US20090053054A1 - LEAKAGE REDUCING VENTURI FOR DRY LOW NITRIC OXIDES (NOx) COMBUSTORS - Google Patents

LEAKAGE REDUCING VENTURI FOR DRY LOW NITRIC OXIDES (NOx) COMBUSTORS Download PDF

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Publication number
US20090053054A1
US20090053054A1 US11/841,053 US84105307A US2009053054A1 US 20090053054 A1 US20090053054 A1 US 20090053054A1 US 84105307 A US84105307 A US 84105307A US 2009053054 A1 US2009053054 A1 US 2009053054A1
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United States
Prior art keywords
venturi
liner
weld
annular
aft
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.)
Abandoned
Application number
US11/841,053
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English (en)
Inventor
Neal William Grooms
Jeffrey Scott Lebegue
Derrick Walter Simons
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 Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US11/841,053 priority Critical patent/US20090053054A1/en
Assigned to GENERAL ELECTRIC COMPANY reassignment GENERAL ELECTRIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEBEGUE, JEFFREY SCOTT, SIMONS, DERRICK WALTER, GROOMS, NEAL WILLIAM
Priority to JP2008208309A priority patent/JP2009047413A/ja
Priority to DE102008044432A priority patent/DE102008044432A1/de
Priority to CH01305/08A priority patent/CH697802A2/de
Priority to CNA200810211066XA priority patent/CN101373069A/zh
Publication of US20090053054A1 publication Critical patent/US20090053054A1/en
Abandoned legal-status Critical Current

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    • 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
    • F23R3/002—Wall structures
    • 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
    • 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

Definitions

  • the disclosure relates generally to a venturi for a dry low nitric oxides (NOx) emissions combustor, and more particularly to a leakage reducing venturi for a dry low nitric oxides (NOx) emissions combustor.
  • NOx dry low nitric oxides
  • the riveted joints located at the venturi of current dry low nitric oxides (NOx) emissions combustor (DLN combustors) allow a variable air leakage into the combustion chamber.
  • This air leakage has been identified as a key contributor to combustion emissions, as well as combustor-to-combustor variation. Accordingly, a leakage reducing means for associating the venturi with the liner of DLN combustors would be desirable.
  • a leakage reducing venturi for a dry low nitric oxides (NOx) emissions combustor including a substantially annular outer liner, a substantially annular inner liner, a venturi channel defined by the annular inner liner and the annular outer liner, the venturi channel including a forward end and an aft end, a forward weld disposed in proximity to the forward end of the venturi channel, the forward weld being configured to connect the annular outer liner with the annular inner liner, and an aft weld disposed in proximity to the aft end of the venturi channel, the aft weld being configured to connect the annular outer liner with the annular inner liner.
  • NOx dry low nitric oxides
  • FIG. 1 is a simplified representation of a cross section of a combustor including an exemplary embodiment of a leakage reducing venturi
  • FIG. 2 is a simplified cross section of the leakage reducing venturi of the combustor of FIG. 2 .
  • a portion of a dry low nitric oxides (NOx) emissions combustor 10 (“dry low NOx” meaning less than 9 ppm NOx) for a gas turbine is illustrated.
  • the combustor 10 includes generally a combustion chamber 12 , fuel nozzles 14 (some gas turbines, as illustrated here, employ multiple nozzles in each combustor), an annual premixing chamber 16 , and a leakage reducing venturi 18 (the venturi being described in greater detail below).
  • a turbine compressor (which is not shown) provides airflow into the premixing chamber 16 .
  • Fuel 20 is provided to the chamber 16 via the fuel nozzles 14 , which are controlled a fuel flow controller 26 . Air is introduced to the chamber 16 via one or more entry ports 28 .
  • the combustion chamber 12 is generally cylindrical in shape about a combustor centerline 30 , and is enclosed by a wall 32 and a parent liner or wall 34 .
  • the fuel-air mix that enters the combustion chamber 12 from the premixing chamber 16 travels in a downstream direction, as indicated by arrows 36 .
  • the fuel-air mix is constricted by convergent/divergent walls 38 and 40 of the venturi 18 .
  • the flow re-circulation introduced by the venturi 18 acts as a bluff body flame holder. This causes the fuel-air mix to accelerate into the combustion chamber 12 , where it will combust and create enormous amounts of heat flux on the venturi 18 .
  • the leakage reducing venturi 18 includes a substantially annular outer liner 42 , a substantially annular inner liner 44 , which are integrated into the parent liner 34 of the combustor 10 .
  • the outer liner 42 and inner liner 44 define a venturi channel 46 , which includes a forward end 48 and an aft end 50 .
  • the venturi channel 46 is designed to ingest cooling air (compressed air) through inlets 51 that are disposed in the outer liner 44 , and in fluid communication with the venturi channel 46 . This cooling/compressed air is provided by the turbine compressor (which is not illustrated), and creates a cooling effect on the venturi 18 .
  • venturi 18 is defined to include the extents of the venturi channel 46 (i.e. the forward end 48 of the channel 46 to aft end 50 of the channel 46 ) as illustrated in FIGS. 1 and 2 .
  • the venturi 18 also includes a forward weld 52 and an aft weld 54 .
  • the forward weld 52 is disposed at the forward end 48 of the venturi channel 46 , such that a forward extent of the channel 46 terminates at the forward weld 52 .
  • the aft weld 54 is disposed at the aft end 50 of the venturi channel 46 , such that and aft extent the channel 46 terminates at the forward weld 52 .
  • the forward weld 52 and aft weld 54 are disposed at opposite ends of the venturi channel 46 .
  • both the forward weld 52 and aft weld 54 connect the annular outer liner 42 with the annular inner liner 44 .
  • the forward weld 52 and aft weld 54 provide these connections via a welding of the inner annular liner 42 and outer annular liner 44 to a forward y-joint 60 and aft y-joint 62 respectively.
  • the y-joints 60 and 62 allow for a continuous leak free path in the channel 46 , which minimizes air leakage through venturi joints, provides a cavity for impingement cooling, and allows the venturi 18 to be constructed with acceptable stresses.
  • these y-joints 60 and 62 include a generally “y” like shape, which includes three prongs 70 , 72 , and 74 .
  • Prongs 70 and 72 connect the joints 60 and 62 to the two walls of the channel 46 (via welds 52 and 54 ), while prong 74 connects each joint 60 and 62 to the parent liner 34 .
  • Associating the venturi 18 with the parent liner 34 of the combustor 10 via these forward and aft welds 52 and 54 (and y-joints 60 and 62 ) renders any riveted venturi joints unnecessary, and minimizes air leakage variation from combustor to combustor. This welding thus reduces emissions causing leakage into the combustion chamber 12 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
US11/841,053 2007-08-20 2007-08-20 LEAKAGE REDUCING VENTURI FOR DRY LOW NITRIC OXIDES (NOx) COMBUSTORS Abandoned US20090053054A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US11/841,053 US20090053054A1 (en) 2007-08-20 2007-08-20 LEAKAGE REDUCING VENTURI FOR DRY LOW NITRIC OXIDES (NOx) COMBUSTORS
JP2008208309A JP2009047413A (ja) 2007-08-20 2008-08-13 乾式低窒素酸化物（ＮＯｘ）燃焼器用の漏れ低減ベンチュリ
DE102008044432A DE102008044432A1 (de) 2007-08-20 2008-08-14 Leckagen reduzierende Venturidüse für trocken betriebene stickstoffarme Brennkammern
CH01305/08A CH697802A2 (de) 2007-08-20 2008-08-18 Leckagen reduzierendes Venturi-Rohr für trockene Stickoxid-(NOx)-Niedrigemissions-Brenner.
CNA200810211066XA CN101373069A (zh) 2007-08-20 2008-08-20 用于干式低氮氧化物(NOx)燃烧器的减漏文丘里管

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/841,053 US20090053054A1 (en) 2007-08-20 2007-08-20 LEAKAGE REDUCING VENTURI FOR DRY LOW NITRIC OXIDES (NOx) COMBUSTORS

Publications (1)

Publication Number Publication Date
US20090053054A1 true US20090053054A1 (en) 2009-02-26

Family

ID=40280466

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/841,053 Abandoned US20090053054A1 (en) 2007-08-20 2007-08-20 LEAKAGE REDUCING VENTURI FOR DRY LOW NITRIC OXIDES (NOx) COMBUSTORS

Country Status (5)

Country Link
US (1) US20090053054A1 (de)
JP (1) JP2009047413A (de)
CN (1) CN101373069A (de)
CH (1) CH697802A2 (de)
DE (1) DE102008044432A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110203287A1 (en) * 2010-02-19 2011-08-25 Ronald James Chila Combustor liner for a turbine engine
US20110214428A1 (en) * 2010-03-02 2011-09-08 General Electric Company Hybrid venturi cooling system
US20130000312A1 (en) * 2011-06-30 2013-01-03 General Electric Company Turbomachine combustor assembly including a vortex modification system
US20130091847A1 (en) * 2011-10-13 2013-04-18 General Electric Company Combustor liner
US20130180252A1 (en) * 2012-01-18 2013-07-18 General Electric Company Combustor assembly with impingement sleeve holes and turbulators
US10995956B2 (en) 2016-03-29 2021-05-04 Mitsubishi Power, Ltd. Combustor and method for improving combustor performance
US11747019B1 (en) 2022-09-02 2023-09-05 General Electric Company Aerodynamic combustor liner design for emissions reductions
US11788724B1 (en) 2022-09-02 2023-10-17 General Electric Company Acoustic damper for combustor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326041A (en) * 1965-04-14 1967-06-20 Zink Co John Apparatus for developing differential pressures in a conduit line
US4413477A (en) * 1980-12-29 1983-11-08 General Electric Company Liner assembly for gas turbine combustor
US5319935A (en) * 1990-10-23 1994-06-14 Rolls-Royce Plc Staged gas turbine combustion chamber with counter swirling arrays of radial vanes having interjacent fuel injection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326041A (en) * 1965-04-14 1967-06-20 Zink Co John Apparatus for developing differential pressures in a conduit line
US4413477A (en) * 1980-12-29 1983-11-08 General Electric Company Liner assembly for gas turbine combustor
US5319935A (en) * 1990-10-23 1994-06-14 Rolls-Royce Plc Staged gas turbine combustion chamber with counter swirling arrays of radial vanes having interjacent fuel injection

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110203287A1 (en) * 2010-02-19 2011-08-25 Ronald James Chila Combustor liner for a turbine engine
US8646277B2 (en) * 2010-02-19 2014-02-11 General Electric Company Combustor liner for a turbine engine with venturi and air deflector
US20110214428A1 (en) * 2010-03-02 2011-09-08 General Electric Company Hybrid venturi cooling system
US20130000312A1 (en) * 2011-06-30 2013-01-03 General Electric Company Turbomachine combustor assembly including a vortex modification system
US8904802B2 (en) * 2011-06-30 2014-12-09 General Electric Company Turbomachine combustor assembly including a vortex modification system
US20130091847A1 (en) * 2011-10-13 2013-04-18 General Electric Company Combustor liner
US20130180252A1 (en) * 2012-01-18 2013-07-18 General Electric Company Combustor assembly with impingement sleeve holes and turbulators
US10995956B2 (en) 2016-03-29 2021-05-04 Mitsubishi Power, Ltd. Combustor and method for improving combustor performance
US11747019B1 (en) 2022-09-02 2023-09-05 General Electric Company Aerodynamic combustor liner design for emissions reductions
US11788724B1 (en) 2022-09-02 2023-10-17 General Electric Company Acoustic damper for combustor

Also Published As

Publication number Publication date
JP2009047413A (ja) 2009-03-05
CH697802A2 (de) 2009-02-27
DE102008044432A1 (de) 2009-02-26
CN101373069A (zh) 2009-02-25

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AS Assignment

Owner name: GENERAL ELECTRIC COMPANY, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GROOMS, NEAL WILLIAM;LEBEGUE, JEFFREY SCOTT;SIMONS, DERRICK WALTER;REEL/FRAME:019715/0884;SIGNING DATES FROM 20070814 TO 20070815

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION