Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1995-05-26
1997-11-11
Koczo, Michael
Power plants
Combustion products used as motive fluid
Combustion products generator
431114, F02C 724
Patent
active
056851570
ABSTRACT:
An apparatus for suppressing or attenuating acoustic pressure oscillations in a gas turbine engine combustor, the apparatus having a quarter wave resonator with a cavity closed at a first end and open at a second end and a characteristic length that reflects waves 180 degrees out of phase with the incoming waves and a viscous damper at the open end of the cavity. At least one resonating tube with a closed end and an open end and a single cavity therebetween, a damping plate with a plurality of apertures therethrough disposed across the open end, and a means for mounting the tube on the engine so that the damping plate is essentially flush with the wall. The apertures preferably have a total open area that is about 8% of an inclusive area of the open end and the tube may be cylindrical and the apertures circular. The tube preferably has a centerline through the cavity with a characteristic length extending from the closed end to the damping plate wherein the characteristic length is essentially equal to a quarter of a wavelength of an acoustic pressure oscillation produced in the combustor having a predetermined acoustic frequency.
REFERENCES:
patent: 2807931 (1957-10-01), Bodine
patent: 3601985 (1971-08-01), Bauger
patent: 3850261 (1974-11-01), Hehmann
patent: 4122674 (1978-10-01), Andersson et al.
patent: 4150732 (1979-04-01), Hoch et al.
patent: 4199936 (1980-04-01), Cowan et al.
patent: 4244441 (1981-01-01), Tolman
patent: 4557106 (1985-12-01), Williams et al.
patent: 4944362 (1990-07-01), Motsinger et al.
patent: 4974568 (1990-12-01), Cser
patent: 5345768 (1994-09-01), Washam et al.
patent: 5373695 (1994-12-01), Aigner et al.
Carter Bruce A.
Hehmann Horst W. W.
Pandalai Raghavan P.
General Electric Company
Hess Andrew C.
Koczo Michael
Traynham Wayne O.
LandOfFree
Acoustic damper for a gas turbine engine combustor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acoustic damper for a gas turbine engine combustor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustic damper for a gas turbine engine combustor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1220434