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Mechanical swirler for a low-NO.sub.x, weak-swirl burner

Patent ·
OSTI ID:872178
 [1];  [2]
  1. Kensington, CA
  2. Berkeley, CA
+ Show Author Affiliations
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.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
DOE Contract Number:
AC03-76SF00098
Assignee:
Regents of University of California (Oakland, CA)
Patent Number(s):
US 5879148
OSTI ID:
872178
Country of Publication:
United States
Language:
English

References (2)

Development of a vane-swirler for use in a low NO{sub x} weak-swirl burner report October 1996
Measurement of Scalar Dissipation in Premixed Flames journal March 1996

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/431/
absence
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annular passage
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burner
burners
central
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combustion
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direct
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diverging
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fuel
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