EP0643267A1 - Premixed gas burning method and combustor - Google Patents

Premixed gas burning method and combustor Download PDF

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Publication number
EP0643267A1
EP0643267A1 EP94908507A EP94908507A EP0643267A1 EP 0643267 A1 EP0643267 A1 EP 0643267A1 EP 94908507 A EP94908507 A EP 94908507A EP 94908507 A EP94908507 A EP 94908507A EP 0643267 A1 EP0643267 A1 EP 0643267A1
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EP
European Patent Office
Prior art keywords
premixed gas
combustion
gas
fuel
combustor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94908507A
Other languages
German (de)
French (fr)
Other versions
EP0643267A4 (en
EP0643267B1 (en
Inventor
Shigemi Takasago Mach. Works Mitsubishi Mandai
Katsunori Takasago Mach. Works Mitsubishi Tanaka
Nobuo Takasago Research & Development Ctr. Sato
Satoshi Takasago Res. & Dev. Ctr. Tanimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0643267A1 publication Critical patent/EP0643267A1/en
Publication of EP0643267A4 publication Critical patent/EP0643267A4/en
Application granted granted Critical
Publication of EP0643267B1 publication Critical patent/EP0643267B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/002—Supplying water
    • F23L7/005—Evaporated water; Steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
    • F23R3/04—Air inlet arrangements
    • F23R3/10—Air inlet arrangements for primary air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2210/00—Noise abatement

Definitions

  • This invention relates to a method for the combustion of a premixed gas in a combustor having a fuel-air premixing nozzle and useful for effecting low-NO x combustion and a combustor therefor.
  • This invention can be applied to such combustors as gas turbine combustors, boilers, and furnaces for use in chemical industry.
  • FIG. 3 illustrates a part of a burner based on the conventional method for the combustion of a premixed gas.
  • reference numeral 1 designates a premixing nozzle
  • 2 designates a premixed gas
  • 3 designates a flame holder
  • 4 designates a flame
  • 5 designates a circulating or staying hot gas
  • 6 designates a pilot nozzle
  • 7 designates a pilot fuel.
  • the premixed gas 2 injected through the premixing nozzle 1 into the combustion chamber burns so as to go round the flame holder 3, thus forming downstream a circulating hot gas 5 serving for flame holding.
  • the combustion rate of the premixed gas i.e., the velocity at which the flame advances into the unburned mixture
  • the fuel concentration may cause marked variation in the resulting combustion rate.
  • variation in combustion rate causes variation in flame length and may eventually lead to the development of combustive vibration.
  • the present invention has been made for the purpose of solving the above-described problem and has for its object the provision of a method and combustor for the combustion of a premixed gas which can minimize the development of combustive vibration due to variation in the fuel concentration of the premixed gas.
  • the present invention provides:
  • a neutral fluid is fed between the premixed gas layer and the hot gas, so that a flame is not propagated directly from the hot gas to the premixed gas. Instead, a mid-temperature gas is generated by the mixing and diffusion of the hot gas and the neutral fluid. Thereafter, the premixed gas is burned as a result of the mixing and diffusion of the mid-temperature gas and the premixed gas.
  • the mechanism by which the premixed gas is burned is such that the hot gas and the premixed gas intermingle with each other, during this process the premixed gas is heated by the heat transferred from the hot gas, and combustion is initiated when the combustion starting temperature is reached.
  • the premixed gas is burned under mixing and diffusion rate control, as contrasted with an ordinary premixed flame in which combustion is effected by flame propagation. Consequently, it is possible to achieve combustion which is little affected by the fuel concentration of the premixed gas.
  • diffusion means that the hot gas and the premixed gas intermingle with each other
  • rate control means the controlling of the rate of such diffusion.
  • Diffusion rate control means the controlling of the rate at which the hot gas and the premixed gas intermingle with each other.
  • the flame temperature in this mixing region is low and the production of NO x in this region is minimized.
  • the premixed gas is burned under diffusion rate control, the main flame is long, and heat generation or heat generation quotient can be spread in space, so that combustive vibration can be prevented.
  • the reason why combustive vibration can be prevented is that the combustion pressure is reduced by dispersion of the heat generation and, moreover, the variation of flame length relative to the total flame length becomes smaller as a result of the prolongation of the flame.
  • heat generation quotient means the per area combustion (dQ/dx) of fuel (Q) with respect to the axial distance (x) of a combustor.
  • FIG. 1 illustrates an exemplary burner for carrying out the method of the present invention.
  • the same elements as shown in FIG. 3 are designated by the same reference numerals and no detailed explanation thereof is given.
  • a passage for feeding a neutral fluid 8 is formed between a premixing nozzle 1 and a pilot nozzle 6.
  • the orifice for injecting the neutral fluid 8 into the combustion chamber is configured so as to cause the neutral fluid 8 to flow out along the inner wall surface of a flame holder 3.
  • the neutral fluid 8 is a fluid containing no fuel and may comprise, for example, air, exhaust gas, steam or the like.
  • a neutral fluid is fed between a layer of a premixed gas 2 injected through the premixing nozzle 1 and a circulating hot gas 5, so that the premixed gas 2 injected through the premixing nozzle 1 does not come into direct contact with the hot gas 5.
  • the neutral fluid 8 is first mixed with the hot gas 5 to generate a mid-temperature gas. Then, in a downward region, this mid-temperature gas is mixed with the premixed gas 2 to form a flame 4.
  • the premixed gas 2 separated from the hot gas 5 by the neutral fluid 8 can be burned under diffusion rate control, so that a long main flame results. This means that the heat generation quotient can be spatially spread and small to prevent combustive vibration.
  • FIG. 2 is a graph showing the states of combustive vibration when combustion was effected in a burner using air as the neutral fluid 8 according to the method of the present invention and in a conventional burner.
  • the ordinate shows the internal pressure fluctuation of the combustor which serves as a measure of combustive vibration
  • the abscissa shows the proportion of the pilot fuel (i.e., the pilot fuel 7 for the formation of a diffusion flame) to the total fuel (i.e., the main fuel plus the pilot fuel).
  • FIG. 2 indicates that, regardless of the proportion of the pilot fuel, the internal pressure fluctuation ratio is lower in the presence of a neutral fluid (the present invention) than in the absence of a neutral fluid (the prior art). That is, FIG. 2 indicates less combustive vibration in the presence of a neutral fluid, demonstrating the effects of the present invention.
  • the present invention is not limited to the burner design illustrated in FIG. 1, but comprehends all combustors involving the formation of a circulating flow wherein a neutral fluid is fed between the circulating flow and the premixed gas.
  • the present invention can be applied to combustors having various flame-holding plates and combustors forming a circulating flow or a stagnation point in a region having an abruptly expanded flow path.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

This invention aims at eliminating from a fuel-air premixing nozzle-carrying combustor the inconveniences, such as variation of flame length which is ascribed to variation of combustion rate due to variation of fuel concentration in a premixed gas; and the occurrence of combustion vibration. The present invention provides a combustion method in which a non-fuel-containing fluid (8) is supplied to a space between a premixed gas layer (2) formed by a premixed gas ejected from a premixing nozzle (1) and a high-temperature gas layer (5) formed by a part of a high temperature gas occurring due to the combustion of the premixed gas, which part of the high-temperature gas is circulated or reside in a downstream zone at an outlet portion of the premixing nozzle; and a combustor.

Description

    Technical Field
  • This invention relates to a method for the combustion of a premixed gas in a combustor having a fuel-air premixing nozzle and useful for effecting low-NOx combustion and a combustor therefor. This invention can be applied to such combustors as gas turbine combustors, boilers, and furnaces for use in chemical industry.
    • Background Art
  • Recently, in order to reduce the NOx content of exhaust gas from gas turbine combustors and the like, there is commonly employed a combustion method in which fuel is premixed with combustion air and the resulting premixed gas is burned under lean combustion conditions. This method for the combustion of a premixed gas can eliminate areas having uneven fuel concentrations and also local areas burning at higher temperatures, resulting in a marked reduction in the amount of NOx produced.
  • FIG. 3 illustrates a part of a burner based on the conventional method for the combustion of a premixed gas. In this figure, reference numeral 1 designates a premixing nozzle, 2 designates a premixed gas, 3 designates a flame holder, 4 designates a flame, 5 designates a circulating or staying hot gas, 6 designates a pilot nozzle, and 7 designates a pilot fuel.
  • The premixed gas 2 injected through the premixing nozzle 1 into the combustion chamber burns so as to go round the flame holder 3, thus forming downstream a circulating hot gas 5 serving for flame holding.
  • In this method for the combustion of a premixed gas, the combustion rate of the premixed gas (i.e., the velocity at which the flame advances into the unburned mixture) becomes higher as the temperature of the premixed gas is elevated and as the fuel concentration of the premixed gas is increased. In particular, the fuel concentration may cause marked variation in the resulting combustion rate. Such variation in combustion rate causes variation in flame length and may eventually lead to the development of combustive vibration.
    • Disclosure of the Invention
  • The present invention has been made for the purpose of solving the above-described problem and has for its object the provision of a method and combustor for the combustion of a premixed gas which can minimize the development of combustive vibration due to variation in the fuel concentration of the premixed gas.
  • In order to accomplish the above-described object, the present invention provides:
    • (1) a method for the combustion of a premixed gas in a combustor having a fuel-air premixing nozzle which comprises feeding a fluid containing no fuel between a premixed gas layer formed by injecting said premixed gas through said premixing nozzle and a hot gag layer formed from a portion of the hot gas resulting from the combustion of said premixed gas, the hot gas layer circulating or staying in a region downstream of the outlet of said premixing nozzle; and
    • (2) a combustor having a fuel-air premixing nozzle around a pilot nozzle which is characterized in that a means for feeding a fluid containing no fuel is provided between the outer periphery of the tip of said pilot nozzle and the outlet of said premixing nozzle.
  • By the above-described means, a neutral fluid is fed between the premixed gas layer and the hot gas, so that a flame is not propagated directly from the hot gas to the premixed gas. Instead, a mid-temperature gas is generated by the mixing and diffusion of the hot gas and the neutral fluid. Thereafter, the premixed gas is burned as a result of the mixing and diffusion of the mid-temperature gas and the premixed gas.
  • The mechanism by which the premixed gas is burned is such that the hot gas and the premixed gas intermingle with each other, during this process the premixed gas is heated by the heat transferred from the hot gas, and combustion is initiated when the combustion starting temperature is reached.
  • Thus, according to the present invention, the premixed gas is burned under mixing and diffusion rate control, as contrasted with an ordinary premixed flame in which combustion is effected by flame propagation. Consequently, it is possible to achieve combustion which is little affected by the fuel concentration of the premixed gas. As used herein, "diffusion" means that the hot gas and the premixed gas intermingle with each other, and "rate control" means the controlling of the rate of such diffusion. "Diffusion rate control" means the controlling of the rate at which the hot gas and the premixed gas intermingle with each other.
  • Moreover, since the hot gas and the neutral fluid are mixed to generate a mid-temperature gas which is then mixed with the premixed gas, the flame temperature in this mixing region is low and the production of NOx in this region is minimized.
  • Furthermore, since the premixed gas is burned under diffusion rate control, the main flame is long, and heat generation or heat generation quotient can be spread in space, so that combustive vibration can be prevented. The reason why combustive vibration can be prevented is that the combustion pressure is reduced by dispersion of the heat generation and, moreover, the variation of flame length relative to the total flame length becomes smaller as a result of the prolongation of the flame.
  • As used herein, "heat generation quotient" means the per area combustion (dQ/dx) of fuel (Q) with respect to the axial distance (x) of a combustor.
    • Brief Description of the Drawings
    • FIG. 1 is a schematic diagram illustrating an exemplary burner to which the present invention has been applied;
    • FIG. 2 is a graphical representation of experimental data showing the effects of the present invention; and
    • FIG. 3 is a schematic diagram illustrating a burner based on the conventional method for the combustion of a premixed gas.
    Best Mode for Carrying Out the Invention
  • FIG. 1 illustrates an exemplary burner for carrying out the method of the present invention. In this figure, the same elements as shown in FIG. 3 are designated by the same reference numerals and no detailed explanation thereof is given.
  • Referring to FIG. 1, a passage for feeding a neutral fluid 8 is formed between a premixing nozzle 1 and a pilot nozzle 6. The orifice for injecting the neutral fluid 8 into the combustion chamber is configured so as to cause the neutral fluid 8 to flow out along the inner wall surface of a flame holder 3. The neutral fluid 8 is a fluid containing no fuel and may comprise, for example, air, exhaust gas, steam or the like.
  • In the arrangement of FIG. 1, a neutral fluid is fed between a layer of a premixed gas 2 injected through the premixing nozzle 1 and a circulating hot gas 5, so that the premixed gas 2 injected through the premixing nozzle 1 does not come into direct contact with the hot gas 5. The neutral fluid 8 is first mixed with the hot gas 5 to generate a mid-temperature gas. Then, in a downward region, this mid-temperature gas is mixed with the premixed gas 2 to form a flame 4.
  • Thus, since the hot gas 5 does not come into direct contact with the premixed gas 2 fed through the premixing nozzle 1, it is unlikely that a flame is propagated directly from the hot gas 5 to the premixed gas 2 and ignites the premixed gas forcibly before the premixed gas diffuses sufficiently, as is the case with conventional burners. That is, the premixed gas 2 separated from the hot gas 5 by the neutral fluid 8 can be burned under diffusion rate control, so that a long main flame results. This means that the heat generation quotient can be spatially spread and small to prevent combustive vibration.
  • FIG. 2 is a graph showing the states of combustive vibration when combustion was effected in a burner using air as the neutral fluid 8 according to the method of the present invention and in a conventional burner. In this graph, the ordinate shows the internal pressure fluctuation of the combustor which serves as a measure of combustive vibration, and the abscissa shows the proportion of the pilot fuel (i.e., the pilot fuel 7 for the formation of a diffusion flame) to the total fuel (i.e., the main fuel plus the pilot fuel). FIG. 2 indicates that, regardless of the proportion of the pilot fuel, the internal pressure fluctuation ratio is lower in the presence of a neutral fluid (the present invention) than in the absence of a neutral fluid (the prior art). That is, FIG. 2 indicates less combustive vibration in the presence of a neutral fluid, demonstrating the effects of the present invention.
  • The present invention is not limited to the burner design illustrated in FIG. 1, but comprehends all combustors involving the formation of a circulating flow wherein a neutral fluid is fed between the circulating flow and the premixed gas. For example, the present invention can be applied to combustors having various flame-holding plates and combustors forming a circulating flow or a stagnation point in a region having an abruptly expanded flow path.

Claims (2)

  1. A method for the combustion of a premixed gas in a combustor having a fuel-air premixing nozzle which comprises feeding a fluid containing no fuel between a premixed gas layer formed by injecting said premixed gas through said premixing nozzle and a hot gas layer formed from a portion of the hot gas resulting from the combustion of said premixed gas, the hot gas layer circulating or staying in a region downstream of the outlet of said premixing nozzle.
  2. A combustor having a fuel-air premixing nozzle around a pilot nozzle which is characterized in that a means for feeding a fluid containing no fuel is provided between an outer periphery of a tip of said pilot nozzle and an outlet of said premixing nozzle.
EP94908507A 1993-03-08 1994-03-08 Premixed gas burning method and combustor Expired - Lifetime EP0643267B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP7294893 1993-03-08
JP72948/93 1993-03-08
JP07294893A JP3197103B2 (en) 1993-03-08 1993-03-08 Premixed air combustion method
PCT/JP1994/000363 WO1994020793A1 (en) 1993-03-08 1994-03-08 Premixed gas burning method and combustor

Publications (3)

Publication Number Publication Date
EP0643267A1 true EP0643267A1 (en) 1995-03-15
EP0643267A4 EP0643267A4 (en) 1996-03-27
EP0643267B1 EP0643267B1 (en) 1999-07-28

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EP94908507A Expired - Lifetime EP0643267B1 (en) 1993-03-08 1994-03-08 Premixed gas burning method and combustor

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EP (1) EP0643267B1 (en)
JP (1) JP3197103B2 (en)
CA (1) CA2134893C (en)
DE (1) DE69419679T2 (en)
WO (1) WO1994020793A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0754908A2 (en) * 1995-07-20 1997-01-22 DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- Method and apparatus for suspressing flame and pressure vibrations in a furnace
WO1999004198A1 (en) * 1997-07-14 1999-01-28 Siemens Westinghouse Power Corporation PILOT BURNER WITH MEANS FOR STEAM INJECTION AND METHOD OF COMBUSTION WITH REDUCED NOx EMISSIONS
EP0900982A2 (en) * 1997-09-08 1999-03-10 Mitsubishi Heavy Industries, Ltd. Gas turbine combustor
EP1114967A1 (en) * 2000-01-07 2001-07-11 ALSTOM Power (Schweiz) AG Method and device for suppressing whirls in a turbo-engine
EP1134494A1 (en) * 2000-03-14 2001-09-19 Mitsubishi Heavy Industries, Ltd. Gas turbine combustor
EP1278013A2 (en) * 2001-07-17 2003-01-22 Mitsubishi Heavy Industries, Ltd. Pilot burner, premixing combustor, and gas turbine

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JPS63253147A (en) * 1987-04-09 1988-10-20 Nissan Motor Co Ltd Idling engine speed control device for internal combustion engine
DE69930455T2 (en) 1998-11-12 2006-11-23 Mitsubishi Heavy Industries, Ltd. Gas turbine combustor
CN100590359C (en) * 2004-03-03 2010-02-17 三菱重工业株式会社 Combustor
JP2007162998A (en) 2005-12-13 2007-06-28 Kawasaki Heavy Ind Ltd Fuel spraying device of gas turbine engine
JP4829315B2 (en) * 2009-01-16 2011-12-07 川崎重工業株式会社 Fuel spray system for gas turbine engine
JP6004976B2 (en) * 2013-03-21 2016-10-12 三菱重工業株式会社 Combustor and gas turbine
US9781307B2 (en) 2014-11-14 2017-10-03 Sawgrass Technologies, Inc. Networked digital imaging customization
US9302468B1 (en) 2014-11-14 2016-04-05 Ming Xu Digital customizer system and method
CN105953219B (en) * 2016-06-21 2018-01-16 上海齐耀热能工程有限公司 Flameless combustion apparatus

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US3724207A (en) * 1971-08-05 1973-04-03 Gen Motors Corp Combustion apparatus
US4373325A (en) * 1980-03-07 1983-02-15 International Harvester Company Combustors
JPH04340020A (en) * 1991-05-15 1992-11-26 Mitsubishi Heavy Ind Ltd Gas turbine combustor

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GB1427146A (en) * 1972-09-07 1976-03-10 Rolls Royce Combustion apparatus for gas turbine engines
GB1429677A (en) * 1973-03-20 1976-03-24 Rolls Royce Gas turbine engine combustion equipment
JPS6122106A (en) * 1984-07-10 1986-01-30 Hitachi Ltd Gas turbine conbustor
JPH01118023A (en) * 1987-10-30 1989-05-10 Hitachi Ltd Gas turbine combustor

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US3724207A (en) * 1971-08-05 1973-04-03 Gen Motors Corp Combustion apparatus
US4373325A (en) * 1980-03-07 1983-02-15 International Harvester Company Combustors
JPH04340020A (en) * 1991-05-15 1992-11-26 Mitsubishi Heavy Ind Ltd Gas turbine combustor

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Title
PATENT ABSTRACTS OF JAPAN vol. 17 no. 191 (M-1396) ,14 April 1993 & JP-A-04 340020 (MITSUBISHI HEAVY IND LTD) 26 November 1992, *
See also references of WO9420793A1 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0754908A2 (en) * 1995-07-20 1997-01-22 DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- Method and apparatus for suspressing flame and pressure vibrations in a furnace
EP0754908A3 (en) * 1995-07-20 1998-01-21 DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- Method and apparatus for suspressing flame and pressure vibrations in a furnace
WO1999004198A1 (en) * 1997-07-14 1999-01-28 Siemens Westinghouse Power Corporation PILOT BURNER WITH MEANS FOR STEAM INJECTION AND METHOD OF COMBUSTION WITH REDUCED NOx EMISSIONS
US5987875A (en) * 1997-07-14 1999-11-23 Siemens Westinghouse Power Corporation Pilot nozzle steam injection for reduced NOx emissions, and method
EP0900982A2 (en) * 1997-09-08 1999-03-10 Mitsubishi Heavy Industries, Ltd. Gas turbine combustor
EP0900982A3 (en) * 1997-09-08 2000-08-02 Mitsubishi Heavy Industries, Ltd. Gas turbine combustor
EP1114967A1 (en) * 2000-01-07 2001-07-11 ALSTOM Power (Schweiz) AG Method and device for suppressing whirls in a turbo-engine
US6698209B1 (en) 2000-01-07 2004-03-02 Alstom Technology Ltd Method of and appliance for suppressing flow eddies within a turbomachine
EP1134494A1 (en) * 2000-03-14 2001-09-19 Mitsubishi Heavy Industries, Ltd. Gas turbine combustor
US6631614B2 (en) 2000-03-14 2003-10-14 Mitsubishi Heavy Industries, Ltd. Gas turbine combustor
EP1278013A2 (en) * 2001-07-17 2003-01-22 Mitsubishi Heavy Industries, Ltd. Pilot burner, premixing combustor, and gas turbine
EP1278013A3 (en) * 2001-07-17 2004-04-14 Mitsubishi Heavy Industries, Ltd. Pilot burner, premixing combustor, and gas turbine

Also Published As

Publication number Publication date
JPH06257750A (en) 1994-09-16
EP0643267A4 (en) 1996-03-27
CA2134893C (en) 1999-09-07
EP0643267B1 (en) 1999-07-28
WO1994020793A1 (en) 1994-09-15
JP3197103B2 (en) 2001-08-13
DE69419679T2 (en) 2000-03-02
CA2134893A1 (en) 1994-09-15
DE69419679D1 (en) 1999-09-02

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