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Effects of Buoyancy on the Flowfields of Lean Premixed Turbulent V-FlamesOpen laboratory turbulent flames used for investigating fundamental flame turbulence interactions are greatly affected by buoyancy. Though much of our current knowledge is based on observations made in open flames, buoyancy effects are usually not considered in data interpretation, numerical analysis or theories. This inconsistency remains an obstacle to merging experimental observations and theoretical predictions. To better understanding the effects of buoyancy, our research focuses on steady lean premixed flames propagating in fully developed turbulence. We hypothesize that the most significant role of buoyancy forces on these flames is to influence their flowfields through a coupling with the mean and the fluctuating pressure fields. This coupling relates to the elliptical problem that emphasizes the importance of the upstream, wall and downstream boundary conditions in determining all aspects of flame propagation. Therefore, buoyancy has the same significance as other parameters such as flow configuration, and flame geometry.
Document ID
19990054026
Acquisition Source
Headquarters
Document Type
Conference Paper
Authors
Cheng, R. K.
(California Univ., Lawrence Berkeley Lab. Berkeley, CA United States)
Bedat, B.
(California Univ., Lawrence Berkeley Lab. Berkeley, CA United States)
Yegian, D. T.
(California Univ., Lawrence Berkeley Lab. Berkeley, CA United States)
Greenberg, P.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 19, 2013
Publication Date
May 1, 1999
Publication Information
Publication: Fifth International Microgravity Combustion Workshop
Subject Category
Inorganic And Physical Chemistry
Funding Number(s)
CONTRACT_GRANT: NASA Order C-32000-R
CONTRACT_GRANT: DE-AC03-76F00098
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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