Numerical modelling of flow pattern for high swirling flows
(2015) 9th International Conference on Experimental Fluid Mechanics 92. p.02059-02059- Abstract
- This work focuses on the interaction of two coaxial swirling jets. High swirl burners are suitable for lean flames and produce low emissions. Computational Fluid Dynamics has been used to study the isothermal behaviour of two confined jets whose setup and operating conditions are those of the benchmark of Roback and Johnson. Numerical model is a Total Variation Diminishing and PISO is used to pressure velocity coupling. Transient analysis let identify the non-axisymmetric region of reverse flow. The center of instantaneous azimuthal velocities is not located in the axis of the chamber. The temporal sampling evidences this center spins around the axis of the device forming the precessing vortex core (PVC) whose Strouhal numbers are more... (More)
- This work focuses on the interaction of two coaxial swirling jets. High swirl burners are suitable for lean flames and produce low emissions. Computational Fluid Dynamics has been used to study the isothermal behaviour of two confined jets whose setup and operating conditions are those of the benchmark of Roback and Johnson. Numerical model is a Total Variation Diminishing and PISO is used to pressure velocity coupling. Transient analysis let identify the non-axisymmetric region of reverse flow. The center of instantaneous azimuthal velocities is not located in the axis of the chamber. The temporal sampling evidences this center spins around the axis of the device forming the precessing vortex core (PVC) whose Strouhal numbers are more than two for Swirl numbers of one. Influence of swirl number evidences strong swirl numbers are precursor of large vortex breakdown. Influence of conical diffusers evidence the reduction of secondary flows associated to boundary layer separation. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7779565
- author
- Parra, Teresa ; Perez, J. R. ; Szász, Robert-Zoltán LU ; Rodriguez, M. A. and Castro, F.
- organization
- publishing date
- 2015
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Efm14 - Experimental Fluid Mechanics 2014
- volume
- 92
- pages
- 02059 - 02059
- publisher
- EDP Sciences
- conference name
- 9th International Conference on Experimental Fluid Mechanics
- conference dates
- 2014-11-18 - 2014-11-21
- external identifiers
-
- wos:000358249900061
- scopus:84937468682
- ISSN
- 2101-6275
- 2100-014X
- DOI
- 10.1051/epjconf/20159202059
- language
- English
- LU publication?
- yes
- id
- 13b5aa19-6c70-4cd9-9626-2daf7786921a (old id 7779565)
- date added to LUP
- 2016-04-01 09:57:16
- date last changed
- 2025-01-13 02:21:09
@inproceedings{13b5aa19-6c70-4cd9-9626-2daf7786921a,
abstract = {{This work focuses on the interaction of two coaxial swirling jets. High swirl burners are suitable for lean flames and produce low emissions. Computational Fluid Dynamics has been used to study the isothermal behaviour of two confined jets whose setup and operating conditions are those of the benchmark of Roback and Johnson. Numerical model is a Total Variation Diminishing and PISO is used to pressure velocity coupling. Transient analysis let identify the non-axisymmetric region of reverse flow. The center of instantaneous azimuthal velocities is not located in the axis of the chamber. The temporal sampling evidences this center spins around the axis of the device forming the precessing vortex core (PVC) whose Strouhal numbers are more than two for Swirl numbers of one. Influence of swirl number evidences strong swirl numbers are precursor of large vortex breakdown. Influence of conical diffusers evidence the reduction of secondary flows associated to boundary layer separation.}},
author = {{Parra, Teresa and Perez, J. R. and Szász, Robert-Zoltán and Rodriguez, M. A. and Castro, F.}},
booktitle = {{Efm14 - Experimental Fluid Mechanics 2014}},
issn = {{2101-6275}},
language = {{eng}},
pages = {{02059--02059}},
publisher = {{EDP Sciences}},
title = {{Numerical modelling of flow pattern for high swirling flows}},
url = {{http://dx.doi.org/10.1051/epjconf/20159202059}},
doi = {{10.1051/epjconf/20159202059}},
volume = {{92}},
year = {{2015}},
}