EP 1624251 B1 20120229 - Apparatus for reducing thermoacoustic oscillations in combustion chambers with adjustable resonance frequency
Title (en)
Apparatus for reducing thermoacoustic oscillations in combustion chambers with adjustable resonance frequency
Title (de)
Vorrichtung zur Dämpfung von thermoakustischen Schwingungen in Brennkammern mit veränderbarer Resonanzfrequenz
Title (fr)
Dispositif pour atténuer les oscillations acoustiques dans les chambres combustion avec fréquence de résonance ajustable
Publication
Application
Priority
EP 04018395 A 20040803
Abstract (en)
[origin: EP1624251A1] A method for damping thermo acoustic vibrations, especially in the combustion chamber of a gas turbine engine uses at least one Helmholtz resonator (2) of a fixed volume and connected to the combustion chamber via a duct (5) with variable transmission. This enables the control system to vary the resonant frequency to match a range of operating conditions. The duct can comprise a number of sub ducts selected y a movable baffle, a rotating/sliding baffle to vary the effective length of the duct, or any suitable means.
IPC 8 full level
F23R 3/10 (2006.01); F23M 20/00 (2014.01)
CPC (source: EP)
F23M 20/005 (2015.01); F23R 3/002 (2013.01); F23R 2900/00014 (2013.01)
Designated contracting state (EPC)
CH DE GB IT LI
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04018395 A 20040803