dynamics ◽  
Mixing Layer ◽  
Three Dimensional ◽  
Streamwise Vortices ◽  
Plane Shear ◽  
Discrete Vortex ◽  
Symmetry Properties ◽  
Visualization Experiments ◽  
Layer Development ◽  
Dynamics Method

The evolution of the two- and three-dimensional structures in a temporally growing plane shear layer is numerically simulated with the discrete vortex dynamics method. We include two signs of vorticity and thus account for the effect of the weaker boundary layer leaving the splitter plate which is used to create a spatially developing mixing layer. The interaction between the two layers changes the symmetry properties seen in a single vorticity-layer calculation and results in closer agreement with experimental observations of the interface between the two streams. Our calculations show the formation of concentrated streamwise vortices in the braid region between the spanwise rollers, whereas the spanwise core instability is observed to grow only initially. Comparison with flow visualization experiments is given, and we find that the processes dominating the early stages of the mixing-layer development can be understood in terms of essentially inviscid vortex dynamics.

Sign in / Sign up

Export Citation Format

Share Document