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Record Details

Record 25 of 4407
Buoyancy induced extinction of laminar gas jet diffusion flames
Author and Affiliation:
Altenkirch, R. A.(Kentucky Univ., Lexington, KY, United States)
Eichhorn, R.(Kentucky Univ., Lexington, KY, United States)
Brancic, A. B.(Kentucky, University, Lexington, Ky., United States)
Abstract: The behavior of laminar gas jet diffusion flames subjected to elevated gravity in order to investigate the role of buoyancy in such flames has been studied experimentally. Higher than earth normal gravity was achieved using a 1.83 m diameter centrifuge. Methane, ethane, propane and hydrogen air flames were stabilized at the exit of small tubular burners ranging in size from .05 to .21 cm in diameter. The experimental arrangement was such that the flames were burnt vertically upward. Following a shortening of the flame and a decrease in luminosity with increasing gravity level, further increases in gravity caused the hydrocarbon flames to separate from the rim and eventually extinguish. The extinction gravity levels appear to correlate with the parameter g alpha (u)/S to the 3rd (u), which should be a constant for buoyancy controlled extinction. This parameter is developed by a rudimentary analysis of the heat loss from the premixed stabilizing flame in the lifted flame base. When the loss is excessive, the flame is extinguished.
Publication Date: Mar 01, 1977
Document ID:
19780028666
(Acquired Dec 01, 1995)
Accession Number: 78A12575
Subject Category: INORGANIC AND PHYSICAL CHEMISTRY
Document Type: Conference Paper
Publisher Information: United States
Meeting Information: Spring Technical Meeting; Mar. 28-30, 1977; Cleveland, OH
Meeting Sponsor: Combustion Institute
Contract/Grant/Task Num: NGR-18-001-083
Financial Sponsor: NASA; United States
Organization Source: Kentucky Univ.; Lexington, KY, United States
Description: 17p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BUOYANCY; COMBUSTION CONTROL; DIFFUSION FLAMES; FLAME STABILITY; GAS JETS; CENTRIFUGES; EXTINGUISHING; FLAMEOUT; HIGH ACCELERATION; HYDROCARBON COMBUSTION; LAMINAR FLOW; METHANE; SPACECRAFT PROPULSION
Imprint And Other Notes: Combustion Institute, Spring Technical Meeting, Cleveland, Ohio, Mar. 28-30, 1977, Paper. 17 p.
Availability Source: Other Sources
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