EP1048898A1 - Brûleur - Google Patents

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Publication number
EP1048898A1
EP1048898A1 EP98811145A EP98811145A EP1048898A1 EP 1048898 A1 EP1048898 A1 EP 1048898A1 EP 98811145 A EP98811145 A EP 98811145A EP 98811145 A EP98811145 A EP 98811145A EP 1048898 A1 EP1048898 A1 EP 1048898A1
Authority
EP
European Patent Office
Prior art keywords
burner
internals
flow
burner according
air
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
EP98811145A
Other languages
German (de)
English (en)
Other versions
EP1048898B1 (fr
Inventor
Ephraim Prof. Dr. Gutmark
Christian Oliver Dr. Paschereit
Wolfgang Weisenstein
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 Switzerland GmbH
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Priority to EP98811145A priority Critical patent/EP1048898B1/fr
Priority to DE59810606T priority patent/DE59810606D1/de
Priority to US09/434,448 priority patent/US6196835B1/en
Priority to DE10022969A priority patent/DE10022969A1/de
Publication of EP1048898A1 publication Critical patent/EP1048898A1/fr
Application granted granted Critical
Publication of EP1048898B1 publication Critical patent/EP1048898B1/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
    • 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
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • 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
    • F23D—BURNERS
    • F23D2210/00—Noise abatement

Definitions

  • the invention relates to a burner for operating a unit for generating a Hot gas.
  • the cooling air flowing into the combustion chamber has a sound-absorbing effect and thus contributes to damping thermoacoustic vibrations.
  • an increasing proportion of the air is passed through the burners themselves in modern gas turbines and the cooling air flow is reduced.
  • the problems mentioned at the outset occur increasingly in modern combustion chambers.
  • One way of soundproofing is to connect Helmholtz dampers in the combustion chamber hood or in the area of the cooling air supply. In tight Space as is typical for modern, compact combustion chambers such dampers can be difficult to accommodate and is associated with great design effort.
  • thermoacoustic vibrations through active acoustic excitation.
  • the one that develops in the area of the burner Scher für acoustically excited With a suitable phase position between the Thereby, damping of thermoacoustic vibrations and excitation can be achieved of the combustion chamber vibrations.
  • damping of thermoacoustic vibrations and excitation can be achieved of the combustion chamber vibrations.
  • such a solution requires the installation of additional elements in the combustion chamber.
  • the invention as characterized in the claims is the task of creating a device that is effective Suppression of thermoacoustic vibrations possible and with as possible low design effort. This object is achieved according to the invention solved by the burner according to claim 1.
  • Coherent structures play a crucial role in mixing processes between air and fuel.
  • the spatial and temporal dynamics of these structures affects combustion and heat release.
  • the invention is now the Based on the idea of disturbing the formation of coherent vortex structures the periodic heat release fluctuation and thus the amplitude of the reduce thermoacoustic fluctuations.
  • a burner according to the invention for operating a unit for generating a Hot gas consists essentially of at least two hollow, towards the Flow nested partial bodies, their central axes to each other run offset, such that adjacent walls of the partial body to the Burner slots tangential air inlet channels for the inflow of combustion air form into an interior space specified by the partial bodies.
  • the burner exhibits axial eddy strength in the flow a plurality of internals protruding into the flow.
  • the internals are arranged at the burner outlet. It has also proven to be particularly advantageous if the internals both are arranged at the burner outlet and along the burner slots.
  • Vortex generator is a device that designates the axial vortex strength in introduces a current without a recirculation zone in a wake area produce.
  • the flow instabilities in the burner mostly have a dominant mode.
  • the damping of this dominant mode is a priority for the suppression of thermoacoustic vibrations.
  • the relevant frequencies are between a few 10 Hz and a few kHz.
  • the convection speed depends on the burner and is typically a few 10 m / s, for example 30 m / s.
  • the dominant fashion suppresses particularly effectively becomes, if the distances s of adjacent installation elements smaller or approximately are equal to half the wavelength of the dominant fashion. This applies to the distance Installations installed along the burner outlet, such as for those along the burner slots arranged elements.
  • Figure 1 shows a known premix burner, which consists of two half hollow conical bodies 1, 2, which are arranged offset to one another.
  • the partial cone bodies 1, 2 have cylindrical starting parts 9, 10, which include a fuel nozzle 11 through which liquid Fuel 12 is injected.
  • the partial cone bodies 1, 2 each as required a fuel line 13, 14, which are provided with openings 15 through which gaseous fuel 16 flowing through the tangential air inlet channels 5, 6 Combustion air 7 is added.
  • the burner has a collar-shaped, as anchoring for the Partial cone body 1, 2 serving front plate 18 with a number of holes 19, through which, if necessary, dilution air or cooling air 20 the front part of the Combustion chamber or its wall can be supplied.
  • the fuel injection can be an air-assisted nozzle or one Act nozzle working according to the pressure atomization principle.
  • the conical spray pattern is enclosed by the combustion air flows 7 flowing in tangentially.
  • the concentration of the injected fuel 12 becomes in the direction of the flow 30 continuously degraded by the combustion air streams 7.
  • the mixture formation with the combustion air 7 already begins in this area.
  • the optimal homogeneous fuel concentration achieved across the cross-section.
  • the ignition of the fuel / combustion air mixture begins at the top of the backflow zone 24. Only at this point can a stable flame front 25 arise.
  • each partial cone body had 1.2 at the burner outlet ten triangular internals 32 attached, the total of a sawtooth structure formed (Fig. 2).
  • the dimensions of the structure depended on the wavelength the dominant mode of flow instability to be suppressed, its Frequency in the exemplary embodiment was in the kHz range.
  • the experimental determination 5 shows that the amplitude of the thermoacoustic Fluctuations due to the internals ("sawtooth internals", open circles) compared to a conventional burner ("unchanged", full squares) by one can be reduced by two orders of magnitude.
  • FIG. 6 shows the results of an experimental determination the pressure fluctuations in the 100 Hz range when using conventional Burners ("unchanged”, full squares) and burners according to the previous one Au entrysbeispiels the invention ("sawtooth internals", open circles) as a function the air number ⁇ .
  • the air ratio ⁇ is a measure of the ratio of those in the combustion chamber introduced to that theoretically required for complete combustion Air volume.
  • the present invention changes the amplitude the pressure vibrations in the particularly relevant range 1.8 ⁇ ⁇ ⁇ 2.2 still significantly reduced in the 100 Hz range.
  • Vortex generators 34 instead of geometrically simple internals, Vortex generators 34 used as internals.
  • Figures 4a-b show two embodiments for vortex generators 34, each on the edge 36 of a partial cone body are attached.
  • the reference numeral 40 denotes the local flow direction of the work equipment.
  • the vortex structures generated by the vortex generators 34 42 are each shown schematically.
  • the vortex generator of Fig. 4a creates a pair of vertebrae that rotate inwards, similar to a delta wing.
  • the vortex generator shown in FIG. 4b generates an outward rotating pair of vertebrae.
  • vortex generators 34 were in the burner built-in. Ten of the vortex generators were along the burner outlet as in Fig. 2 the circumference of the partial cone body 1.2 attached. Five further vortex generators each were fixed along the burner slots 5a, 6a as shown in FIG. 3 shows only one of the two burner slots.
  • FIG. 7 shows the results of an experimental determination of the pressure fluctuations in the 100 Hz range depending on the air ratio ⁇ when using a conventional burner ("unchanged”, full squares) and a burner with the described arrangement of vortex generators ("vortex generators", open circles).
  • the pressure fluctuations are compared to one over a wide range ⁇ ⁇ 2.2 unchanged burner significantly reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP98811145A 1998-11-18 1998-11-18 Brûleur Expired - Lifetime EP1048898B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98811145A EP1048898B1 (fr) 1998-11-18 1998-11-18 Brûleur
DE59810606T DE59810606D1 (de) 1998-11-18 1998-11-18 Brenner
US09/434,448 US6196835B1 (en) 1998-11-18 1999-11-05 Burner
DE10022969A DE10022969A1 (de) 1998-11-18 2000-05-14 Brenner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98811145A EP1048898B1 (fr) 1998-11-18 1998-11-18 Brûleur
DE10022969A DE10022969A1 (de) 1998-11-18 2000-05-14 Brenner

Publications (2)

Publication Number Publication Date
EP1048898A1 true EP1048898A1 (fr) 2000-11-02
EP1048898B1 EP1048898B1 (fr) 2004-01-14

Family

ID=26005629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98811145A Expired - Lifetime EP1048898B1 (fr) 1998-11-18 1998-11-18 Brûleur

Country Status (3)

Country Link
US (1) US6196835B1 (fr)
EP (1) EP1048898B1 (fr)
DE (1) DE10022969A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217295A2 (fr) 2000-12-23 2002-06-26 ALSTOM Power N.V. Brûleur pour la génération d'un gaz chaud
EP1975506A1 (fr) * 2007-03-30 2008-10-01 Siemens Aktiengesellschaft Pré-chambre de combustion

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19851636A1 (de) * 1998-11-10 2000-05-11 Asea Brown Boveri Dämpfungsvorrichtung zur Reduzierung der Schwingungsamplitude akustischer Wellen für einen Brenner
US6672862B2 (en) 2000-03-24 2004-01-06 North American Manufacturing Company Premix burner with integral mixers and supplementary burner system
GB2375601A (en) * 2001-05-18 2002-11-20 Siemens Ag Burner apparatus for reducing combustion vibrations
EP1262714A1 (fr) * 2001-06-01 2002-12-04 ALSTOM (Switzerland) Ltd Brûleur avec recirculation des gaz de combustion
JP4508474B2 (ja) * 2001-06-07 2010-07-21 三菱重工業株式会社 燃焼器
US6889686B2 (en) * 2001-12-05 2005-05-10 Thomas & Betts International, Inc. One shot heat exchanger burner
DE10205428A1 (de) * 2002-02-09 2003-09-11 Alstom Switzerland Ltd Vormischbrenner mit erhöhter Flammenstabilität
US7494337B2 (en) 2004-04-22 2009-02-24 Thomas & Betts International, Inc. Apparatus and method for providing multiple stages of fuel
US7097448B2 (en) * 2004-05-07 2006-08-29 Peter Chesney Vortex type gas lamp
US7726386B2 (en) * 2005-01-14 2010-06-01 Thomas & Betts International, Inc. Burner port shield
CA2497378A1 (fr) * 2005-02-16 2006-08-16 Alberta Welltest Incinerators Ltd. Dispositif thermique a phase gazeuse
CA2537685C (fr) * 2006-02-24 2013-05-14 9131-9277 Quebec Inc. Injecteur de combustible, bruleur et methode d'injection
US20090084292A1 (en) * 2007-09-27 2009-04-02 International Environmental Solutions Corporation Thermal Oxidizer With Enhanced Gas Mixing
CA2786597A1 (fr) 2010-01-06 2011-07-14 The Outdoor Greatroom Company LLLP Ensemble brasero
DE102014205203B3 (de) * 2014-03-20 2015-05-21 Kba-Metalprint Gmbh Vorrichtung zur thermischen Nachverbrennung von Abluft
DE102014205200B3 (de) * 2014-03-20 2015-06-11 Kba-Metalprint Gmbh Vorrichtung zur thermischen Nachverbrennung von Abluft
DE102014205198A1 (de) 2014-03-20 2015-09-24 Kba-Metalprint Gmbh Brenner und Vorrichtung zur thermischen Nachverbrennung von Abluft
DE102014205201A1 (de) * 2014-03-20 2015-09-24 Kba-Metalprint Gmbh Vorrichtung zur thermischen Nachverbrennung von Abluft
CN115704563B (zh) * 2021-08-13 2024-09-17 北京航空航天大学 燃烧室和燃烧器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129226A (en) * 1989-03-27 1992-07-14 General Electric Company Flameholder for gas turbine engine afterburner
US5433596A (en) * 1993-04-08 1995-07-18 Abb Management Ag Premixing burner
US5487274A (en) * 1993-05-03 1996-01-30 General Electric Company Screech suppressor for advanced low emissions gas turbine combustor
US5676538A (en) * 1993-06-28 1997-10-14 General Electric Company Fuel nozzle for low-NOx combustor burners
WO1998011383A2 (fr) * 1996-09-09 1998-03-19 Siemens Aktiengesellschaft Dispositif et procede pour la combustion d'un combustible dans l'air

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2262256A1 (en) * 1974-02-27 1975-09-19 Morin Bernard Oil burner silencer and economiser - fits over burner tip by pressing or screwing and has bell mouth
DE59402803D1 (de) * 1993-04-08 1997-06-26 Asea Brown Boveri Brennkammer
DE19542918A1 (de) * 1995-11-17 1997-05-22 Asea Brown Boveri Vorrichtung zur Dämpfung thermoakustischer Druckschwingungen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129226A (en) * 1989-03-27 1992-07-14 General Electric Company Flameholder for gas turbine engine afterburner
US5433596A (en) * 1993-04-08 1995-07-18 Abb Management Ag Premixing burner
US5487274A (en) * 1993-05-03 1996-01-30 General Electric Company Screech suppressor for advanced low emissions gas turbine combustor
US5676538A (en) * 1993-06-28 1997-10-14 General Electric Company Fuel nozzle for low-NOx combustor burners
WO1998011383A2 (fr) * 1996-09-09 1998-03-19 Siemens Aktiengesellschaft Dispositif et procede pour la combustion d'un combustible dans l'air

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217295A2 (fr) 2000-12-23 2002-06-26 ALSTOM Power N.V. Brûleur pour la génération d'un gaz chaud
US6773257B2 (en) 2000-12-23 2004-08-10 Alstom Technology Ltd Burner for the production of a hot gas
EP1975506A1 (fr) * 2007-03-30 2008-10-01 Siemens Aktiengesellschaft Pré-chambre de combustion
WO2008119737A1 (fr) * 2007-03-30 2008-10-09 Siemens Aktiengesellschaft Préchambre de combustion

Also Published As

Publication number Publication date
US6196835B1 (en) 2001-03-06
EP1048898B1 (fr) 2004-01-14
DE10022969A1 (de) 2001-11-15

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