Intermittency and swirl dynamics of turbulent swirling flames
Intermittency and swirl dynamics of turbulent swirling flames
Swirl effects on velocity and mixture fraction intermittency have been analysed for turbulent methane flames using LES. Probability density function (pdf) distributions demonstrate a Gaussian shape closer to the centreline region of the flame and a delta function at the far radial position. However, non-Gaussian pdfs are observed for velocity and mixture fraction on the centreline in a region where centre jet precession occurs. Due to the occurrence of recirculation zones, the variation from turbulent to non turbulent flow is more rapid for the velocity than the mixture fraction and therefore indicates how rapidly turbulence affects the molecular transport in these regions of the flame.
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jenkins, K.W
eec6783a-46fd-4386-9346-52bd81875ce2
Kirkpatrick, M.P
fdf5fc3f-893c-4ae2-879f-58ee0e8f20d4
2011
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jenkins, K.W
eec6783a-46fd-4386-9346-52bd81875ce2
Kirkpatrick, M.P
fdf5fc3f-893c-4ae2-879f-58ee0e8f20d4
Ranga Dinesh, K.K.J., Jenkins, K.W and Kirkpatrick, M.P
(2011)
Intermittency and swirl dynamics of turbulent swirling flames.
5th European Combustion Meeting (ECM2011), Cardiff, United Kingdom.
28 Jun - 01 Jul 2011.
6 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Swirl effects on velocity and mixture fraction intermittency have been analysed for turbulent methane flames using LES. Probability density function (pdf) distributions demonstrate a Gaussian shape closer to the centreline region of the flame and a delta function at the far radial position. However, non-Gaussian pdfs are observed for velocity and mixture fraction on the centreline in a region where centre jet precession occurs. Due to the occurrence of recirculation zones, the variation from turbulent to non turbulent flow is more rapid for the velocity than the mixture fraction and therefore indicates how rapidly turbulence affects the molecular transport in these regions of the flame.
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Published date: 2011
Venue - Dates:
5th European Combustion Meeting (ECM2011), Cardiff, United Kingdom, 2011-06-28 - 2011-07-01
Organisations:
Engineering Science Unit
Identifiers
Local EPrints ID: 347902
URI: http://eprints.soton.ac.uk/id/eprint/347902
PURE UUID: af2d8e92-e60b-403a-9eaf-30e49489a73a
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Date deposited: 13 Feb 2013 12:23
Last modified: 15 Mar 2024 03:46
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Contributors
Author:
K.W Jenkins
Author:
M.P Kirkpatrick
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