Method and device for affecting thermoacoustic oscillations in combustion systems
View Patent ↗The present invention relates to a method and a device for affecting thermoacoustic oscillations in a combustion system (i) comprising at least one burner ( 2 ) and at least one combustor ( 3 ), modulated injection of fuel being carried out. In order to improve the action of affecting the thermoacoustic oscillations, the modulated injection of the fuel is carried out into a recirculation zone ( 7 ) which forms in the combustor ( 3 ).
1. A method of affecting thermoacoustic oscillations in a combustion system having at least one burner and at least one combustor, the method comprising:
modulating fuel injection into a recirculation zone which forms in the combustor, wherein the total quantity of fuel injection comprises a first quantity and a second quantity;
injecting the first quantity of fuel at a constant rate; and
injecting the second quantity of fuel in a modulated manner.
2. The method as claimed in claim 1 , wherein the second quantity of fuel is smaller than the first quantity of fuel.
3. The method as claimed in claim 1 , wherein the second quantity of fuel is approximately between 6% and 1% of the total quantity of fuel.
4. A method of affecting thermoacoustic oscillations in a combustion system having at least one burner and at least one combustor, the method comprising:
modulating fuel injection into a recirculation zone which forms in the combustor, wherein said modulating fuel injection is performed independently of an oscillation phase of the thermoacoustic oscillations.
5. A method of affecting thermoacoustic oscillations in a combustion system having at least one burner and at least one combustor, the method comprising:
modulating fuel injection into a recirculation zone which forms in the combustor, wherein said modulating fuel injection is coupled to an oscillation phase of the thermoacoustic oscillations.
6. A method of affecting thermoacoustic oscillations in a combustion system having at least one burner and at least one combustor, the method comprising:
modulating fuel injection into a recirculation zone which forms in the combustor, wherein said modulating fuel injection is performed exclusively into the recirculation zone.
7. A method of affecting thermoacoustic oscillations in a combustion system having at least one burner and at least one combustor, the method comprising:
modulating fuel injection into a recirculation zone which forms in the combustor, wherein said injection of fuel into the recirculation zone is performed exclusively in a modulated manner.