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

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.

Inventors:
 [1];  [2]
  1. Kensington, CA
  2. Berkeley, CA
Issue Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
872178
Patent Number(s):
5879148
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23R - GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
mechanical; swirler; low-no; weak-swirl; burner; disclosed; generating; diverging; flow; lean; premixed; fuel; burners; central; passage; entrance; accepting; feed; gas; balancing; insert; introduces; additional; pressure; drop; occurring; absence; exit; aligned; direct; combustor; annular; including; vanes; oriented; impart; angular; momentum; exiting; generated; stabilizes; combustion; allowing; production; pollutants; particularly; oxides; nitrogen; central passage; lean combustion; annular passage; fuel burner; pressure drop; feed gas; lean premixed; gas exit; mechanical swirler; gas exiting; mixed fuel; swirl burner; premixed fuel; /431/

Citation Formats

Cheng, Robert K, and Yegian, Derek T. Mechanical swirler for a low-NO.sub.x, weak-swirl burner. United States: N. p., 1999. Web.
Cheng, Robert K, & Yegian, Derek T. Mechanical swirler for a low-NO.sub.x, weak-swirl burner. United States.
Cheng, Robert K, and Yegian, Derek T. Fri . "Mechanical swirler for a low-NO.sub.x, weak-swirl burner". United States. https://www.osti.gov/servlets/purl/872178.
@article{osti_872178,
title = {Mechanical swirler for a low-NO.sub.x, weak-swirl burner},
author = {Cheng, Robert K and Yegian, Derek T},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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Works referenced in this record:

Measurement of Scalar Dissipation in Premixed Flames
journal, March 1996