Combustion – Process of combustion or burner operation – Flame shaping – or distributing components in combustion zone
Patent
1997-04-16
1999-03-09
Price, Carl D.
Combustion
Process of combustion or burner operation
Flame shaping, or distributing components in combustion zone
431350, 431354, F23D 1462
Patent
active
058791485
ABSTRACT:
Disclosed is a mechanical swirler for generating diverging flow in lean premixed fuel burners. The swirler of the present invention includes a central passage with an entrance for accepting a feed gas, a flow balancing insert that introduces additional pressure drop beyond that occurring in the central passage in the absence of the flow balancing insert, and an exit aligned to direct the feed gas into a combustor. The swirler also has an annular passage about the central passage and including one or more vanes oriented to impart angular momentum to feed gas exiting the annular passage. The diverging flow generated by the swirler stabilizes lean combustion thus allowing for lower production of pollutants, particularly oxides of nitrogen.
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J. M. Beer and N. A. Chigier, "Swirling Flows", 1983Combustion Aerodynamics.
D. T. Yegian and R. K. Cheng, "Development of a Vane-Swirler for Use In a Low NO.sub.x Weak-Swirl Burner", 1996, Presented at the American Flame Research Committee 1996, International Symposium, Baltimore, Maryland, Oct. 2, 1996.
F. O'Young and R. W. Bilger, "Measurement of Scalar Dissipation in Premixed Flames", 1996, Combustion Science Technology vol. 113-114, pp. 393-411.
Cheng Robert K.
Yegian Derek T.
Price Carl D.
The Regents of the University of California
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