Combustion – Flame holder having protective flame enclosing or flame...
Patent
1993-11-03
1996-05-14
Dority, Carroll B.
Combustion
Flame holder having protective flame enclosing or flame...
431354, 239552, F23D 1446
Patent
active
055162800
ABSTRACT:
An apparatus for enabling a burner to stably burn a lean fuel/air mixture. The burner directs the lean fuel/air mixture in a stream. The apparatus comprises an annular flame stabilizer; and a device for mounting the flame stabilizer in the fuel/air mixture stream. The burner may include a body having an internal bore, in which case, the annular flame stabilizer is shaped to conform to the cross-sectional shape of the bore, is spaced from the bore by a distance greater than about 0.5 mm, and the mounting device mounts the flame stabilizer in the bore. An apparatus for burning a gaseous fuel with low NOx emissions comprises a device for premixing air with the fuel to provide a lean fuel/air mixture; a nozzle having an internal bore through which the lean fuel/air mixture passes in a stream; and a flame stabilizer mounted in the stream of the lean fuel/air mixture. The flame stabilizer may be mounted in the internal bore, in which case, it is shaped and is spaced from the bore as just described. In a method of burning a lean fuel/air mixture, a lean fuel/air mixture is provided, and is directed in a stream; an annular eddy is created in the stream of the lean fuel/air mixture; and the lean fuel/air mixture is ignited at the eddy.
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B. Bedat, L. W. Kostiuk, R. K. Cheng, "Characterization of Acoustic Effects on Flame Structures by Beam Deflection Technique", Oct. 1993/Lawrence Berkeley Laboratory University of California-Energy & Environment Division. 15 pages.
L. W. Kostiuk, L. Zhou, R. K. Chang, "The Effects of Gravity on Wrinkled Laminar Flames", Sep. 1992/Lawrence Berkeley Laboratory/University of California-Energy & Environment Division. 17 pages.
Cheng Robert K.
Kostiuk Larry W.
Dority Carroll B.
Martin Paul R.
The Regents University of California
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