초록 ▼

The devices and methods according to the invention are used to attenuate acoustic and/or thermoacoustic oscillations in a combustor. The combustor may be, in most cases, constructed as a premixing combustor with low emissions of noxious substances and includes a fluid supply device, an antechamber,

The devices and methods according to the invention are used to attenuate acoustic and/or thermoacoustic oscillations in a combustor. The combustor may be, in most cases, constructed as a premixing combustor with low emissions of noxious substances and includes a fluid supply device, an antechamber, a premixing device, and a combustion chamber. The fluid is supplied to the combustion chamber completely or almost completely through the front panel located in the front. The combustion chamber has at least one recirculation opening for attenuating the oscillations. It is furthermore advantageous that an attenuation volume and an injector be provided. The recirculation opening preferably merges at least in part with the attenuation volume. By means of the injector, the combustor is supplied with a more compressed fluid in order to ensure an adequate and clear pressure drop across the combustor.

대표청구항 ▼

1. A combustor for a turbo machine, comprising:a fluid supply device for a combustion air flow; and a combustion chamber comprising an upstream end and a downstream end, with a front panel arranged at the upstream end, at least one burner arranged at said front panel, said at least one burner being

1. A combustor for a turbo machine, comprising:a fluid supply device for a combustion air flow; and a combustion chamber comprising an upstream end and a downstream end, with a front panel arranged at the upstream end, at least one burner arranged at said front panel, said at least one burner being adapted and arranged to receive essentially the full combustion air flow from the fluid supply device; said burner providing a fluid communication for the combustion air flow which is directed from the fluid supply device into the combustion chamber; at least one opening providing fluid communication between the combustion chamber and the fluid supply device; wherein a contour of a flow cross section of the fluid supply device is chosen to provide at least one point where the static pressure, under full load conditions, is essentially balanced with respect to a static pressure inside the combustion chamber; and wherein the at least one opening merges with the fluid supply device at said at least one point of balanced static pressure, such that an inflow of fluid from the fluid supply device into the combustion chamber through said at least one opening is essentially avoided.