External combustor for gas turbine engine

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867867

Santanam, Chandran B ^[1]; Thomas, William H ^[1]; DeJulio, Emil R ^[2]

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1. Indianapolis, IN
2. Columbus, IN

An external combustor for a gas turbine engine has a cyclonic combustion chamber into which combustible gas with entrained solids is introduced through an inlet port in a primary spiral swirl. A metal draft sleeve for conducting a hot gas discharge stream from the cyclonic combustion chamber is mounted on a circular end wall of the latter adjacent the combustible gas inlet. The draft sleeve is mounted concentrically in a cylindrical passage and cooperates with the passage in defining an annulus around the draft sleeve which is open to the cyclonic combustion chamber and which is connected to a source of secondary air. Secondary air issues from the annulus into the cyclonic combustion chamber at a velocity of three to five times the velocity of the combustible gas at the inlet port. The secondary air defines a hollow cylindrical extension of the draft sleeve and persists in the cyclonic combustion chamber a distance of about three to five times the diameter of the draft sleeve. The hollow cylindrical extension shields the drive sleeve from the inlet port to prevent discharge of combustible gas through the draft sleeve.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-76
• Assignee: General Motors Corporation (Detroit, MI)
• Patent Number(s): US 5024170
• OSTI ID: 867867
• Country of Publication: United States
• Language: English

Related Subjects

external
combustor
gas
turbine
engine
cyclonic
combustion
chamber
combustible
entrained
solids
introduced
inlet
primary
spiral
swirl
metal
draft
sleeve
conducting
hot
discharge
stream
mounted
circular
wall
latter
adjacent
concentrically
cylindrical
passage
cooperates
defining
annulus
connected
source
secondary
air
issues
velocity
five
times
defines
hollow
extension
persists
distance
diameter
shields
drive
prevent
hollow cylindrical
gas inlet
turbine engine
combustion chamber
gas turbine
hot gas
combustible gas
secondary air
gas discharge
external combustor
entrained solid
entrained solids
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