公开(公告)号：US20160010856A1

公开(公告)日：2016-01-14

申请号：US14793775

申请日：2015-07-08

Applicant: ALSTOM Technology Ltd

Inventor： Fernando BIAGIOLI ,  Madhavan Narasimhan POYYAPAKKAM ,  Stefan WYSOCKI

IPC: F23D14/02 ,  F23R3/14

CPC classification number: F23D14/02 ,  F23C2900/07001 ,  F23D14/24 ,  F23R3/14

Abstract: The present invention relates to an axial swirler, in particular for premixing of oxidizer and fuel in gas turbines. The axial swirler for a gas turbine burner includes a plurality of swirl vanes with a streamline cross-section being arranged around a swirler axis and extending in radial direction between an inner radius Rmin and an outer radius Rmax. Each swirl vane has a leading edge, a trailing edge, and a suction side and a pressure side extending each between the leading and trailing edges. A discharge flow angle a between a tangent to the swirl vane camber line at its trailing edge and the swirler axis is first function of radial distance R from the swirler axis. A position of maximum camber of the swirl vane is second function of radial distance R from the swirler axis. At least one swirl vane of the first and second functions include each a respective local maximum and local minimum values along said radial distance from Rmin to Rmax. The invention also relates to a burner with such a swirler.

Abstract translation: 本发明涉及一种轴向旋流器，特别是用于燃气轮机中氧化剂和燃料的预混合。 用于燃气涡轮燃烧器的轴向旋流器包括多个旋流叶片，其流线横截面围绕旋流器轴线布置并且在径向方向上在内半径Rmin和外半径Rmax之间延伸。 每个旋流叶片具有前缘，后缘以及每个在前缘和后缘之间延伸的吸力侧和压力侧。 在其后缘处的旋流叶片弯曲线的切线与旋流器轴线之间的排出流量角度α是来自旋流器轴线的径向距离R的函数。 涡流叶片的最大弯度的位置是来自旋流器轴线的径向距离R的第二函数。 第一和第二功能的至少一个旋流叶片包括沿着从Rmin到Rmax的所述径向距离的各自的局部最大值和局部最小值。 本发明还涉及具有这种旋流器的燃烧器。

公开(公告)号：US20150300646A1

公开(公告)日：2015-10-22

申请号：US14685945

申请日：2015-04-14

Applicant: ALSTOM Technology Ltd

Inventor： Fernando BIAGIOLI ,  Madhavan Narasimhan Poyyapakkam

IPC: F23R3/14 ,  F23R3/28

CPC classification number: F23R3/14 ,  F23C7/004 ,  F23C2900/07001 ,  F23D2900/14021 ,  F23D2900/14701 ,  F23R3/286

Abstract: A method for premixing air with a gaseous fuel for being burned in a combustion chamber includes: guiding the air in an air stream along a burner axis through a coaxial air tube into a combustion chamber arranged at an end of said air tube; and impressing a swirl on the air stream by passing it through a first swirl device concentrically arranged within the air tube and comprising a plurality of radially oriented first blades. The method further includes: injecting gaseous fuel into the air stream at the first swirl device; and mixing said air in said air stream with the injected gaseous fuel in a first mixing zone arranged just after said first swirl device

Abstract translation: 用于将空气与用于在燃烧室中燃烧的气体燃料预混合的方法包括：沿着燃烧器轴线的空气流中的空气通过同轴空气管引导到布置在所述空气管的端部的燃烧室中; 并且通过使其通过同心地布置在所述空气管内并包括多个径向取向的第一叶片的第一旋流装置来在所述空气流上施加漩涡。 该方法还包括：在第一涡流装置处将气体燃料喷射到空气流中; 以及将所述空气流中的空气与喷射的气体燃料混合在刚刚在所述第一涡流装置之后布置的第一混合区域中

公开(公告)号：US20140123661A1

公开(公告)日：2014-05-08

申请号：US14072170

申请日：2013-11-05

Applicant: ALSTOM Technology Ltd

Inventor： Fernando BIAGIOLI ,  Madhavan Narasimhan POYYAPAKKAM ,  Riccardo CENNI ,  Khawar SYED

IPC: F23R3/14

CPC classification number: F23R3/14 ,  F23C7/004 ,  F23D2900/14021 ,  F23R3/286 ,  F23R3/36

Abstract: An axial swirler, in particular for premixing of oxidizer and fuel in gas turbines, includes a series of swirl vanes with a streamline cross-section. Each swirl vane has a leading edge, a trailing edge, and a suction side and a pressure side extending each between the leading and trailing edges. The swirl vanes are arranged around a swirler axis, wherein the leading edges extend essentially in radial direction. Flow slots are formed between the suction side of each swirl vane and the pressure side of its nearest neighboring swirl vane. Furthermore, at least one swirl vane has a discharge flow angle between a tangent to its camber line at its trailing edge and the swirler axis that is monotonically increasing with increasing radial distance from the swirler axis. The invention also relates to a burner with such a swirler and a method of operating the burner.

Abstract translation: 特别是用于燃气轮机中氧化剂和燃料的预混合的轴向旋流器包括具有流线横截面的一系列旋流叶片。 每个旋流叶片具有前缘，后缘以及每个在前缘和后缘之间延伸的吸力侧和压力侧。 涡旋叶片围绕旋流器轴线布置，其中前缘基本上沿径向延伸。 流动槽形成在每个涡流叶片的吸力侧和其最近的相邻旋流叶片的压力侧之间。 此外，至少一个旋流叶片具有在其后缘处的其弯曲线的切线与旋流器轴线之间的排出流动角度，该旋流器轴线随着距旋流器轴线的径向距离的增加而单调增加。 本发明还涉及具有这种旋流器的燃烧器和操作燃烧器的方法。

公开(公告)号：US20140013764A1

公开(公告)日：2014-01-16

申请号：US13937482

申请日：2013-07-09

Applicant: ALSTOM Technology Ltd

Inventor： Fernando BIAGIOLI ,  Naresh ALURI ,  Madhavan Narasimhan POYYAPAKKAM ,  Jan CERNY

IPC: F23R3/14

CPC classification number: F23R3/14 ,  F23C7/004 ,  F23R3/286

Abstract: An axial swirler for a gas turbine burner includes a vane ring with a plurality of swirler vanes circumferentially distributed around a swirler axis. Each of the swirler vanes includes a trailing edge. In order to achieve a controlled distribution of the exit flow velocity profile and/or the fuel equivalence ratio in the radial direction. The trailing edge is discontinuous with the trailing edge having a discontinuity at a predetermined radius.

Abstract translation: 用于燃气涡轮燃烧器的轴向旋流器包括具有围绕旋流器轴线周向分布的多个旋流器叶片的叶片环。 每个旋流器叶片包括后缘。 为了实现径向方向上的出口流速分布和/或燃料当量比的受控分布。 后缘是不连续的，后缘具有预定半径的不连续性。