US 9,791,149 B2Granted

Gas turbine combustor

AssigneeMitsubishi Hitachi Power Systems, Ltd.

InventorsKei Inoue, Keijiro Saito, Yoshikazu Matsumura, Sosuke Nakamura

Life of this patent

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Abstract

Provided is a gas turbine combustor capable of reducing the size of a low-temperature air layer of pilot air formed between a pilot flame and a premixed flame and of improving the flame stability of the premixed flame. A gas turbine combustor, which is provided with a pilot burner that is provided at the center portion of a combustor main body formed in a cylindrical shape to form a pilot flame, and a plurality of main burners arranged so as to surround the outer periphery of the pilot burner to form a premixed flame, includes, as the ignition improving part, a channel blocking member that reduces the size of the low-temperature air layer of the pilot air formed between the pilot flame and the premixed flame.

Claims1

Dependent claims

A gas turbine combustor provided with a pilot burner that is provided at a center portion of a combustor main body formed in a cylindrical shape to form a pilot flame, and a plurality of main burners arranged so as to surround an outer periphery of the pilot burner to form a premixed flame, the gas turbine combustor comprising:

an ignition improving part that reduces the size of a low-temperature air layer of pilot air, formed between the pilot flame and the premixed flame,
wherein in the ignition improving part is one or a plurality of plate-like projecting members projecting in a downstream direction of a flow of the pilot air and attached to an outer edge of a pilot cone, and
the one or the plurality of the plate-like projecting members are configured in a shape of a part of a cylinder and extend downstream in an axial direction of the pilot cone, and are provided at a portion in a circumferential direction of the outer edge of the pilot cone.

Dependencies are inferred from the claim text.

Facts

Application: 14/317,357Filed 27 Jun 2014 · division
Priority: JP 2007-32995521 Dec 2007
Published: US 2014/0305094 A116 Oct 2014
Granted: 17 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F23D 14/70
Details: baffles or like flow-disturbing devices
F23R 3/286
Characterised by the fuel supply: having fuel-air premixing devices
F23R 3/343
Feeding into different combustion zones: pilot flames, i.e. fuel nozzles or injectors using only a very small proportion of the total fuel to…
F23D
Burners

Family

PCT/JP2008/073177Parent of this division · filed 19 Dec 2008
US 2014/0305094 A1Pre-grant publication · published 16 Oct 2014
Application12/666,673Parent of this division
US 8,794,004 B2Parent of this division
US 2010/0319351 A1Published application
US 9,791,149 B2This patent

From the US filing history. Foreign family members aren’t listed.