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Numerical investigation in chaos characteristics of macro-mixing efficiency of two-dimensional supersonic mixing layer

Yu, Jiangfei LU ; Liu, Wei-Dong; Sun, Ming-Bo; Tan, Jian-Guo and Zhang, Wei-Hua (2015) In Proceedings of the Institution of Mechanical Engineers. Part G: Journal of Aerospace Engineering 229(7). p.1226-1235
Abstract
Coherent structures of two-dimensional supersonic turbulent mixing layers with the engineering background have been investigated numerically with large eddy simulation method. The chaos characteristics of transverse sections of mixing layer flowfield have been obtained through the analyses of two chaos characteristic parameters, Lyapunov exponent and correlation dimension. The results show that under the conditions of the present numerical simulations and physical models, the distribution of correlation dimension is roughly consistent with that of streamwise turbulent intensity at transverse sections of mixing layers through analysis of nonlinear time series, as may be used to measure the macro-mixing efficiency of mixing layers... (More)
Coherent structures of two-dimensional supersonic turbulent mixing layers with the engineering background have been investigated numerically with large eddy simulation method. The chaos characteristics of transverse sections of mixing layer flowfield have been obtained through the analyses of two chaos characteristic parameters, Lyapunov exponent and correlation dimension. The results show that under the conditions of the present numerical simulations and physical models, the distribution of correlation dimension is roughly consistent with that of streamwise turbulent intensity at transverse sections of mixing layers through analysis of nonlinear time series, as may be used to measure the macro-mixing efficiency of mixing layers quantitatively. The distribution of maximal Lyapunov exponent could be used to validate the quantitative results. Therefore, a potential experimental method measuring the thickness of mixing layers with low costs on the basis of chaos characteristic parameters has been proposed firstly. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Supersonic mixing layer, large eddy simulation, nonlinear time-series, analysis, chaos
in
Proceedings of the Institution of Mechanical Engineers. Part G: Journal of Aerospace Engineering
volume
229
issue
7
pages
1226 - 1235
publisher
SAGE Publications Inc.
external identifiers
  • wos:000354408000005
  • scopus:84930408799
ISSN
0954-4100
DOI
10.1177/0954410014548461
language
English
LU publication?
yes
id
390d0ca3-3853-42b0-a80e-e8b0ea2dc793 (old id 7422820)
date added to LUP
2015-06-26 09:31:12
date last changed
2017-01-01 05:27:55
@article{390d0ca3-3853-42b0-a80e-e8b0ea2dc793,
  abstract     = {Coherent structures of two-dimensional supersonic turbulent mixing layers with the engineering background have been investigated numerically with large eddy simulation method. The chaos characteristics of transverse sections of mixing layer flowfield have been obtained through the analyses of two chaos characteristic parameters, Lyapunov exponent and correlation dimension. The results show that under the conditions of the present numerical simulations and physical models, the distribution of correlation dimension is roughly consistent with that of streamwise turbulent intensity at transverse sections of mixing layers through analysis of nonlinear time series, as may be used to measure the macro-mixing efficiency of mixing layers quantitatively. The distribution of maximal Lyapunov exponent could be used to validate the quantitative results. Therefore, a potential experimental method measuring the thickness of mixing layers with low costs on the basis of chaos characteristic parameters has been proposed firstly.},
  author       = {Yu, Jiangfei and Liu, Wei-Dong and Sun, Ming-Bo and Tan, Jian-Guo and Zhang, Wei-Hua},
  issn         = {0954-4100},
  keyword      = {Supersonic mixing layer,large eddy simulation,nonlinear time-series,analysis,chaos},
  language     = {eng},
  number       = {7},
  pages        = {1226--1235},
  publisher    = {SAGE Publications Inc.},
  series       = {Proceedings of the Institution of Mechanical Engineers. Part G: Journal of Aerospace Engineering},
  title        = {Numerical investigation in chaos characteristics of macro-mixing efficiency of two-dimensional supersonic mixing layer},
  url          = {http://dx.doi.org/10.1177/0954410014548461},
  volume       = {229},
  year         = {2015},
}