EP 1624251 A1 20060208 - 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)
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)
Citation (search report)
- [A] DE 10058688 A1 20030102 - ALSTOM SWITZERLAND LTD [CH]
- [A] EP 0723123 A1 19960724 - FASTO NEFIT BV [NL]
- [A] DE 4414232 A1 19951026 - ABB MANAGEMENT AG [CH]
- [A] WO 2004051063 A1 20040617 - MITSUBISHI HEAVY IND LTD [JP], et al
- [AD] DE 10004991 A1 20010809 - VOLKSWAGEN AG [DE]
Designated contracting state (EPC)
CH DE GB IT LI
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04018395 A 20040803