Burner, combustor, and gas turbine
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsMasahiro Ogata, Takeo Oda, Yasuhiro Kinoshita, Kohshi Hirano, Takahiro Uto
Life of this patent
Estimating the term…
Abstract
A burner injects a mixture of fuel and air from a base end side far from a combustion chamber toward a distal end side close to the combustion chamber. The burner has a fuel passage having a turn-back part turning back and channeling the fuel between the base end side and the distal end side. The burner has a premixed gas passage formed to surround the fuel passage. The burner has a fuel introduction part introducing the fuel channeled through the fuel passage into the premixed gas passage from the base end side to the distal end side. The burner has an air supply part supplying the premixed gas passage with air on the base end side.
Claims13
A combustor configured to supply a combustion product gas to a turbine, the combustor comprising:
- a combustion cylinder forming a combustion chamber configured to combust a fuel;
- a premixed combustion main burner disposed upstream of the combustion cylinder;
- and
- a premixed combustion supplemental burner extending through a circumferential wall portion of the combustion cylinder downstream from the premixed combustion main burner, wherein
- the premixed combustion supplemental burner is configured to inject a mixture of the fuel and air from a base end of the premixed combustion supplemental burner toward a distal end of the premixed combustion supplemental burner and into the combustion chamber, the distal end configured to be positioned within the combustion chamber, the base end configured to be positioned further from the combustion chamber than the distal end, the premixed combustion supplemental burner comprising:
- a fuel passage configured to channel the fuel between the base end and the distal end, the fuel passage comprising a first fuel passage portion and a second fuel passage portion, the first fuel passage portion being configured to channel fuel from the base end along a first direction towards the distal end to a turn-back part, the second fuel passage portion configured to receive the fuel from the turn-back part and channel the fuel from the turn-back part along a second direction towards the base end, the turn-back part configured to turn back the fuel from the first direction to the second direction;
- a premixed gas passage surrounding the fuel passage and configured to communicate with the combustion chamber;
- a fuel introduction part positioned closer than the premixed gas passage to the base end, the fuel introduction part configured to receive the fuel from the fuel passage and introduce the fuel into the premixed gas passage along the first direction;
- and
- an air supply part positioned at the first end of the premixed gas passage and configured to supply the premixed gas passage with air.
A burner configured to inject a mixture of fuel and air from a base end of the burner toward a distal end of the burner and into a combustion chamber, the distal end configured to be positioned within the combustion chamber, the base end configured to be positioned further from the combustion chamber than the distal end, the burner comprising:
- a fuel passage configured to channel the fuel between the base end and the distal end, the fuel passage comprising a first fuel passage portion and a second fuel passage portion, the first fuel passage portion being configured to channel fuel from the base end along a first direction towards the distal end to a turn-back part, the second fuel passage portion configured to receive the fuel from the turn-back part and channel the fuel from the turn-back part along a second direction towards the base end, the turn-back part configured to turn back the fuel from the first direction to the second direction;
- a premixed gas passage surrounding the fuel passage and configured to communicate with the combustion chamber, the premixed gas passage extending from a first end of the premixed gas passage to a second end of the premixed gas passage positioned at the distal end of the burner;
- a fuel introduction part positioned closer than the premixed gas passage to the base end, the fuel introduction part configured to receive the fuel from the fuel passage and introduce the fuel into the premixed gas passage along the first direction;
- and
- an air supply part positioned at the first end of the premixed gas passage and configured to supply the premixed gas passage with air, wherein
- the fuel passage has at least one first communication aperture configured to communicate between the first portion of the fuel passage and the second portion of the fuel passage, the at least one first communication aperture being positioned upstream of the turn-back part with respect to a flow of the fuel along the first direction in the first portion of the fuel passage,
- the fuel introduction part includes a coupling chamber and a plurality of injection holes, the coupling chamber configured to receive the fuel from the second portion of the fuel passage, and the plurality of injection holes are configured to inject the fuel from the coupling chamber into the premixed gas passage, and
- the at least one first communication aperture is located downstream of the coupling chamber with respect to the flow of the fuel along the first direction in the first portion of the fuel passage.
Dependencies are inferred from the claim text.