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:
-
- Kensington, CA
- Berkeley, CA
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (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 F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR
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}
}
Works referenced in this record:
Measurement of Scalar Dissipation in Premixed Flames
journal, March 1996
- O'Young, F.; Bilger, R. W.
- Combustion Science and Technology, Vol. 113, Issue 1
Development of a vane-swirler for use in a low NO{sub x} weak-swirl burner
report, October 1996
- Yegian, D. T.; Cheng, R. K.