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Large-eddy simulation of underexpanded natural gas jets

Vuorinen, V. ; Duwig, C. LU ; Kaario, O. ; Larmi, M. and Boersma, B. J. (2020) 14th European Turbulence Conference, ETC 2013
Abstract

Large-Eddy Simulations (LES) based on scale-selective implicit filtering are carried out in order to study the effect of nozzle pressure ratios on the characteristics of highly underexpanded jets. Pressure ratios ranging from 3 to 9 with Reynolds numbers of the order 70000 to 150000 are considered. The studied configuration agrees well with the classical picture of the structure of highly underexpanded jets. The coherent structures of the jet are investigated using Proper Orthogonal Decomposition (POD). The statistics of scalar dissipation rate are investigated in detail. Using the first POD modes, we reconstruct the scalar fields and provide the link between the dominant modes and the dissipative structures.

Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to conference
publication status
published
subject
conference name
14th European Turbulence Conference, ETC 2013
conference location
Lyon, France
conference dates
2013-09-01 - 2013-09-04
external identifiers
  • scopus:85085774474
language
English
LU publication?
yes
id
e01d2621-a7f3-4683-982c-6068159797f4
alternative location
http://etc14.ens-lyon.fr/etc-14-proceedings/accepted-talks/
date added to LUP
2020-03-25 15:47:04
date last changed
2022-04-18 21:29:32
@misc{e01d2621-a7f3-4683-982c-6068159797f4,
  abstract     = {{<p>Large-Eddy Simulations (LES) based on scale-selective implicit filtering are carried out in order to study the effect of nozzle pressure ratios on the characteristics of highly underexpanded jets. Pressure ratios ranging from 3 to 9 with Reynolds numbers of the order 70000 to 150000 are considered. The studied configuration agrees well with the classical picture of the structure of highly underexpanded jets. The coherent structures of the jet are investigated using Proper Orthogonal Decomposition (POD). The statistics of scalar dissipation rate are investigated in detail. Using the first POD modes, we reconstruct the scalar fields and provide the link between the dominant modes and the dissipative structures.</p>}},
  author       = {{Vuorinen, V. and Duwig, C. and Kaario, O. and Larmi, M. and Boersma, B. J.}},
  language     = {{eng}},
  title        = {{Large-eddy simulation of underexpanded natural gas jets}},
  url          = {{http://etc14.ens-lyon.fr/etc-14-proceedings/accepted-talks/}},
  year         = {{2020}},
}