NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Quantitative Species Measurements in Microgravity Combustion FlamesFlame-vortex interactions are canonical configurations that can be used to study the underlying processes occurring in complicated turbulent reacting flows. The elegant simplicity of the flame-vortex interaction permits the study of these complex interactions under relatively controllable experimental configurations, in contrast to direct measurements in turbulent flames. The ability to measure and model the fundamental phenomena that occur in a turbulent flame, but with time and spatial scales which are amenable to our diagnostics, permits significant improvements in the understanding of turbulent combustion under both normal and reduced gravity conditions. In this paper, we report absolute mole fraction measurements of methane in a reacting vortex ring. These microgravity experiments are performed in the 2.2-sec drop tower at NASA Glenn Research Center. In collaboration with Drs. Chen and Dahm at the University of Michigan, measured methane absorbances are incorporated into a new model from which the temperature and concentrations of all major gases in the flame can be determined at all positions and times in the development of the vortex ring. This is the first demonstration of the ITAC (Iterative Temperature with Assumed Chemistry) approach, and the results of these computations and analyses are presented in a companion paper by Dahm and Chen at this Workshop. We believe that the ITAC approach will become a powerful tool in understanding a wide variety of combustion flames under both equilibrium and non-equilibrium conditions.
Document ID
20010074009
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Silver, Joel A.
(Southwest Sciences, Inc. Santa Fe, NM United States)
Wood, William R.
(Southwest Sciences, Inc. Santa Fe, NM United States)
Chen, Shin-Juh
(Michigan Univ. Ann Arbor, MI United States)
Dahm, Werner J. A.
(Michigan Univ. Ann Arbor, MI United States)
Piltch, Nancy D.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 20, 2013
Publication Date
May 1, 2001
Publication Information
Publication: Sixth International Microgravity Combustion Workshop
Subject Category
Inorganic, Organic And Physical Chemistry
Funding Number(s)
CONTRACT_GRANT: NAS3-99140
CONTRACT_GRANT: NAG3-1639
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available