Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Large Eddy Simulation of Bluff-Body Flame Approaching Blow-Off: A Sensitivity Study
Queens Univ Belfast, Sch Mech & Aerosp Engn, Belfast, Antrim, North Ireland.;Lund Univ, Dept Energy Sci, Lund, Sweden..
Univ Birmingham, Dept Mech Engn, Birmingham, W Midlands, England..
Lund Univ, Dept Energy Sci, Lund, Sweden..
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0001-5886-415X
Show others and affiliations
2019 (English)In: Combustion Science and Technology, ISSN 0010-2202, E-ISSN 1563-521X, Vol. 191, no 10, p. 1815-1842Article in journal (Refereed) Published
Abstract [en]

As almost all combustion processes of practical interest take place in the presence of turbulence, the development of the increasingly refined turbulence-chemistry interaction (TCI) models has led to highly sophisticated approaches. Nearly all of the studies comparing different models focus on stable premixed/non-premixed flame configurations. In this work, the focus is on well-documented, lean premixed bluff-body stabilized flames approaching blow-off and on the blow-off sequence itself. Large Eddy Simulations (LES) have been used to capture the time-dependent, three-dimensional flow-field using Transported Probability Density Function (TPDF), Partially Stirred Reactor Model (PaSR), and Implicit LES (ILES) models. Furthermore, the influence of finite-rate chemistry and different chemical mechanisms is evaluated to determine the limitation and capability of the different TCI approaches for modeling flames just prior to and during the transient blow-off process. While the average flow-fields do not reveal any significant differences between modeling approaches, detailed analysis of the flame reveals that there are differences in the predicted flame thickness and composition. The ability of the considered TCI models to predict local as well as full-flame extinction during the blow-off is investigated as well. It is demonstrated that such a blow-off sequence is not always governed by complex chemistry.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS INC , 2019. Vol. 191, no 10, p. 1815-1842
Keywords [en]
Bluff-body, Blow off (BO), Large Eddy Simulation (LES), turbulence-chemistry interaction (TCI), Transported Probability Density Function (TPDF), Partially Stirred Reactor model (PaSR), Implicit LES (ILES)
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-259407DOI: 10.1080/00102202.2018.1536125ISI: 000482940900004OAI: oai:DiVA.org:kth-259407DiVA, id: diva2:1354359
Note

QC 20190925

Available from: 2019-09-25 Created: 2019-09-25 Last updated: 2019-09-25Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Duwig, ChristopheFuchs, Laszlo

Search in DiVA

By author/editor
Duwig, ChristopheFuchs, Laszlo
By organisation
Mechanics
In the same journal
Combustion Science and Technology
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 3 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf