The Zimont TFC Model Applied to premixed Bluff Body Stabilized Combustion Using Four Different RANS Turbulence Models
(2007) ASME Turbo Expo 2007 2. p.353-361- Abstract
- The Volvo Aero Corp. (VAC) Triangular Bluff Body
Stabilized Combustion rig VR-1 has been extensively
researched both in terms of experiments and theoretical
treatment. Previous CFD work has concentrated on Reynolds
Averaged Navier-Stokes (RANS) models combined with the
Level Set Flamelet Library approach. Large Eddy Simulation
(LES) has also been applied to the case.
In this paper the Zimont Turbulent Flame Closure (TFC)
model has been investigated in conjunction with the k-ε, k-ω,
SST k-ω and RSM RANS model implementations in ANSYS
CFX 10.0.
It is shown that the various RANS models generate
significantly different results in terms... (More) - The Volvo Aero Corp. (VAC) Triangular Bluff Body
Stabilized Combustion rig VR-1 has been extensively
researched both in terms of experiments and theoretical
treatment. Previous CFD work has concentrated on Reynolds
Averaged Navier-Stokes (RANS) models combined with the
Level Set Flamelet Library approach. Large Eddy Simulation
(LES) has also been applied to the case.
In this paper the Zimont Turbulent Flame Closure (TFC)
model has been investigated in conjunction with the k-ε, k-ω,
SST k-ω and RSM RANS model implementations in ANSYS
CFX 10.0.
It is shown that the various RANS models generate
significantly different results in terms of turbulent velocity and
integral length scale fields. These parameters influence the
computed turbulent flame speed. The turbulent viscosity fields
also differ substantially between the various RANS models.
This will affect the computed degree of flame front diffusion.
For the investigated case; the TFC model combined with
the k-ω model fairly accurately captures the recirculation zone
length and overall turbulent flame speed. The measured case
however displays Kelvin-Helmholtz induced oscillations of the
shear layers behind the bluff body. This will combine with the
free-stream turbulence and turbulence generated along the
upstream surfaces of the bluff body to distort the flame sheets.
The two flame fronts will also be subjected to other (unquantified)
combustion related instabilities. The combined
effect is not captured well in steady state RANS. The analysis
is therefore seen to grossly under-predict flame front diffusion,
regardless of turbulence model. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/716098
- author
- Eriksson, Pontus LU
- organization
- publishing date
- 2007
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Bluff Body, Kelvin-Helmholtz, Instability, RSM, SST, k-w, k-e, RANS, TFC, Afterburner, Zimont
- host publication
- Proceedings of ASME GT2007
- volume
- 2
- pages
- 8 pages
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- ASME Turbo Expo 2007
- conference location
- Montreal, Canada
- conference dates
- 2007-05-17
- external identifiers
-
- scopus:34548733697
- ISBN
- 0-7918-4791-8
- DOI
- 10.1115/GT2007-27480
- language
- English
- LU publication?
- yes
- id
- 261ed01a-f1ca-44aa-857b-0a3c01baa424 (old id 716098)
- date added to LUP
- 2016-04-04 11:53:40
- date last changed
- 2022-01-29 22:36:28
@inproceedings{261ed01a-f1ca-44aa-857b-0a3c01baa424,
abstract = {{The Volvo Aero Corp. (VAC) Triangular Bluff Body<br/><br>
Stabilized Combustion rig VR-1 has been extensively<br/><br>
researched both in terms of experiments and theoretical<br/><br>
treatment. Previous CFD work has concentrated on Reynolds<br/><br>
Averaged Navier-Stokes (RANS) models combined with the<br/><br>
Level Set Flamelet Library approach. Large Eddy Simulation<br/><br>
(LES) has also been applied to the case.<br/><br>
In this paper the Zimont Turbulent Flame Closure (TFC)<br/><br>
model has been investigated in conjunction with the k-ε, k-ω,<br/><br>
SST k-ω and RSM RANS model implementations in ANSYS<br/><br>
CFX 10.0.<br/><br>
It is shown that the various RANS models generate<br/><br>
significantly different results in terms of turbulent velocity and<br/><br>
integral length scale fields. These parameters influence the<br/><br>
computed turbulent flame speed. The turbulent viscosity fields<br/><br>
also differ substantially between the various RANS models.<br/><br>
This will affect the computed degree of flame front diffusion.<br/><br>
For the investigated case; the TFC model combined with<br/><br>
the k-ω model fairly accurately captures the recirculation zone<br/><br>
length and overall turbulent flame speed. The measured case<br/><br>
however displays Kelvin-Helmholtz induced oscillations of the<br/><br>
shear layers behind the bluff body. This will combine with the<br/><br>
free-stream turbulence and turbulence generated along the<br/><br>
upstream surfaces of the bluff body to distort the flame sheets.<br/><br>
The two flame fronts will also be subjected to other (unquantified)<br/><br>
combustion related instabilities. The combined<br/><br>
effect is not captured well in steady state RANS. The analysis<br/><br>
is therefore seen to grossly under-predict flame front diffusion,<br/><br>
regardless of turbulence model.}},
author = {{Eriksson, Pontus}},
booktitle = {{Proceedings of ASME GT2007}},
isbn = {{0-7918-4791-8}},
keywords = {{Bluff Body; Kelvin-Helmholtz; Instability; RSM; SST; k-w; k-e; RANS; TFC; Afterburner; Zimont}},
language = {{eng}},
pages = {{353--361}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
title = {{The Zimont TFC Model Applied to premixed Bluff Body Stabilized Combustion Using Four Different RANS Turbulence Models}},
url = {{http://dx.doi.org/10.1115/GT2007-27480}},
doi = {{10.1115/GT2007-27480}},
volume = {{2}},
year = {{2007}},
}