Large eddy simulations of turbulent non-premixed swirling flames
Large eddy simulations of turbulent non-premixed swirling flames
In this study Large Eddy Simulation (LES) technique has been applied to predict a selected swirling flame based on the Sydney swirl burner. The predicted flame is known as SMH1 having a swirl number of 0.32 and fuel of CH4:H2 (50:50) by volume. In the numerical methods, the governing equations for mass, momentum and mixture fraction are solved on a structured Cartesian grid with 1 million cells. Smagorinsky eddy viscosity model with localized dynamic procedure is used as the sub-grid scale turbulence model. The conserved scalar mixture fraction based thermo-chemical variables are described using a steady laminar flamelet model. With appropriate inflow, outflow boundary conditions and relatively fine grid resolutions, LES predicts the upstream recirculation zone and key flow features. The predictions show good agreement with experimental measurements for the velocity field. Some discrepancies in mixture fraction predictions were observed overall the predicted mean temperature and species concentrations are also reasonably good and agree with experimental measurements.
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Malalasekera, W
f4f0cbe7-e395-41f8-acd5-d5c93e31928e
Ibrahim, S.S
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Kirkpatrick, M.P
fdf5fc3f-893c-4ae2-879f-58ee0e8f20d4
September 2006
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Malalasekera, W
f4f0cbe7-e395-41f8-acd5-d5c93e31928e
Ibrahim, S.S
ea463b62-a55d-41de-b17b-ec1288c81ab4
Kirkpatrick, M.P
fdf5fc3f-893c-4ae2-879f-58ee0e8f20d4
Ranga Dinesh, K.K.J., Malalasekera, W, Ibrahim, S.S and Kirkpatrick, M.P
(2006)
Large eddy simulations of turbulent non-premixed swirling flames.
Turbulence, Heat and Mass Transfer (THMT05), Dubrovnik, Croatia.
25 - 29 Sep 2006.
13 pp
.
(doi:10.1615/ICHMT.2006.TurbulHeatMassTransf.1260).
Record type:
Conference or Workshop Item
(Paper)
Abstract
In this study Large Eddy Simulation (LES) technique has been applied to predict a selected swirling flame based on the Sydney swirl burner. The predicted flame is known as SMH1 having a swirl number of 0.32 and fuel of CH4:H2 (50:50) by volume. In the numerical methods, the governing equations for mass, momentum and mixture fraction are solved on a structured Cartesian grid with 1 million cells. Smagorinsky eddy viscosity model with localized dynamic procedure is used as the sub-grid scale turbulence model. The conserved scalar mixture fraction based thermo-chemical variables are described using a steady laminar flamelet model. With appropriate inflow, outflow boundary conditions and relatively fine grid resolutions, LES predicts the upstream recirculation zone and key flow features. The predictions show good agreement with experimental measurements for the velocity field. Some discrepancies in mixture fraction predictions were observed overall the predicted mean temperature and species concentrations are also reasonably good and agree with experimental measurements.
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Published date: September 2006
Venue - Dates:
Turbulence, Heat and Mass Transfer (THMT05), Dubrovnik, Croatia, 2006-09-25 - 2006-09-29
Organisations:
Engineering Science Unit
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Local EPrints ID: 347916
URI: http://eprints.soton.ac.uk/id/eprint/347916
PURE UUID: 235d02ce-6b6d-4486-913e-5019dbb0acaa
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Date deposited: 12 Feb 2013 14:28
Last modified: 15 Mar 2024 03:46
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Author:
W Malalasekera
Author:
S.S Ibrahim
Author:
M.P Kirkpatrick
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