Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1999-06-21
2000-11-21
Freay, Charles G.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
60 3932, 60 3937, F02C 728
Patent
active
061486043
ABSTRACT:
A combustion chamber assembly comprises a plurality of three stage lean burn combustion chambers (28) each of which comprises a primary combustion zone (36), a secondary combustion zone (40) and a tertiary combustion zone (44). Each of the combustion zones (36,40,44) is supplied with premixed fuel and air by respective fuel and air mixing ducts (76,78,80,92). A plurality of transition ducts (118) are provided at the downstream ends of the combustion chambers (28) to receive the exhaust gases. A damping ring (130) is connected to all of the transition ducts (118) by bolts (138) which pass through apertures (128) in flanges (126) on the transition ducts (118). The bolts (138) are biased by springs (142) such that frictional contact between the damping ring (130) and the flanges (126) damps harmful vibrations in the transition ducts (118).
REFERENCES:
patent: 4688378 (1987-08-01), Harris
patent: 5085038 (1992-02-01), Todman et al.
patent: 5265412 (1993-11-01), Bagepalli et al.
patent: 5353586 (1994-10-01), Taylor et al.
patent: 5592814 (1997-01-01), Palusis et al.
Pritchard David
Salt Allan J
Wrightham Roger
Freay Charles G.
Rolls-Royce plc
Taltavull W. Warren
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