Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1979-01-22
1981-02-10
Gill, James J.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
60738, 60 3982P, F23R 330, F23R 350
Patent
active
042493730
ABSTRACT:
A gas turbine engine comprises an annular combustion chamber (13) intended for low nitrogen oxide emission. The chamber has a pre-mixing section (20) in which an air-fuel mixture is brought to a significant degree of vaporization before issuing through a grill (22) at the end of the pre-mixing section into a main section (21) of the chamber. Pilot sections (18,19) at opposite sides of the pre-mixing section have outlets (28,29) through which burning mixture from the pilot sections is discharged into main section (21). The grill (22) defines openings (35) through which the fresh mixture from the pre-mixing section (20) is discharged across the outlets (28,29) of the pilot sections (18,19) to mix with and become ignited by the burning mixture.
The pre-mixing section (20) is an annular duct (33) having walls (15,16) which extend in the direction of the axis of the chamber and are straight in that direction though slightly convergent. The arrangement favors vaporization in the duct without auto-ignition.
REFERENCES:
patent: 2931174 (1960-04-01), Allen
patent: 3430443 (1969-03-01), Richardson et al.
Parnell David H.
Sotheran Arthur
Gill James J.
Rolls-Royce Ltd.
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