US 11,054,137 B2
Co-axial dual swirler nozzle
Jung Jin Choi, Changwon-si (KR)
Filed by DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD., Changwon-si (KR)
Filed on Jul. 22, 2018, as Appl. No. 16/41,826.
Claims priority of provisional application 62/582,228, filed on Nov. 6, 2017.
Prior Publication US 2019/0137103 A1, May 9, 2019
Int. Cl. F23R 3/14 (2006.01); F02C 3/14 (2006.01); F23R 3/28 (2006.01); F23R 3/16 (2006.01)
CPC F23R 3/14 (2013.01) [F02C 3/14 (2013.01); F23R 3/16 (2013.01); F23R 3/286 (2013.01); F05D 2240/35 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A combustion nozzle of a gas turbine, comprising:
a center cylinder formed by a sidewall of a cylinder shape having a first length in an axial direction, the first length measured from an imaginary plane disposed at an upstream end of the combustion nozzle, the imaginary plane passing perpendicularly through a cylinder axis of the center cylinder, the center cylinder having one end disposed at the imaginary plane;
a middle cylinder coaxially disposed with respect to the center cylinder and formed by a sidewall of a cylinder shape having a second length in the axial direction, the middle cylinder having one end disposed at the imaginary plane and surrounding the center cylinder, the second length measured from the imaginary plane;
an outer cylinder coaxially disposed with respect to the middle cylinder and formed by a sidewall of a cylinder shape having a third length in the axial direction, the outer cylinder having one end disposed at the imaginary plane and surrounding the middle cylinder, the third length measured from the imaginary plane; and
a perforated plate disposed inside the center cylinder to create turbulent flow through the center cylinder, the perforated plate including a circular plate having a disc shape that passes through the cylinder axis of the center cylinder and abuts the sidewall of the center cylinder on opposite sides of the cylinder axis of the center cylinder, the perforated plate having a plurality of holes to create the turbulent flow,
wherein a ratio of an area of the plurality of holes to an area of the perforated plate has a value of 60% to 80%,
wherein the middle cylinder creates two separate flow regions outside the center cylinder, and
wherein the second length is greater than the first length.
 
21. A combustion nozzle of a gas turbine, comprising:
a center cylinder formed by a sidewall of a cylinder shape having a first length in an axial direction, the first length measured from an imaginary plane disposed at an upstream end of the combustion nozzle, the imaginary plane passing perpendicularly through a cylinder axis of the center cylinder, the center cylinder having one end disposed at the imaginary plane;
a middle cylinder coaxially disposed with respect to the center cylinder and formed by a sidewall of a cylinder shape having a second length in the axial direction, the middle cylinder having one end disposed at the imaginary plane and surrounding the center cylinder, the second length measured from the imaginary plane;
an outer cylinder coaxially disposed with respect to the middle cylinder and formed by a sidewall of a cylinder shape having a third length in the axial direction, the outer cylinder having one end disposed at the imaginary plane and surrounding the middle cylinder, the third length measured from the imaginary plane;
a perforated plate disposed inside the center cylinder to create turbulent flow through the center cylinder, the perforated plate including a circular plate having a disc shape that passes through the cylinder axis of the center cylinder and abuts the sidewall of the center cylinder on opposite sides of the cylinder axis of the center cylinder;
inner vanes disposed between the center cylinder and the middle cylinder; and
outer vanes disposed between the middle cylinder and the outer cylinder,
wherein the inner vanes and the outer vanes have a leading edge,
wherein the middle cylinder creates two separate flow regions outside the center cylinder, and
wherein the second length is greater than the first length.