Swirler having vanes provided with at least two lobes in opposite transverse directions with reference to a vane central plane
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F23R-003/14
F23C-007/00
출원번호
US-0470109
(2012-05-11)
등록번호
US-9347663
(2016-05-24)
우선권정보
CH-794/11 (2011-05-11)
발명자
/ 주소
Poyyapakkam, Madhavan Narasimhan
Biagioli, Fernando
Syed, Khawar
Mao, Ronghai
Bernero, Stefano
출원인 / 주소
GENERAL ELECTRIC TECHNOLOGY GMBH
대리인 / 주소
Buchanan Ingersoll & Rooney PC
인용정보
피인용 횟수 :
1인용 특허 :
13
초록▼
A swirler including an annular housing with limiting walls. At least two vanes are arranged in the annular housing including the sidewalls of the swirler. The leading edge area of each vane has a profile, which is oriented parallel to a main flow direction prevailing at the leading edge position, wh
A swirler including an annular housing with limiting walls. At least two vanes are arranged in the annular housing including the sidewalls of the swirler. The leading edge area of each vane has a profile, which is oriented parallel to a main flow direction prevailing at the leading edge position, wherein the profiles of the vanes turn from the main flow direction prevailing at the leading edge position to impose a swirl on the flow, and wherein, with reference to a central plane of the vanes the trailing edges are provided with at least two lobes in opposite transverse directions. A burner for a combustion chamber of a gas turbine including such a swirler and at least one nozzle having its outlet orifice at or in a trailing edge of the vane and to a method of operation of such a burner.
대표청구항▼
1. A swirler, comprising: an annular housing with limiting walls having an inlet area, and an outlet area in a first main flow direction prevailing in the swirler;at least two vanes, arranged in the annular housing, each vane having a streamlined cross-sectional profile, which extends with a longitu
1. A swirler, comprising: an annular housing with limiting walls having an inlet area, and an outlet area in a first main flow direction prevailing in the swirler;at least two vanes, arranged in the annular housing, each vane having a streamlined cross-sectional profile, which extends with a longitudinal direction perpendicularly or at an inclination to the first main flow direction; wherein a leading edge area of each vane has a profile, which is oriented parallel to a second main flow direction prevailing at a leading edge position, and wherein the profiles of the vanes turn from the second main flow direction prevailing at the leading edge position to impose a swirl on the flow, wherein, with reference to a central plane of the vanes, trailing edges are provided with at least two lobes alternatingly extending out of the central plane in opposite transverse directions;wherein a traverse deflection from the central plane of two adjacent vanes, which form the lobes, are inverted, and a transition from a planar leading edge region to the deflections is smooth with a surface curvature representing a function with a continuous first derivative;wherein a transverse displacement of each vane forming the lobes, is at most, in the downstream two thirds of a length of the vane and the transverse displacement of each vane, which forms the lobes, has a sinusoidal form or a semi-circular form or a triangular form or a rectangular form. 2. A swirler, comprising: an annular housing with limiting walls having an inlet area, and an outlet area in a first main flow direction prevailing in the swirler;at least two vanes, arranged in the annular housing, each vane having a streamlined cross-sectional profile, which extends with a longitudinal direction perpendicularly or at an inclination to the first main flow direction; wherein a leading edge area of each vane has a profile, which is oriented parallel to a second main flow direction prevailing at a leading edge position, and wherein the profiles of the vanes turn from the second main flow direction prevailing at the leading edge position to impose a swirl on the flow, wherein, with reference to a central plane of the vanes, trailing edges are provided with at least two lobes alternatingly extending out of the central plane in opposite transverse directions;wherein a traverse deflection from the central plane of two adjacent vanes, which form the lobes, are inverted, and a transition from a planar leading edge region to the deflections is smooth with a surface curvature representing a function with a continuous first derivative, wherein the annular housing extends with a central axis aligned with the first main flow direction having the inlet area and the outlet area normal to the central axis to form an axial swirler. 3. A swirler, comprising: an annular housing with limiting walls having an inlet area, and an outlet area in a first main flow direction prevailing in the swirler;at least two vanes, arranged in the annular housing, each vane having a streamlined cross-sectional profile, which extends with a longitudinal direction perpendicularly or at an inclination to the first main flow direction; wherein a leading edge area of each vane has a profile, which is oriented parallel to a second main flow direction prevailing at a leading edge position, and wherein the profiles of the vanes turn from the second main flow direction prevailing at the leading edge position to impose a swirl on the flow, wherein, with reference to a central plane of the vanes, trailing edges are provided with at least two lobes alternatingly extending out of the central plane in opposite transverse directions;wherein a traverse deflection from the central plane of two adjacent vanes, which form the lobes, are inverted, and a transition from a planar leading edge region to the deflections is smooth with a surface curvature representing a function with a continuous first derivative;wherein a lobe height and/or the periodicity (λ) is a function of a radial distance of the lobe to a center axis of the swirler along the trailing edge of each vane and/or proportional to the radial distance of the lobe to the center axis of the swirler along the trailing edge of each vane. 4. A swirler, comprising: an annular housing with limiting walls having an inlet area, and an outlet area in a first main flow direction prevailing in the swirler;at least two vanes, arranged in the annular housing, each vane having a streamlined cross-sectional profile, which extends with a longitudinal direction perpendicularly or at an inclination to the first main flow direction; wherein a leading edge area of each vane has a profile, which is oriented parallel to a second main flow direction prevailing at a leading edge position, and wherein the profiles of the vanes turn from the second main flow direction prevailing at the leading edge position to impose a swirl on the flow, wherein, with reference to a central plane of the vanes, trailing edges are provided with at least two lobes alternatingly extending out of the central plane in opposite transverse directions; wherein a traverse deflection from the central plane of two adjacent vanes, which form the lobes, are inverted, and a transition from a planar leading edge region to the deflections is smooth with a surface curvature representing a function with a continuous first derivative; wherein the inlet area and the outlet area are concentric and the annular housing extends with a central axis normal to the first main flow direction to form a radial swirler. 5. A method for operating a burner for a combustion chamber of a gas turbine, the burner including a swirler having an annular housing with limiting walls having an inlet area, and an outlet area in a first main flow direction prevailing in the swirler; at least two vanes, arranged in the annular housing, each vane having a streamlined cross-sectional profile, which extends with a longitudinal direction perpendicularly or at an inclination to the first main flow direction, wherein a leading edge area of each vane has a profile, which is oriented parallel to a second main flow direction prevailing at a leading edge position, and wherein the profiles of the vanes turn from the second main flow direction prevailing at the leading edge position to impose a swirl on the flow, wherein, with reference to a central plane of the vanes, trailing edges are provided with at least two lobes alternatingly extending out of the central plane in opposite transverse directions, wherein at least one of the vanes is arranged as at least one of an injection device comprising at least one nozzle for introducing at least one fuel into the burner, at least one injection device with at least one nozzle for introducing at least one fuel into the burner provided upstream of the vanes, and at least one nozzle for introducing at least one fuel into the burner provided at the inner limiting wall and/or the outer limiting wall, the method comprising: determining the number of fuel injection nozzles through which fuel is injected as a function of the total injected fuel flow wherein the fuel nozzles are circular and/or are elongated slot nozzles extending along the trailing edge of the vane and/or comprise a first nozzle for injection of liquid fuel, and/or a second nozzle for injection of a gaseous fuel and a third nozzle for injection of carrier air, which encloses the first nozzle and/or the second nozzle;below threshold fuel flows, fuel is only injected through every second or third fuel nozzle of a vane and/or only injected through the fuel nozzles of every second or third vane of the burner;injecting high reactivity fuel through the trailing edge of the vanes; andinjecting low reactivity fuel through an injection device for introducing at least one fuel into the burner, which is provided upstream of the vanes and/or at least one nozzle for introducing at least one fuel into the burner, which is provided at the inner limiting wall and/or the outer limiting wall and/or through an injection device for introducing at least one fuel into the burner, which is provided at the surfaces of the vanes upstream of the trailing edge.
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이 특허에 인용된 특허 (13)
Presz ; Jr. Walter M. (Wilbraham MA) Paterson Robert W. (Simsbury CT) Werle Michael J. (Hartford CT), Airfoil-shaped body.
Prade, Bernd, Local improvement of the mixture of air and fuel in burners comprising swirl generators having blade ends that are crossed in the outer region.
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