US 11,815,026 B2
Combustor nozzle, and combustor and gas turbine including the same
Borys Shershnyov, Changwon (KR); and Mu Hwan Chon, Changwon (KR)
Assigned to DOOSAN ENERBILITY CO., LTD., Changwon (KR)
Filed by DOOSAN ENERBILITY CO., LTD, Changwon-si (KR)
Filed on Jul. 5, 2021, as Appl. No. 17/367,440.
Claims priority of application No. 10-2020-0082980 (KR), filed on Jul. 6, 2020.
Prior Publication US 2022/0003167 A1, Jan. 6, 2022
Int. Cl. F02C 7/00 (2006.01); F02C 7/232 (2006.01); F23R 3/28 (2006.01)
CPC F02C 7/232 (2013.01) [F23R 3/28 (2013.01); F05D 2220/32 (2013.01); F05D 2240/36 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A combustor nozzle comprising:
a main cylinder;
a nozzle shroud surrounding the main cylinder; and
a fuel injection module disposed between the main cylinder and the nozzle shroud to inject fuel,
wherein the fuel injection module comprises:
a plurality of first struts protruding from the main cylinder and having strut injection holes to inject the fuel,
a first support tube coupled to outer ends of the first struts, and
a plurality of second struts protruding from the first support tube and having strut injection holes to inject the fuel, and
wherein each of the first and second struts comprises a swirl guide inclined with respect to a longitudinal direction of the main cylinder, the swirl guide for each first strut being inclined by a first angle and the swirl guide for each second strut being inclined by a second angle with respect to the longitudinal direction of the main cylinder,
wherein the first angle and the second angle are larger than 0 degrees and smaller than 90 degrees and the first angle is different from the second angle,
wherein the main cylinder comprises an inner tube and an outer tube surrounding the inner tube, and a plurality of pegs for injecting the fuel to guide a flow of air and mixing bars for mixing the air and the fuel injected from the pegs are installed between the inner tube and the outer tube, each of the mixing bars being twisted,
wherein each mixing bar comprises a twisted part and a first flat part fixed to a downstream end of the twisted part, and the twisted part has an upstream end fixed to a downstream end of an associated one of the plurality of pegs,
wherein the twisted part of each mixing bar comprises a first section rotated by 180 degrees and a second section positioned downstream of the first section and rotated by 180 degrees, the second section having a greater length than the first section, and
wherein upstream and downstream directions are in reference to the flow of the air through the main cylinder.