Abstract/Details

A numerical study of a laminar methane /air flame impinged upon by a two-dimensional counter-rotating vortex pair


2006 2006

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Abstract (summary)

Today's electricity, transportation, and manufacturing all fundamentally rely on the turbulent combustion of fuel. However, modeling the deep complexity inside a realistic turbulent flame is well beyond the capability of today's fastest computers. By studying flame/vortex interactions we can build insights that will illuminate much of the complex interplay of kinetics, fluid dynamics, and heat and mass transfer of turbulent combustion.

For this study, the interaction of a freely-propagating premixed methane-air flame with a two-dimensional counter-rotating vortex pair is simulated under fuel-rich conditions using a detailed C1-C2 chemical mechanism and mixture-averaged Dipole Reduced Formalism (DRFM) transport properties. The effect of the strength and size of the vortex pair on the transient flame response and the evolution of its structure along the centerline of the vortex pair are examined. Additional effects of initial air dilution and/or heating of the vortex pair are also analyzed. Further refinements of the distribution of added air are also postulated in an effort to reconcile previous experimental results observed by Nguyen and Paul (1996) and Najm et al. (1999). Observations of qualitative changes in the response of OH and CH, their source terms, and rate-of-progress variables are presented.

Indexing (details)


Subject
Mechanical engineering;
Chemical engineering;
Energy
Classification
0548: Mechanical engineering
0542: Chemical engineering
0791: Energy
Identifier / keyword
Applied sciences; Combustion; Impinging jets; Methane-air flames; Vortex pair
Title
A numerical study of a laminar methane /air flame impinged upon by a two-dimensional counter-rotating vortex pair
Author
Womeldorf, Carole A.
Number of pages
123
Publication year
2006
Degree date
2006
School code
0098
Source
DAI-B 66/12, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780542430817, 0542430819
Advisor
Knio, Omar M.
University/institution
The Johns Hopkins University
University location
United States -- Maryland
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3197251
ProQuest document ID
305319680
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305319680
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