# US 2014/0196468 A1 · Combustion arrangement and turbine comprising a damping facility > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196468 A1 - Document ID: US20140196468A1 - Status: Published application - Kind: A1 - Application number: 14/237,870 - Filed: 2012-07-24 - Published: 2014-07-17 - Earliest claimed: 2011-08-17 - Assignees: Siemens Aktiengesellschaft - Inventors: Ghenadie Bulat - Web page: https://patentgrep.com/patent/US20140196468A1 ## CPC - F23R 3/26: Controlling the air flow - F02C 7/24: Heat or noise insulation (air intakes having provisions for noise suppression F02C7/045; turbine exhaust heads, chambers, or the like F01D25/30; silencing nozzles of jet-propulsion plants F02K1/00) - F23R 3/54: Reverse-flow combustion chambers - F23R 2900/00013: Reducing thermo-acoustic vibrations by active means - F23R: GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures F23C10/16) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) ## Abstract A combustion arrangement for a turbine is provided including: a casing; a combustion chamber within the casing, an inner casing volume may be defined as a volume inside the casing but outside the combustion chamber; a partitioning wall partitioning the inner casing volume into first and second volume portions, the partitioning wall may have at least one aperture to allow fluid communication between the first and second volume portions; and a valve may be arranged at the casing to allow an outgoing fluid flow from the inner casing volume to an outside of the casing depending on a valve operating position. The combustion chamber has a combustion entry port for supplying an oxidant into the combustion chamber, where the combustion entry port may be in fluid communication with the first volume portion. The arrangement may be adapted to adjust the valve operating position for damping an oscillation of the arrangement. ## Claims ### Claim 1 A combustion arrangement comprising: a casing; a combustion chamber arranged within the casing, wherein an inner casing volume is defined to be a volume inside the casing but outside the combustion chamber; a partitioning wall partitioning the inner casing volume into a first volume portion and a second volume portion, the partitioning wall having at least one aperture to allow fluid communication between the first volume portion and the second volume portion; and a valve arranged at the casing to allow an outgoing fluid flow from the inner casing volume to an outside of the casing depending on a valve operating position; wherein the combustion chamber has a combustion entry port for supplying an oxidant into the combustion chamber, wherein the combustion entry port is in fluid communication with the first volume portion, wherein the arrangement is adapted to adjust the valve operating position for damping an oscillation of the arrangement. ### Claim 2 (depends on 1) The combustion arrangement according to claim 1, wherein the valve is arranged to allow the fluid flow from the second volume portion to flow outside of the casing depending on a valve operating position. ### Claim 3 (depends on 1) The combustion arrangement according to claim 1, wherein the casing further comprises a casing entry port for supplying an ingoing fluid flow of the oxidant into the first volume portion, wherein the valve is adapted to adjust the valve operating position such that a range from 0% to 20% of the ingoing fluid flow of the oxidant supplied to the first volume portion is lead via the second volume portion, to flow outside of the casing. ### Claim 4 (depends on 1) The combustion arrangement according to claim 1, wherein the combustion arrangement is adapted to adjust the valve operating position based on amplitude of the oscillation. ### Claim 5 (depends on 4) The combustion arrangement according to claim 4, wherein the combustion arrangement is adapted to adjust the valve operating position to increase the fluid flow through the valve, if the amplitude of oscillation to be damped increases. ### Claim 6 (depends on 4) The combustion arrangement according to claim 4, further comprising: a controller communicatively connected to the valve, wherein the controller is adapted to adjust the valve operating position based on an operating state of the combustion arrangement. ### Claim 7 (depends on 6) The combustion arrangement according to claim 6, wherein the controller is adapted to adjust the valve operating position based on a detected oscillation of the combustion chamber, the casing and/or the combustion arrangement and/or based on a combustion chamber exit temperature and/or based on the ingoing fluid flow of the oxidant and/or based on a fuel flow supplied into the combustion chamber and/or based on a material and/or a geometry of the arrangement. ### Claim 8 (depends on 1) The combustion arrangement according to claim 1, wherein the partitioning wall circumferentially surrounds a longitudinal axis of the combustion chamber. ### Claim 9 (depends on 1) The combustion arrangement according to claim 1, wherein the partitioning wall further comprises: at least one further aperture, wherein the one further aperture is arranged at a first radial position different from a second radial position of the aperture, wherein the aperture and the further aperture comprise counter-directional tapered shapes. ### Claim 10 (depends on 1) The combustion arrangement according to claim 1, wherein the aperture of the partitioning wall comprises a tapered shape. ### Claim 11 (depends on 1) The combustion arrangement according to claim 1, wherein the partitioning wall is axially arranged downstream, as defined by a flow direction of a combustion product exhausted by the combustion chamber of a center of the combustion chamber. ### Claim 12 (depends on 1) A gas turbine, the turbine comprising the combustion arrangement according to claim 1. ### Claim 13 (depends on 12) The turbine according to claim 12, comprising a high pressure turbine section being driven by an burnt mixture of fuel and the oxidant exhausted by the combustion chamber, wherein a casing portion at least partly delimiting the second volume portion is in thermal contact with a high pressure section passageway of the exhausted burnt mixture. ### Claim 14 (depends on 1) A method for operating a combustion arrangement as claimed in claim 1, comprising adjusting the valve operating position for damping an oscillation of the arrangement. ### Claim 15 (depends on 3) The combustion arrangement according to claim 3, wherein the range is from 0% to 10%.