Apparatus for reducing thermoacoustic oscillations in combustion chambers with adjustable resonance frequency

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 res...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	PRADE, BERND, BETHKE, SVEN, HUTH, MICHAEL, BUCHAL, TOBIAS, NIMPTSCH, HARALD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FORCOMBUSTION CHAMBERS, e.g. FIREBRIDGES COMBUSTION APPARATUS COMBUSTION PROCESSES DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDEDFOR DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS INCOMBUSTION CHAMBERS GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGHVELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS HEATING LIGHTING MECHANICAL ENGINEERING SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTIONAPPARATUS WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	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.