EP1217295A2 - Brûleur pour la génération d'un gaz chaud - Google Patents

Brûleur pour la génération d'un gaz chaud Download PDF

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Publication number
EP1217295A2
EP1217295A2 EP01129165A EP01129165A EP1217295A2 EP 1217295 A2 EP1217295 A2 EP 1217295A2 EP 01129165 A EP01129165 A EP 01129165A EP 01129165 A EP01129165 A EP 01129165A EP 1217295 A2 EP1217295 A2 EP 1217295A2
Authority
EP
European Patent Office
Prior art keywords
burner
outlet
combustion chamber
partial bodies
boundary layer
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
EP01129165A
Other languages
German (de)
English (en)
Other versions
EP1217295B1 (fr
EP1217295A3 (fr
Inventor
Christian Oliver Dr. Paschereit
Ephraim Prof. Dr. Gutmark
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.)
General Electric Technology GmbH
Original Assignee
Alstom Schweiz AG
Alstom Power NV
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.)
Filing date
Publication date
Application filed by Alstom Schweiz AG, Alstom Power NV filed Critical Alstom Schweiz AG
Publication of EP1217295A2 publication Critical patent/EP1217295A2/fr
Publication of EP1217295A3 publication Critical patent/EP1217295A3/fr
Application granted granted Critical
Publication of EP1217295B1 publication Critical patent/EP1217295B1/fr
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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/02—Disposition of air supply not passing through burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/07002—Premix burners with air inlet slots obtained between offset curved wall surfaces, e.g. double cone burners
    • 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
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00014—Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators

Definitions

  • the present invention relates to the field of burner technology. she relates to a burner for generating hot gases according to the preamble of claim 1.
  • thermoacoustic vibrations The fluid mechanical stability of a gas turbine burner is crucial Significance for the occurrence of thermoacoustic vibrations.
  • fluid mechanics Instability waves that occur on the burner lead to Formation of eddies (coherent structures) that affect combustion and periodic heat release with the associated pressure fluctuations (thermoacoustic vibrations).
  • the thermoacoustic Vibrations pose a threat to any type of combustion application They lead to pressure vibrations of high amplitude, to a restriction of the operating area and can increase pollutant emissions. This hits especially for combustion systems with low acoustic damping.
  • Allowing a wide operating range can be an active control of combustion vibrations to be necessary.
  • EP-A1-0 918 152 proposes the thermoacoustic vibrations in a combustion system by checking that in the area of the Burner means for acoustic excitation of the working gas can be arranged. However, this is associated with additional equipment and control effort.
  • a similar acoustic concept (EP-A1-1 050 713) works with an active one Suppression by a feedback control loop with the corresponding Phase rotation.
  • EP-A1-0 987 495 it is proposed to additionally mix an inert gas such as N 2 , CO 2 or the like to the fuel stream in order to minimize thermoacoustic vibrations in gas turbine combustion chambers.
  • an inert gas such as N 2 , CO 2 or the like
  • EP-A1-1 002 992 proposes to control Flow instabilities in the burner along the inside of the burner outlet to arrange the circumference of a plurality of nozzles, which are injected by air axial vortex strength into the flow at an angle to the direction of flow contribute.
  • EP-A1-0 985 877 also proposes to minimize thermoacoustic Vibrations in gas turbine combustors change the flow in axial Accelerate direction by making the burner outlet nozzle-like, or nozzle-like attachments on the burner.
  • EP-A1-1 048 898 discloses a burner (double-cone burner) in which a plurality for introducing axial eddy strength in the burner cone of internals protruding into the flow.
  • Coherent structures play a crucial role in mixing processes between air and fuel.
  • the dynamics of these structures influenced consequently the combustion and thus the heat release.
  • By influencing the shear layer between the fresh gas mixture and the recirculated Exhaust gas can be used to control combustion instabilities (see e.g. Paschereit et al., "Structure and Control of Thermoacoustic Instabilities in a Gas turbine burner, Combustion, Sclence & Technology, vol. 138, p. 213-232 (1998)).
  • it makes sense to develop coherent structures by influencing the outflow boundary layer at the burner outlet.
  • the basic idea of the invention is to create coherent structures influence that the emergence of high-frequency combustion-powered Vibration is prevented.
  • Coherent structures are here as flow vortices to understand that due to flow instabilities in the burner outlet forming shear layers.
  • the influence of coherent structures on The combustion instability is most pronounced when the flow instability their highest growth rate has overlapped and the vertebrae their maximum Have reached size.
  • the axial position of the highest growth rate can be inter alia by changing the thickness of the outflow boundary layer.
  • a preferred embodiment of the invention is characterized in that the means for changing the thickness of the outflow boundary layer a shear fence comprise, which runs along the exit edge of the burner outlet and with its height essentially parallel to the direction of flow into the combustion chamber protrudes.
  • the shear layer fence which is preferably a height of has a few millimeters, the thickness of the Outflow boundary layer enlarged and thus the formation of eddies in the axial direction shifted out of the area of the flame, so that with the vortex formation associated periodic heat releases do not occur.
  • the burner is preferably designed and comprises a double-cone burner at least two hollow, conical, nested in the flow direction Partial bodies whose central axes are offset from one another, such that Adjacent walls of the partial body tangential air inlet channels for the inflow of combustion air in the interior delimited by the partial bodies form, the combustion chamber side edges of the partial body the trailing edges of the Form burner outlet.
  • Fig. 1 is the top view from the front (against the flow direction) Structure of a double-cone burner shown, e.g. from EP-A1-1 048 898 is known and is particularly suitable for realizing the invention.
  • the Burner 10 comprises two conical partial bodies 11 and 12, which are in a central plane are offset from one another, such that adjacent walls of the partial body 11, 12 tangential air inlet channels for the inflow of combustion air in the inner space 25 delimited by the partial bodies 11, 12.
  • the Interior 25 opens with a burner outlet 22 to a subsequent one Combustion chamber 23 (Fig. 2).
  • Fig. 2 Form the edges of the partial bodies 11, 12 on the combustion chamber side the exit edges 16, 17 of the burner outlet 22.
  • Around the burner outlet 22 is a front panel 14 extending transversely to the direction of flow attached, which are provided with a plurality of distributed holes 15 is.
  • a central fuel nozzle 13 leads into the interior 25 of the burner 10 Fuel injected and with the tangentially flowing air to a fuel-air mixture swirled. Parallel to that emerging from the burner outlet 22 Air-fuel mixture flows through the holes 15 air. The fuel-air mixture burns in the combustion chamber 23 with a flame 20. At the outlet edges 16, 17 of the burner outlet 22 form between the outflowing Fuel-air mixture and the surrounding air form an outflow boundary layer 18. Shear layers with flow instabilities form in the outflow boundary layer 18, which are used to form coherent structures in the form of flow vortices to lead. The influence of these coherent structures on combustion instabilities in combustion chamber 23 is most pronounced when the flow instability has exceeded its highest growth rate and vertebrae 19 has exceeded its maximum Have reached size (Fig. 2)
  • a shear layer fence 21 e.g. in the form of a sheet metal strip which runs along the exit edge 16, 17 of the burner outlet 22 and with its height essentially parallel to the direction of flow in the Combustion chamber 23 protrudes.
  • Fig. 3 is the effect of the invention on the suppression of a pressure vibration shown in the 1000 Hz range.
  • Fig. 3 are those measured with two sensors Pressure amplitudes (Amp) depending on the thermal output (Power) of a burner with shear shift fence 21 (full circles and rectangles) and without a shear shift fence (empty circles and rectangles). you 3 clearly recognizes that the occurrence of the vibrations from one certain performance point largely prevented with the help of the sheared fence can be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP01129165A 2000-12-23 2001-12-08 Brûleur pour la génération d'un gaz chaud Expired - Lifetime EP1217295B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10065206 2000-12-23
DE10065206 2000-12-23
DE10120960 2001-04-27
DE10120960 2001-04-27

Publications (3)

Publication Number Publication Date
EP1217295A2 true EP1217295A2 (fr) 2002-06-26
EP1217295A3 EP1217295A3 (fr) 2002-11-20
EP1217295B1 EP1217295B1 (fr) 2006-08-23

Family

ID=26008099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01129165A Expired - Lifetime EP1217295B1 (fr) 2000-12-23 2001-12-08 Brûleur pour la génération d'un gaz chaud

Country Status (3)

Country Link
US (1) US6773257B2 (fr)
EP (1) EP1217295B1 (fr)
DE (1) DE50110801D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100119984A1 (en) * 2008-11-10 2010-05-13 Fox Allen G Abatement system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881432A2 (fr) 1997-05-26 1998-12-02 Abb Research Ltd. Brûleur pour la mise en oeuvre d'une unité pour la génération d'un gaz chaud
EP0918152A1 (fr) 1997-11-24 1999-05-26 Abb Research Ltd. Procédé et dispositif pour contrÔler les vibrations thermoacoustiques dans les chambres de combustion
EP0985877A1 (fr) 1998-09-10 2000-03-15 Abb Research Ltd. Dispositif et procédé pour réduire au minimum les vibrations thermoacoustques dans les chambres de combustion de turbines à gaz
EP0987495A1 (fr) 1998-09-16 2000-03-22 Abb Research Ltd. Procédé pour minimiser les vibrations thermoacoustiques dans les chambres de combustion de turbines à gaz
EP1002992A1 (fr) 1998-11-18 2000-05-24 Abb Research Ltd. Brûleur
EP1048898A1 (fr) 1998-11-18 2000-11-02 Abb Research Ltd. Brûleur
EP1050713A1 (fr) 1999-05-07 2000-11-08 ABB Alstom Power (Schweiz) AG Procédé de suppression respectivement de contrôle de vibrations thermoacoustiques dans une chambre de combustion ainsi que chambre de combustion pour la mise en oeuvre du procédé

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4330083A1 (de) * 1993-09-06 1995-03-09 Abb Research Ltd Verfahren zum Betrieb eines Vormischbrenners
DE19547912A1 (de) * 1995-12-21 1997-06-26 Abb Research Ltd Brenner für einen Wärmeerzeuger
DE19548853A1 (de) * 1995-12-27 1997-07-03 Abb Research Ltd Kegelbrenner
US5865609A (en) * 1996-12-20 1999-02-02 United Technologies Corporation Method of combustion with low acoustics
WO1999006767A1 (fr) * 1997-07-31 1999-02-11 Siemens Aktiengesellschaft Brûleur
DE19736902A1 (de) 1997-08-25 1999-03-04 Abb Research Ltd Brenner für einen Wärmeerzeuger
DE19757189B4 (de) * 1997-12-22 2008-05-08 Alstom Verfahren zum Betrieb eines Brenners eines Wärmeerzeugers
EP0931979A1 (fr) * 1998-01-23 1999-07-28 DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- Procédé et dispositif pour supprimer les fluctuations par flamme et par pression dans un four
DE19831933C1 (de) * 1998-07-16 2000-01-27 Viessmann Werke Kg Verfahren und Brenner zur Vermeidung von thermoakustischen Flamm- bzw. Druckschwingungen in mit gebläseunterstützten Brennern betriebenen Feuerungen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881432A2 (fr) 1997-05-26 1998-12-02 Abb Research Ltd. Brûleur pour la mise en oeuvre d'une unité pour la génération d'un gaz chaud
EP0918152A1 (fr) 1997-11-24 1999-05-26 Abb Research Ltd. Procédé et dispositif pour contrÔler les vibrations thermoacoustiques dans les chambres de combustion
EP0985877A1 (fr) 1998-09-10 2000-03-15 Abb Research Ltd. Dispositif et procédé pour réduire au minimum les vibrations thermoacoustques dans les chambres de combustion de turbines à gaz
EP0987495A1 (fr) 1998-09-16 2000-03-22 Abb Research Ltd. Procédé pour minimiser les vibrations thermoacoustiques dans les chambres de combustion de turbines à gaz
EP1002992A1 (fr) 1998-11-18 2000-05-24 Abb Research Ltd. Brûleur
EP1048898A1 (fr) 1998-11-18 2000-11-02 Abb Research Ltd. Brûleur
EP1050713A1 (fr) 1999-05-07 2000-11-08 ABB Alstom Power (Schweiz) AG Procédé de suppression respectivement de contrôle de vibrations thermoacoustiques dans une chambre de combustion ainsi que chambre de combustion pour la mise en oeuvre du procédé

Also Published As

Publication number Publication date
DE50110801D1 (de) 2006-10-05
US20020182553A1 (en) 2002-12-05
EP1217295B1 (fr) 2006-08-23
US6773257B2 (en) 2004-08-10
EP1217295A3 (fr) 2002-11-20

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