Large eddy simulation of turbulent unconfined swirling flows
Large eddy simulation of turbulent unconfined swirling flows
Swirl stabilized flames are common in many engineering applications and modeling of such flames is particularly difficult due to their recirculation and vortex characteristics. Most classical approaches such as Reynolds average Navier-Stokes (RANS) models which work very well in other situations fail to perform well in high swirl recirculation flows. In this study a recently developed large eddy simulation (LES) code has been applied to the prediction of non reacting swirling flows experimentally tested by Al-Abdeli and Masri. For the sub-grid scale closure, the localized dynamic Smagorinsky eddy viscosity model is used. Predicted results are compared with experimentally measured mean velocities, rms fluctuations and Reynolds shear stresses. The agreement between predictions and experiments are very good at most axial and radial locations, although some discrepancies exist at certain locations downstream from the burner exit plane. It is observed that great care has to be taken over the boundary conditions specification for the LES simulation of high swirl intensity recirculation flows.
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
September 2005
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
(2005)
Large eddy simulation of turbulent unconfined swirling flows.
4th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2005), Cairo, Egypt.
19 - 22 Sep 2005.
6 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Swirl stabilized flames are common in many engineering applications and modeling of such flames is particularly difficult due to their recirculation and vortex characteristics. Most classical approaches such as Reynolds average Navier-Stokes (RANS) models which work very well in other situations fail to perform well in high swirl recirculation flows. In this study a recently developed large eddy simulation (LES) code has been applied to the prediction of non reacting swirling flows experimentally tested by Al-Abdeli and Masri. For the sub-grid scale closure, the localized dynamic Smagorinsky eddy viscosity model is used. Predicted results are compared with experimentally measured mean velocities, rms fluctuations and Reynolds shear stresses. The agreement between predictions and experiments are very good at most axial and radial locations, although some discrepancies exist at certain locations downstream from the burner exit plane. It is observed that great care has to be taken over the boundary conditions specification for the LES simulation of high swirl intensity recirculation flows.
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Published date: September 2005
Venue - Dates:
4th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2005), Cairo, Egypt, 2005-09-19 - 2005-09-22
Organisations:
Engineering Science Unit
Identifiers
Local EPrints ID: 347918
URI: http://eprints.soton.ac.uk/id/eprint/347918
PURE UUID: cc6aaff8-d7d8-42c8-bdac-0cd8fecaedb1
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Date deposited: 12 Feb 2013 14:45
Last modified: 15 Mar 2024 03:46
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Contributors
Author:
W Malalasekera
Author:
S.S Ibrahim
Author:
M.P Kirkpatrick
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