Ultralean low swirl burner
- Kensington, CA
A novel burner and burner method has been invented which burns an ultra lean premixed fuel-air mixture with a stable flame. The inventive burning method results in efficient burning and much lower emissions of pollutants such as oxides of nitrogen than previous burners and burning methods. The inventive method imparts weak swirl (swirl numbers of between about 0.01 to 3.0) on a fuel-air flow stream. The swirl, too small to cause recirculation, causes an annulus region immediately inside the perimeter of the fuel-air flow to rotate in a plane normal to the axial flow. The rotation in turn causes the diameter of the fuel-air flow to increase with concomitant decrease in axial flow velocity. The flame stabilizes where the fuel-air mixture velocity equals the rate of burning resulting in a stable, turbulent flame.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- Assignee:
- Regents, University of California (Oakland, CA)
- Patent Number(s):
- US 5735681
- OSTI ID:
- 871456
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
swirl
burner
novel
method
invented
burns
ultra
lean
premixed
fuel-air
mixture
stable
flame
inventive
burning
results
efficient
emissions
pollutants
oxides
nitrogen
previous
burners
methods
imparts
weak
01
flow
stream
recirculation
causes
annulus
region
immediately
inside
perimeter
rotate
plane
normal
axial
rotation
diameter
increase
concomitant
decrease
velocity
stabilizes
equals
rate
resulting
turbulent
plane normal
air flow
flow velocity
air mixture
fuel-air mixture
axial flow
flow stream
inventive method
lean premixed
method results
mixed fuel
swirl burner
premixed fuel
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