Modeling turbulent flame propagation
Abstract
Laser diagnostics and flow simulation techniques axe now providing information that if available fifty years ago, would have allowed Damkoehler to show how turbulence generates flame area. In the absence of this information, many turbulent flame speed models have been created, most based on Kolmogorov concepts which ignore the turbulence vortical structure, Over the last twenty years, the vorticity structure in mixing layers and jets has been shown to determine the entrainment and mixing behavior and these effects need to be duplicated by combustion models. Turbulence simulations reveal the intense vorticity structure as filaments and simulations of passive flamelet propagation show how this vorticity Creates flame area and defines the shape of the expected chemical reaction surface. Understanding how volume expansion interacts with flow structure should improve experimental methods for determining turbulent flame speed. Since the last decade has given us such powerful new tools to create and see turbulent combustion microscopic behavior, it seems that a solution of turbulent combustion within the next decade would not be surprising in the hindsight of 2004.
- Authors:
- Publication Date:
- Research Org.:
- Sandia National Labs., Livermore, CA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10173690
- Report Number(s):
- SAND-94-8701C; CONF-940838-7
ON: DE94016618
- DOE Contract Number:
- AC04-76DR00789
- Resource Type:
- Conference
- Resource Relation:
- Conference: 25. combustion symposium,Irvine, CA (United States),1 Aug 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; FLAME PROPAGATION; TURBULENCE; MATHEMATICAL MODELS; VORTICES; REVIEWS; DIFFERENTIAL EQUATIONS; 400800; COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY
Citation Formats
Ashurst, W T. Modeling turbulent flame propagation. United States: N. p., 1994.
Web.
Ashurst, W T. Modeling turbulent flame propagation. United States.
Ashurst, W T. 1994.
"Modeling turbulent flame propagation". United States. https://www.osti.gov/servlets/purl/10173690.
@article{osti_10173690,
title = {Modeling turbulent flame propagation},
author = {Ashurst, W T},
abstractNote = {Laser diagnostics and flow simulation techniques axe now providing information that if available fifty years ago, would have allowed Damkoehler to show how turbulence generates flame area. In the absence of this information, many turbulent flame speed models have been created, most based on Kolmogorov concepts which ignore the turbulence vortical structure, Over the last twenty years, the vorticity structure in mixing layers and jets has been shown to determine the entrainment and mixing behavior and these effects need to be duplicated by combustion models. Turbulence simulations reveal the intense vorticity structure as filaments and simulations of passive flamelet propagation show how this vorticity Creates flame area and defines the shape of the expected chemical reaction surface. Understanding how volume expansion interacts with flow structure should improve experimental methods for determining turbulent flame speed. Since the last decade has given us such powerful new tools to create and see turbulent combustion microscopic behavior, it seems that a solution of turbulent combustion within the next decade would not be surprising in the hindsight of 2004.},
doi = {},
url = {https://www.osti.gov/biblio/10173690},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 1994},
month = {Mon Aug 01 00:00:00 EDT 1994}
}