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Effects of buoyancy on gas jet diffusion flamesThe objective of this effort was to gain a better understanding of the fundamental phenomena involved in laminar gas jet diffusion flames in the absence of buoyancy by studying the transient phenomena of ignition and flame development, (quasi-) steady-state flame characteristics, soot effects, radiation, and, if any, extinction phenomena. This involved measurements of flame size and development, as well as temperature and radiation. Additionally, flame behavior, color, and luminosity were observed and recorded. The tests quantified the effects of Reynolds number, nozzle size, fuel reactivity and type, oxygen concentration, and pressure on flame characteristics. Analytical and numerical modeling efforts were also performed. Methane and propane flames were studied in the 2.2 Second Drop Tower and the 5.18-Second Zero-Gravity Facility of NASA LeRC. In addition, a preliminary series of tests were conducted in the KC-135 research aircraft. Both micro-gravity and normal-gravity flames were studied in this program. The results have provided unique and new information on the behavior and characteristics of gas jet diffusion flames in micro-gravity environments.
Document ID
19930021842
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Bahadori, M. Yousef (Science Applications International Corp. Torrance, CA, United States)
Edelman, Raymond B. (Science Applications International Corp. Torrance, CA, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1993
Subject Category
Materials Processing
Report/Patent Number
NASA-CR-191109
E-7720
NAS 1.26:191109
Accession Number
93N31031
Funding Number(s)
PROJECT: RTOP 694-03-0A
CONTRACT_GRANT: NAS3-22822
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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