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TNF Workshop Abstract

This workshop is an open and ongoing international collaboration among experimental and computational researchers in turbulent combustion. The current emphasis is on fundamental issues of turbulence-chemistry interactions in gaseous flames. The objectives are to:

  • Establish an internet library of well-documented flames that are appropriate for model validation and the advancement of basic scientific understanding of turbulent combustion.
  • Provide a framework for collaborative comparisons of measured and modeled results.
  • Identify priorities for further experimental and computational research.

The TNF library includes multiscalar and velocity data from several flows and flames that carry through a progression in complexity of the chemistry and the flow field. Having started with simple jet flames of hydrogen, our attention has moved to flames of simple hydrocarbon fuels (methane, natural gas, and methanol), which include modeling challenges such as local extinction and re-ignition, detached or lifted reaction zones, auto-ignition, flow recirculation, and swirl. 

Areas of increasing interest include combustion of more complex fuels and development of models that can address a broad range of combustion regimes, including nonpremixed, partially-premixed, stratified, and premixed flames. The selection of target flames and focus topics for future TNF Workshops will be based on the scientific interests of the organizers and active participants.


Past Workshops and main topics:

Naples, Italy

1996

TNF1

Establish framework

Heppenheim, Germany

1997

TNF2

Hydrogen jet flames and NO formation

Boulder, Colorado, USA

1998

TNF3

Piloted and bluff-body flames with CH4

Darmstadt, Germany

1999

TNF4

Extinction/re-ignition in piloted flames

Delft, Netherlands

2000

TNF5

Chemistry, mixing, and radiation submodels

Sapporo, Japan

2002

TNF6

Mixing models, bluff-body and swirl flames, new experiments

Chicago, Illinois, U.S.A.

2004

TNF7

Scalar dissipation, extinction and re-ignition, bluff-body and swirl flames, LES and DNS.

Heidelberg, Germany

2006

TNF8

Bluff-body and swirl flame comparisons, dissipation scales in flames, LES quality assessment, DNS, considerations for premixed model validation

Montreal, Canada

2008

TNF9

Planning for extension of model validation work to include a broader range of combustion modes and more complex hydrocarbon fuels, LES quality assessment, issues for comparing experiments and LES

Pleasanton, California, USA

2014

TNF12

Stratified flame comparisons, turbulent opposed jet flames, piloted DME flames, utilizing temporally-resolved data, enclosed and unsteady combustion, flame-wall interaction, LES quality and UQ, modeling of DNS cases


Contact:

For additional information or to be included on the TNF email distribution contact Robert Barlow (barlow@sandia.gov)

 

Acknowledgements:

Technical contributions to this site by the organizers and participants of the workshop series are gratefully acknowledged.  Sandia's role in coordinating TNF Workshop activities is supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences.

 
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