Assembly for directing combustion gas

Patent metadata

Field	Value
Publication number	US-9309774-B2
Application number	US-201414155406-A
Country	US
Kind code	B2
Filing date	Jan 15, 2014
Priority date	Jan 15, 2014
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

An arrangement is provided for delivering gases from a plurality of combustors of a can-annular gas turbine combustion engine to a first row of turbine blades including a first row of turbine blades. The arrangement includes a gas path cylinder, a cone and an integrated exit piece (IEP) for each combustor. Each IEP comprises an inlet chamber for receiving a gas flow from a respective combustor, and includes a connection segment. The IEPs are connected together to define an annular chamber extending circumferentially and concentric to an engine longitudinal axis, for delivering the gas flow to the first row of blades. A radiused joint extends radially inward from a radially outer side of the inlet chamber to an outer boundary of the annular chamber, and a flared fillet extends radially inward from a radially inner side of the inlet chamber to an inner boundary of the annular chamber.

First claim

What is claimed is:

1. An arrangement for delivering gases from a plurality of combustors of a can-annular gas turbine combustion engine to a first row of turbine blades, the arrangement comprising a gas path cylinder, a cone, and an integrated exit piece (IEP) for each combustor, wherein each IEP comprises a straight path portion for receiving a gas flow from a respective combustor via the cylinder and cone, and the IEP further includes a connection segment, wherein each IEP connects to an adjacent IEP at the connection segment of the adjacent IEP, and the connected IEPs define an annular chamber that extends circumferentially and is oriented concentric to a gas turbine engine longitudinal axis, for delivering the gas flow to the first row of blades; wherein gases flow from respective combustors, through respective straight path portions, and into the annular chamber;
wherein each straight path portion comprises four side walls forming a closed polygonal cross section at an inlet end of the straight path portion, adjacent pairs of side walls being connected by radiused joints, defined by four radiused joints extending from an upstream location toward an exit end of the IEP, at least two of the joints having a constant radius from the upstream location to the exit end and at least one of the joints having a radius that is greater than the radii of the at least two joints;
wherein the four side walls of the straight path portion are defined by a radially outer side wall opposite to a radially inner side wall, and the radially outer and inner side walls are coupled together with opposed forward and aft side walls, and the forward side wall defines a continuous side wall from an upstream end of the straight path portion to the exit end of the IEP;
wherein the inner side wall is bounded by forward and aft longitudinal edges extending in the direction of a flow axis for the straight path portion, the connection segment includes a connection segment forward wall extending circumferentially from an upstream location to a downstream edge, and including a flared fillet, having longitudinal edges that diverge in a downstream flow direction, extending from the aft longitudinal edge of the inner side wall to the downstream edge of the connection segment forward wall.

2. The arrangement of claim 1 , wherein the outer side wall is bounded by forward and aft longitudinal edges extending in the direction of a flow axis for the straight path portion, the aft side wall is bounded by inner and outer aft wall edges, the outer aft wall edge extending in the direction of the flow axis parallel to the aft longitudinal edge of the outer side wall, wherein the at least one joint is defined by a joint panel extending between the aft longitudinal edge of the outer side wall and the outer aft wall edge of the aft side wall.

3. The arrangement of claim 2 , wherein a width of the joint panel, from the aft longitudinal edge to the outer aft wall edge, is at least as great as a width of the outer side wall, from the forward longitudinal edge to the aft longitudinal edge.

4. The arrangement of claim 1 , wherein the IEP includes a transition segment forming an interface section between the upstream end of the straight path portion and a cone connected to an upstream end of the IEP.

5. The arrangement of claim 1 , wherein the straight path portion is open to the annular camber along a common plane beginning at a convergence flow junction (CFJ), and the flared fillet has an apex at the CFJ and has opposing edges that diverge from the CFJ.

6. The arrangement of claim 5 , wherein the aft longitudinal edge of the inner side wall converges toward the forward longitudinal edge of the inner side wall, extending from the CFJ toward the exit end of the IEP.

7. The arrangement of claim 1 , wherein the connection segment includes an outer circumferentially curved triangular panel extending downstream at a radial outer edge of the connection segment forward wall, and includes an inner circumferentially curved triangular panel extending downstream at a radial inner edge of the connection segment forward wall, and wherein upstream edges of the outer and inner circumferentially curved triangular panels form junctions with respective downstream edges of outer and inner side walls of an upstream adjacent flow directing structure.

8. An arrangement for conveying combustion gas from a plurality of can-annular combustors of a gas turbine combustion engine to a first row of turbine blades, the arrangement comprising:
a plurality of gas path cylinders, cones and interconnected integrated exit piece (IEP) sections, the IEPs defining an annular chamber for delivering a gas flow to the first row of turbine blades, the annular chamber being oriented concentric to a gas turbine engine longitudinal axis upstream of the first row of blades;
each respective IEP comprising an inlet chamber defining a first flow path receiving a first flow from a respective cone along a respective common axis therebetween, the inlet chamber including:
a planar inlet chamber outer side wall bounded by forward and aft outer longitudinal edges extending in the direction of the common axis;
a planar inlet chamber inner side wall opposing the outer side wall and bounded by forward and aft inner longitudinal edges extending in the direction of the common axis;
opposing planar inlet chamber forward and aft side walls extending between the inlet chamber outer and inner side walls; and
the inlet chamber outer side wall connected to the inlet chamber forward and aft side walls at respective radially outer forward and aft outer radius portions, and the inlet chamber inner side wall connected to the inlet chamber forward side wall at a radially inner forward radius portion;

a connection segment defining a second flow path receiving a partially bounded second flow from an upstream adjacent IEP and delivering at least part of the second flow to the first row of blades, the connection segment including:
a planar connection segment forward wall; and
connection segment outer and inner walls connected to and extending aft from the connection segment forward wall;

the inlet chamber inner side wall connected to the connection segment forward wall by a flared fillet having longitudinal edges that diverge in a downstream flow direction.

9. The arrangement of claim 8 , wherein one of the longitudinal edges of the flared fillet coincides with the aft longitudinal edge of the inlet chamber inner side wall.

10. The arrangement of claim 9 , wherein the forward and aft longitudinal edges of the inlet chamber inner side wall converge extending from an inlet end toward an outlet end of the inlet chamber.

11. The arrangement of claim 8 , wherein the longitudinal edges of the flared fillet are defined by forward and aft longitudinal edges, and the flared fillet angles radially inward from the forward longitudinal edge to the aft longitudinal edge.

12. The arrangement of claim 8 , wherein the connection segment outer and inner walls comprise respective outer and inner circumferentially curved triangular panels extending downstream, and wherein upstream edges of the outer and inner circumferentially curved triangular panels form junctions with respective downstream edges of inlet chamber outer and inner side walls of an upstream adjacent IEP.

13. The arrangement of claim 8 , wherein the aft outer radius portion is defined by a joint panel having a span extending between the aft longitudinal edge of the inlet chamber outer side wall and an outer edge of the aft side wall.

14. The arrangement of claim 13 , wherein the span of the joint panel angles radiall

Assignees

• Siemens Energy Inc

Inventors

• Charron Richard C
• Little David A
• Snyder Gary D

Classifications

• F23R3/60

  Support structures; Attaching or mounting means · CPC title

• F01D9/023 Primary

  Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings · CPC title

• F02C3/14

  characterised by the arrangement of the combustion chamber in the plant (combustion chambers per se F23R; F02C3/205 takes precedence) · CPC title

• F01D9/047 Primary

  Nozzle boxes · CPC title

• F23R3/50

  Combustion chambers comprising an annular flame tube within an annular casing (toroidal combustion chambers F23R3/52) · CPC title