EP0987491A1 - Procédé pour prévenir les instabilités d'écoulement dans un brûleur - Google Patents

Procédé pour prévenir les instabilités d'écoulement dans un brûleur Download PDF

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Publication number
EP0987491A1
EP0987491A1 EP98810924A EP98810924A EP0987491A1 EP 0987491 A1 EP0987491 A1 EP 0987491A1 EP 98810924 A EP98810924 A EP 98810924A EP 98810924 A EP98810924 A EP 98810924A EP 0987491 A1 EP0987491 A1 EP 0987491A1
Authority
EP
European Patent Office
Prior art keywords
burner
combustion air
flow
air
fault
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
EP98810924A
Other languages
German (de)
English (en)
Other versions
EP0987491B1 (fr
Inventor
Christian Oliver Dr. Paschereit
Jakob Prof. Dr. Keller
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 Power Schweiz AG
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 Power Schweiz AG, ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical Alstom Power Schweiz AG
Priority to EP98810924A priority Critical patent/EP0987491B1/fr
Priority to DE59812944T priority patent/DE59812944D1/de
Priority to US09/382,628 priority patent/US6390805B1/en
Priority to JP11254540A priority patent/JP2000104923A/ja
Publication of EP0987491A1 publication Critical patent/EP0987491A1/fr
Application granted granted Critical
Publication of EP0987491B1 publication Critical patent/EP0987491B1/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
    • F23C7/02—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 
    • 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
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • 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
    • F23D2206/00—Burners for specific applications
    • F23D2206/10—Turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2210/00—Noise abatement

Definitions

  • the present invention relates to the field of burners, in particular the burner for use in gas turbines. It relates to a device and a Method for operating a burner, in which a combustion air flow Fuel is transported to a combustion chamber, where the fuel is burned.
  • thermoacoustic oscillations triggered by fluctuations in reaction rates.
  • These largely coherent waves lead to a burner of the above Kind in typical operating conditions for vibrations with frequencies of about 100 Hz. Since this frequency with typical fundamental eigenmodes of of many ring burners of gas turbines coincide, the thermoacoustic ones Oscillations are a problem.
  • the invention is therefore based on the object, a device or a To provide burner, as well as a method, which the training of coherent flow instabilities of the combustion air flow after exiting the Prevents combustion chamber.
  • a first preferred embodiment of the invention is characterized in that that the coherent flow instabilities after the combustion air flow exits into the combustion chamber due to shear layers between the combustion air flow and essentially stationary hot gases occur in the combustion chamber, and that the fault air attacks these shear layers. Then is preferred the fault air is substantially perpendicular to a main flow direction of the Combustion air flow and substantially parallel to the shear layers, preferred even injected into the shear layers, into the combustion air flow. Thereby the formation of Kelvin-Helmholz waves in the direction of flow is targeted in the Core suffocated.
  • Another embodiment of the invention is characterized in that it the burner is a double cone burner that the injection of the Fault air occurs through fault nozzles, and that the fault air is immediately at the front edges of the half-cones take place where the shear layers form. Furthermore, the fault nozzles are preferred evenly in certain Distances distributed on the circumferences of the front edges of the half-cones, so the periodicity of the waves on the shear layers is disturbed, which prevents of the thermoacoustic oscillations in the seeds of their formation.
  • ⁇ is the growth exponent of the disturbance in 1 / s
  • U 0 is the edge speed at the shear layer 10
  • k z is the component of the wave vector along z, ie in the transverse direction.
  • the idea now is to induce a suitable transverse disturbance in the shear layer to prevent the Kelvin-Helmholtz waves.
  • the thickness of the shear layer 10 should actually be calculated at the point of the wave refraction.
  • FIG. 5 shows various views of a double-cone burner, on the basis of which the technical implementation of the principle described above is to be shown.
  • Figure 5a shows a perspective view of a double-cone burner.
  • the combustion air 14 passes laterally through the entry slots 23 with slightly shifted Hollow half-cones 18 and 21 arranged in axes flow to the front end of the burner under the description of a slight curve, and occurs after passing the front edges 24 of the cones from the burner 26 into the combustion chamber.
  • a cylindrical part 20 At the tapered end of the halyards 18 and 21 is a cylindrical part 20, in which is arranged a fuel nozzle which in this case liquid Fuel is injected centrally between the two half cones 18 and 21.
  • the combustion air flow 14 envelops the injected fuel and a fuel cone is formed, which widens towards the front, and which after leaving the Combustion chamber 28 burns in the flame 17 at the burner mouth 27.
  • FIG. 5c shows a view from above of the double-cone burner 26.
  • the spacing of the interference nozzles 16 is easy to understand.
  • the transversal disturbance so that the 5 cm mentioned in the numerical example above results in wavelength ⁇ z , must take place in such a way that the disturbance nozzles 16 generate disturbance air streams 22 which are 5 cm apart in the x direction, ie in the flow direction of the combustion air stream 15.
  • FIG. 5d) shows a schematic front view of a double-cone burner 26.
  • the orthogonal flow of the two air flows 15 and 22 can again be seen. It is important that the injected air 22 does not have any strong, inward-facing components so that the main air flow 15 is not disturbed.
  • the total pressure of the injection of the disturbance air 22 must be at least as high as the total pressure of the combustion air 15 flowing past, so that significant transverse disturbances can form at all.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP98810924A 1998-09-16 1998-09-16 Procédé pour prévenir les instabilités d'écoulement dans un brûleur Expired - Lifetime EP0987491B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98810924A EP0987491B1 (fr) 1998-09-16 1998-09-16 Procédé pour prévenir les instabilités d'écoulement dans un brûleur
DE59812944T DE59812944D1 (de) 1998-09-16 1998-09-16 Verfahren zur Verhinderung von Strömungsinstabilitäten in einem Brenner
US09/382,628 US6390805B1 (en) 1998-09-16 1999-08-25 Method of preventing flow instabilities in a burner
JP11254540A JP2000104923A (ja) 1998-09-16 1999-09-08 バ―ナにおける流動不安定性を回避するための方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810924A EP0987491B1 (fr) 1998-09-16 1998-09-16 Procédé pour prévenir les instabilités d'écoulement dans un brûleur

Publications (2)

Publication Number Publication Date
EP0987491A1 true EP0987491A1 (fr) 2000-03-22
EP0987491B1 EP0987491B1 (fr) 2005-07-20

Family

ID=8236326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810924A Expired - Lifetime EP0987491B1 (fr) 1998-09-16 1998-09-16 Procédé pour prévenir les instabilités d'écoulement dans un brûleur

Country Status (4)

Country Link
US (1) US6390805B1 (fr)
EP (1) EP0987491B1 (fr)
JP (1) JP2000104923A (fr)
DE (1) DE59812944D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1114967A1 (fr) * 2000-01-07 2001-07-11 ALSTOM Power (Schweiz) AG Procédé et dispositif pour supprimer les tourbillons dans une turbomachine
US6834504B2 (en) 2001-07-26 2004-12-28 Alstom Technology Ltd Premix burner with high flame stability having a net-like structure within the mixing section
CN115751378A (zh) * 2022-11-10 2023-03-07 南昌航空大学 一种带梯形筋条和三角凸块的支板火焰稳定器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX370842B (es) * 2013-06-17 2020-01-08 Schlumberger Technology Bv Montaje de quemador para encender gases de bajo contenido calorifico.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879939A (en) * 1973-04-18 1975-04-29 United Aircraft Corp Combustion inlet diffuser employing boundary layer flow straightening vanes
EP0433790A1 (fr) * 1989-12-22 1991-06-26 Asea Brown Boveri Ag BrÀ»leur
US5345768A (en) * 1993-04-07 1994-09-13 General Electric Company Dual-fuel pre-mixing burner assembly
US5758587A (en) * 1995-07-20 1998-06-02 Horst Buchner Process and device for suppression of flame and pressure pulsations in a furnace

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1134996A (en) 1967-04-21 1968-11-27 Lev Iosifovich Sorkin Jet noise suppressor in jet engine
US3788065A (en) * 1970-10-26 1974-01-29 United Aircraft Corp Annular combustion chamber for dissimilar fluids in swirling flow relationship
JPS5632961A (en) 1979-08-25 1981-04-02 Minamoto:Kk Oshizushi (pressed vinegared fish and rice) of yellowtail and its preparation
JPS5632962A (en) 1979-08-27 1981-04-02 Hiroji Shimizu Forming device for maki (rolled)sushi (vinegared rice with fish and vegetables)
JPS57108507A (en) * 1980-12-25 1982-07-06 Matsushita Electric Ind Co Ltd Gun type burner
JPS57108508A (en) * 1980-12-25 1982-07-06 Matsushita Electric Ind Co Ltd Gun type burner
CH674561A5 (fr) 1987-12-21 1990-06-15 Bbc Brown Boveri & Cie
DE19654116A1 (de) * 1996-12-23 1998-06-25 Abb Research Ltd Brenner zum Betrieb einer Brennkammer mit einem flüssigen und/oder gasförmigen Brennstoff

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879939A (en) * 1973-04-18 1975-04-29 United Aircraft Corp Combustion inlet diffuser employing boundary layer flow straightening vanes
EP0433790A1 (fr) * 1989-12-22 1991-06-26 Asea Brown Boveri Ag BrÀ»leur
US5345768A (en) * 1993-04-07 1994-09-13 General Electric Company Dual-fuel pre-mixing burner assembly
US5758587A (en) * 1995-07-20 1998-06-02 Horst Buchner Process and device for suppression of flame and pressure pulsations in a furnace

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1114967A1 (fr) * 2000-01-07 2001-07-11 ALSTOM Power (Schweiz) AG Procédé et dispositif pour supprimer les tourbillons dans une turbomachine
DE10000415A1 (de) * 2000-01-07 2001-09-06 Alstom Power Schweiz Ag Baden Verfahren und Vorrichtung zur Unterdrückung von Strömungswirbeln innerhalb einer Strömungskraftmaschine
US6698209B1 (en) 2000-01-07 2004-03-02 Alstom Technology Ltd Method of and appliance for suppressing flow eddies within a turbomachine
US6834504B2 (en) 2001-07-26 2004-12-28 Alstom Technology Ltd Premix burner with high flame stability having a net-like structure within the mixing section
CN115751378A (zh) * 2022-11-10 2023-03-07 南昌航空大学 一种带梯形筋条和三角凸块的支板火焰稳定器

Also Published As

Publication number Publication date
US6390805B1 (en) 2002-05-21
DE59812944D1 (de) 2005-08-25
EP0987491B1 (fr) 2005-07-20
JP2000104923A (ja) 2000-04-11

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