Damper for combustion oscillation damping in a gas turbine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F23R-003/04
F23R-003/00
F02C-003/14
출원번호
US-0444177
(2014-07-28)
등록번호
US-9970659
(2018-05-15)
우선권정보
EP-13180355.3 (2013-08-14)
발명자
/ 주소
Schuermans, Bruno
Bothien, Mirko Ruben
출원인 / 주소
ANSALDO ENERGIA IP UK LIMITED
대리인 / 주소
Buchanan Ingersoll & Rooney PC
인용정보
피인용 횟수 :
1인용 특허 :
5
초록▼
The invention relating to a A damper for combustion oscillation damping for a gas turbine, includes a resonator cavity with a box or cylinder shape, a neck in flow communication with the resonator cavity and a combustion chamber. The length Lneck of the neck is equal or greater than a maximum distan
The invention relating to a A damper for combustion oscillation damping for a gas turbine, includes a resonator cavity with a box or cylinder shape, a neck in flow communication with the resonator cavity and a combustion chamber. The length Lneck of the neck is equal or greater than a maximum distance lmax that a hot gas ingested from the combustion chamber reaches in the neck. The maximum distance lmax is determined according to the following equation: lmax=∫t1t2U-p^ρUζsin(ωt)dt. With the solution of the present invention, the damper used to damping combustion oscillation may prevent hot gas ingestion during normal operations by uniquely determining the dimensions of the neck connecting the resonator cavity and the combustion chamber.
대표청구항▼
1. A system for combustion oscillation damping for a gas turbine comprising: a damper, and a combustion chamber, wherein the damper includes:a resonator cavity having a cross section in a shape of one of a rectangle, a square or a cylinder, a neck in flow communication with the resonator cavity and
1. A system for combustion oscillation damping for a gas turbine comprising: a damper, and a combustion chamber, wherein the damper includes:a resonator cavity having a cross section in a shape of one of a rectangle, a square or a cylinder, a neck in flow communication with the resonator cavity and the combustion chamber, wherein a length Lneck of the neck is equal or greater than a maximum distance lmax, wherein a hot gas ingested from the combustion chamber will reach the maximum distance lmax in the neck, wherein the maximum distance lmax is determined according to an equation: lmax=∫t1t2U-p^ρUζsin(ωt)dt wherein U represents a mean flow velocity in the neck, {circumflex over (p)} represents a pressure amplitude in the combustion chamber, ρ represents a density of flow, and ζ represents a pressure loss coefficient, wherein the neck includes a first neck part and a second neck part, wherein the first neck part is proximate the combustion chamber and is made of a first material that is heat resistant, and the second neck part is distal from the combustion chamber and is made from a second material that is different from the first material, and wherein a length of the first neck part is dimensioned to be equal or larger than the maximum distance lmax. 2. The system according to claim 1, wherein the length Lneck of the neck is equal to 1.1˜2.0 times of the maximum distance lmax. 3. The system according to claim 1, wherein the length Lneck of the neck is equal to 1.4˜1.8 times of the maximum distance lmax. 4. The system according to claim 1, wherein the length Lneck of the neck is equal to 1.5 times of the maximum distance lmax. 5. The system according to claim 1, wherein the damper comprises: one or more spacers disposed in the resonator cavity to separate the resonator cavity into multiple parts, and an inlet tube disposed on the resonator cavity, wherein an effective diameter d of the inlet tube is determined in accordance with an equation: d=DU(3ρ4Δpc)1/4 wherein Δpc is a pressure over a cooling air supply, and D represents an effective diameter of the neck. 6. The system according to claim 5, wherein a cross section of the inlet tube is shaped as circular, square, rectangular or oval. 7. The system according to claim 1, wherein the length of the first neck part is dimensioned to be equal to 1.1˜2.0 times of the maximum distance lmax. 8. The system according to claim 1, wherein the length of the first neck part is dimensioned to be equal to 1.4˜1.8 times of the maximum distance lmax. 9. The system according to claim 1, wherein the length of the first neck part is dimensioned to be equal to 1.5 times of the maximum distance lmax. 10. The system according to claim 1, wherein a cross section of the neck is shaped as circular, square, rectangular or oval.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (5)
Paschereit, Christian Oliver; Weisenstein, Wolfgang; Flohr, Peter; Polifke, Wolfgang, Apparatus for damping acoustic vibrations in a combustor.
Sattinger, Stanley S.; Darling, Douglas Dean; Holbert, Roy Kyle; Kepes, William E., Modular resonators for suppressing combustion instabilities in gas turbine power plants.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.