Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3859786 A
Publication typeGrant
Publication dateJan 14, 1975
Filing dateMay 25, 1972
Priority dateMay 25, 1972
Also published asCA982829A, CA982829A1, DE2326302A1, DE2326302C2
Publication numberUS 3859786 A, US 3859786A, US-A-3859786, US3859786 A, US3859786A
InventorsAzelborn Nicolas Alan, Errante Joseph, Paluszny Antoni
Original AssigneeFord Motor Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 3859786 A
A three-chamber assembly is used for the control of combustion in a gas turbine engine having a conventional supply of fuel and compressed air. Uniform, homogeneous mixing, preferably on a molecular level, takes place in a first chamber, combustion in the second with restriction of the combustion flame thereto, and quenching in the third chamber. Vortex flow is utilized in one or more of the chambers. The combustion temperature is lowered without sacrifice of combustion efficiency to provide control of undesirable exhaust emissions.
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

flit ttes atent Azelborn et a1.

[ Jan. 114, 1975 CGMBUSTOR Inventors: Nicolas Alan Azelborn, Ypsilanti;

Joseph Errante, Dearborn; Antoni lPaluszny, Ann Arbor, all of Mich.

Ford Motor Company, Dearborn, Mich.

Filed: May 25, 1972 Appl. No.: 256,883


Int. Cl F020 7/22, F23d 11/44, F230 5/18 Field of Search 60/39.65, 39.71, 39.74 R, 60/39.69, 39.11; 431/173, 353

References Cited UNITED STATES PATENTS 12/1952 Powter et a1 60/39.23

4/1953 Havemann 6/1958 Schirmer 4/1962 Johnson 60/39.65

3,293,852 12/1966 Galli et al. 60/264 X 3,570,242 3/1971 Leonardi et all 60/39.74 R 3,593,518 I 7/1971 Gerrard 60/39.23 X 3,691,762 9/1972 Ryberg et al. 60/3965 X Primary ExaminerCarlt0n R. Croyle Assistant Examiner-Robert E. Garrett Attorney, Agent, or Firm-Joseph W. Malleck; Keith L. Zerschling [57] ABSTRACT A three-chamber assembly is used for the control of combustion in a gas turbine engine having a conventional supply of fuel and compressed air. Uniform, homogeneous mixing, preferably on a molecular level, takes place in a first chamber, combustion in the sec ond with restriction of the combustion flame thereto, and quenching in the third chamber. Vortex flow is utilized in one or more of the chambers. The combustion temperature is lowered without sacrifice of combustion efficiency to provide control of undesirable exhaust emissions.

1 Claim, 3 Drawing Figures PATENTED JAN 1 M975 SHEET 10F 2 PATENTEB JAN 1 4 I975 SEEM 2 BF 2 COMBUSTOR BACKGROUND OF THE INVENTION Continuing studies have indicated that nitrogen oxide emissions from gas turbine engines remains relatively high if the temperature of combustion is allowed to remain relatively high. However, the same studies have shown that the expedient of reducing the combustion temperature by limiting the fuel input rate undesirably lowers overall combustion efficiency. Other efforts have been solely directed at quickly reducing the temperature of generated combustion products to inhibit nitrogen oxide, but have met with only a limited degree of success. Accordingly, there is a need for an improved chamber assembly which can maintain combustion efficiency at a high level while at the same time reducing the emission of nitrogen oxides to a negligible level.

Vortex combustor designs have been given serious consideration because of the promise of increased combustion efficiency over a wide range of operating conditions experienced in production vehicles. Although the vortex combustor design is known, its operating characteristics will be briefly reviewed to provide for a full understanding of the'improvements taught by the invention herein. A typical vortex combustor has compressed air supplied in a direction tangentially to a typical cylindrical chamber closed at one end, the pressure energy being converted into a tangential velocity as the body of gas swirls about the interior thereof gradually decreasing its swirling radius. The gases finally flow out through the open end near the axis of the swirling vortex. The moving gases within the vortex chamber can be discriminated: a natural vortex is generally disposed near the peripheral interior area of the chamber where the components of the gaseous mixture, such as fuel and air, experience a relative motion therebetween; another vortex body, commonly referred to as forced, occurs at the axial region of the chamber and rotates like a solid gaseous cylinder having no relative motion between the fuel and air. It is known that the mixture within the forced vortex can be easily ignited and produces a very stable rotating columnar flame.

The relative motion between the gaseous elements of the natural vortex is both advantageous and disadvantageous. One of the more important advantages is the inducement of greater mixing between fuel and air promoting increased efficiency of combustion for which the vortex combustor design is generally known. The mode of mixing occurs because the tangential velocity distribution along the radial direction takes a hyperbolic form. Thus any hypothetical lump of gaseous fuel is subject to different shear forces at the different radii of the lump and deforms into a stretched ligament which ultimately atomizes into finer particles. This mode of mixing is not present in the forced vortex because the tangential velocity distribution is to the contrary and is linear. In a single vortex chamber, the natural vortex begins to promote uniform homogeneity, but cannot do so to satisfactory levels because of the momentary time dwell of the mixture therethrough before being combusted.

One of the disadvantages of the vortex combustor is the inability for the combustion flame to proceed smoothly from the forced vortex into the natural vortex while remaining stable and totally within the combustion chamber. This disadvantage can be overcome to some degree by critically maintaining the air/fuel input ratio within a very narrow range. This limitation prevents the vortex combustor from achieving practical utility under its promise of higher combustion efficiency. Accordingljgthere is a need for overcoming the deficiencies of a vortex combustor in such characteristics as limited operating efficiency and need for further reduction of nitrogen oxides without hindering its relatively trouble-free construction.

As to mechanisms utilized by the art to lower per se the emission content of combustion products, independent downstream quenching has been used in the hopes that this alone would serve to prevent the formation of undesirable nitrogen oxides. Although this has helped to some limited degree, it has not totally solved the fundamental problem of the initial formation of the nitrogen oxide compounds.

SUMMARY OF THE INVENTION To accommodate the problem of this invention, the invention has a three-fold aspect wherein there is first a discovery that a more homogeneous intimate mixture must be provided between the vaporized fuel and air thereby preventing nonuniform combustion temperatures from occurring within the combustion chamber, and particularly pockets of combustion at elevated temperatures above 3,000F which lead to immediate formation of nitrogen oxides. The temperature of combustion is related to the air/fuel ratio within the combustable mixture, and therefore, if the mixture is nonuniform, the uncontrolled and undesirable portions of the mixture will produce a high content of nitrogen oxide.

The second aspect or discovery is that the mixing capability of the natural vortex within the combustion chamber is not sufficient by itself to provide for the homogeneous uniform mixture required for appropriate combustion, but that it can be used to augment and complement this function while additionally serving to stabilize the combustion flame and act as insurance that combustion will not take place outside the preferred combustion zone.

Relatively restrictive exit orifices have been used with vortex combustor chambers for the purpose of co operating with the vortex flow to provide stability. As a third aspect or discovery of this invention, the size of the orifice has been found to be expandable by control ling the strength of the natural vortex for promoting combustor gas recirculation to sustain combustion and controlling the downstream quenching medium in the form of a circulating vortex which restricts the propagation of flaming combustion.

Construction features which implement the above inventive aspects comprise the novel use of a threechamber assembly for the combustor unit, the first chamber providing for controlled turbulence to intimately and homogeneously vaporize and mix fuel and air, a second chamber for actual combustion utilizing the vortex principle for additional controlled turbulence to insure final atomization of the mixture, and a third chamber for quenching also using controlled turbulence. The mixing chamber is constructed with consideration not only to the dynamics of the flow therein but also to the time dwell therein. Communicating means is constructed between chambers so that flame propagation back into the mixing chamber is prevented, as well as prevention of propagation into the quenching chamber.

SUMMARY OF THE DRAWINGS FIG. 1 is a central sectional view of a chamber assembly of this invention showing also the fuel and air supply as well as the ignition system.

FIG. 2 is a partial sectional view taken along line 2-2 of FIG. 1; and

FIG. 3 is substantially a schematic illustration of an alternative embodiment.

DETAILED DESCRIPTION Referring to the drawings, the preferred embodiment of the chamber assembly of this invention is illustrated in FIGS. 1 and 2 having a plurality of chambers A, B, C interconnected, the most forward or upstream chamber A providing for mixing of the charge elements, the middle chamber B providing for combustion and lastly the exit chamber C (which is ultimately connected to the turbine of the engine) provides for cooling and general quenching of the combustion products.

More particularly the mixing chamber A has a skirt portion 1 which envelopes the combustion chamber B and a forward portion 2 which is reduced in section or necked to define a central entry zone to the mixing chamber. As best viewed in FIG. 2, the skirt portion is defined by an outer sheet metal wall 3 spaced a radial distance 4 from a cylindrical sheet metal stamping 5 provided with flanges 6 extending from the edges 7 defining circumferentially spaced openings 8 therein. The openings 8 constitute an outlet for the mixing chamber and further cooperate as a specialized communicating means to the combustion chamber as later described. As best viewed in FIG. I, a dish-shaped wall 9 extends across and is commensurate with the left-hand opening of the sheet metal stamping 5; the convex surface 10 of the wall serves as a diverter in regulating the flow within the mixing chamber. The upstream end of the sheet metal cylindrical wall 3 is reduced in diameter to define portion 2 and has an interior contour ll effective to stimulate turbulence in cooperation with other interior walls of the mixing chamber. The necked portion is closed by member 12 having a central axial sleeve 13 (taken relative to the axis 14 of flow of the entire assembly) through which a fuel injection nozzle 15 extends for introduction of liquid fuel in droplet form or the equivalent. The nozzle is supported by biased ring assembly 15a movable against a seat 13a of the sleeve 13. An air inlet 16 is provided in said member 12 and is defined by annular vaned assembly 16a surrounding the fuel injection nozzle 15.

Turning now in particularity to the combustion chamber B, it is comprised of a ceramic cylinder 17 having a smooth interior cylindrical wall 18 with an axis aligned with the general axis 14 of the assembly; the upstream or left hand portion of the. ceramic cylinder is closed by dome wall 19 having a convex surface 19a effective to cooperate with the vortical flow therein. A plurality of openings or slots 20 are defined in the cylindrical wall 18 at spaced circumferential positions and are generally aligned with the axis of the chamber. Each opening 20 constitutes an inlet for the combustor chamber and each has sidewalls 20a aligned with a chord 21 of the interior diameter of the chamber (best viewed in FIG. 2). The interior surface 6a of flanges 6 carried by the previously noted stamping 5 constitute extensions of the slot walls 20a defining a communicating means (I so D the gaseous mixture, being introduced therethrough, is given a tangential velocity or guidance within the combustor chamber promoting a swirling or vortex flow pattern. The distance between walls of a single slot may occupy an arc of approximately 10 to 12 and each slot is preferably aligned at an angle of about 65 relative to a radius 22 of the chamber. Slots 20 have a longitudinal extent substantially commensurate with the length of the combustor chamber. The combustor chamber has a single outlet 23 defined by an annular wall 23a projecting inwardly from the interior wall 18 in a general direction perpendicular to the axis 14. The central circular opening 24 in the wall 23a defined by edge 23b a control orifice whereby gaseous elements can be compressed and then rapidly expanded upon passage through the orifice, such flow control accelerating the particles of the gaseous mixtures so that there is a release from the combustor chamber at a velocity above that which would allow the flame to follow.

Although the interior configuration of the quenching chamber C can take a variety of forms, including a generally flared configuration, the preferred embodiment utilizes a cylindrical wall 25 formed integrally as a ceramic extension of cylinder 17 and has a diameter somewhat larger than the interior diameter of the com bustion chamber. Wall 25 is smoothly connected with the annular wall 23a (defining said orifice) by an interior shoulder 26. The entire ceramic unit constituting the combustor and exhaust chambers is supported in an outer housing 28 which also serves to define a flow passage 29 for secondary air received from a common compressor source 30 which enters the housing at locations in the upstream portion of the housing to provide also for primary air. The incoming air is divided between the inlet 16 to the mixing chamber and the passage 29. In passage 29, air passes along between the sheet metal cylindrical wall 3 and housing 28 to enter through inlet 31 having a plurality of openings 31a circumferentially arranged about and in the wall 25 of the exhaust chamber and thereby defining a communicating means E in conjunction with outlet 23. To vary the division of compressed air flowing between the inlet 16 to the mixing chamber and inlet 31 to the exhaust chamber, a variable control mechanism 33 may be employed which varies the size of the openings 31a. A suitable mechanism here comprises a slidable sleeve 34 actuated by elements 35 for movement along the axis 14 of the unit.

In operation, air (compressed to approximately four atmospheres and having a temperature of approximately 1,000F) is conveyed to the housing 28 of the combustor unit. Such compressed air divides preferentially between inlet 16 and passage 29, that entering inlet 16 is immediately guided into a toroidal swirl resulting from conversion of the pressure. energy into a tangential velocity component creating a controlled turbulent flow pattern with flow impinging against the interior surfaces 10 and II of the mixing chamber. The secondary division of the air supply moves along the interior of housing 28 and enters the exhaust chamber by way of circumferentially arranged inlet openings 3111.

In the primary air flow of the mixing chamber, liquid fuel is disbursed by the fuel nozzle 15 and is quickly vaporized and stimulated to mix on a molecular level,

being afforded a sufficient time dwell to accomplish improved diffusion of the atomic elements of air into the atomic elements of the vaporized fuel. The time dwell is promoted by having the flow path between the inlet 16 and outlet 8 of an irregular non'laminar character whereby flow is not only turbulent but tortuous to promote homogeneity. Upon passing through the communicating means D into the combustion chamber, the intimate mixture of fuel and air achieves further homogeneity and ultimately attains desired uniformity by supplementary making of the natural vortex within the combustor chamber B.

In conventional gas turbine systems the air/fuel ratio, at the point of combustion, is approximately :1 when supporting optimum combustion efficiency. This invention contemplates maintaining air/fuel ratios on the order of 40:1 (and in some practical applications about 44:1) in a substantially uniform homogeneous condition throughout the entire mixture ultimately com busted. Experiments have shown that very peak combustion efficiency of a vortex combustor is attained at air/fuel ratios between :1 and :1. However, this invention optimizes emission control of nitrogen oxides by use of a higher but limited air/fuel ratio to maintain the combustion temperature at a level at or below 2,800F and preferably about 2,000F. This is accomplished with only a slight drop in efficiency from that obtained at the peak ratios between 25:1 and 30:1.

With the intimate homogeneous mixture and im' proved air/fuel ratio, the combustion flame will appear as a glow throughout the entire combustor chamber when ignited by suitable ignition means, here shown as an ignitor element F disposed near the interior periphery of the combustor chamber. Propagation of the flame back through the communicating means D is prevented by controlling the flow of gaseous mixture so that it is at a higher rate than the back propagation rate of the flame. Such flow can be varied to attain this objective by regulating the division between primary and secondary flow as mentioned earlier.

Similarily the orifice defined by the outlet 23 from the combustor chamber functions to compress and expand the combustion products so as to accelerate the particles thereof in a manner to release and exit from the chamber at a velocity considerably higher than the propagation rate of the flame within combustor chamber and such constriction secondarily serves to guide and stimulate the formation of the natural vortex, again supporting supplementary mixing within the combustor chamber.

To illustrate the equivalence to which the inventive features should be entitled, an alternative embodiment is illustrated in FIG. 3 wherein the internal flow within the mixing chamber provides an aerodynamic dome for the combustor chamber which lacks a positive mechanical wall at the conventional end where a dome wall normally occurs. The aerodynamic dome is created by the formation of the very strong vortical flow within the mixing chamber. This can be obtained by providing the necked portion 36 of the mixing chamber A with a plurality of inlet ports 37 which provide a tangential component to the entering primary air substantially throughout a greater area than that obtained with the swirl vanes of the preferred embodiment. This particular design increases the degree of turbulence in chamber A and provides a more direct flow path into the combustor chamber B thereby eliminating possibilities of super heated sheet metal elements. Ignition can be accomplished by an element 46 disposed centrally in chamber A, but combustion is restricted to chamber B by controlling of primary air in excess of the rate of back propagation of the flame.

Instead of using primary air for stimulating the vortex flow pattern in the combustor chamber B, secondary air is employed passing along the exterior of the ce ramic unit 41 (defining all the chambers) and housing 28. Secondary air is introduced by a plurality of circular openings 38 in the outer wall 39 of the combustor chamber B. The flow through openings 38 serves to stimulate and maintain a vortex flow comparable in lesser degree to that contained in the preferred embodiment, keeping in mind that the primary flow enters at 42 with a previously imparted vortical flow pattern.

In the embodiment of FIG. 3, the mechanical orifice controlling the release of combustion products in the combustor chamber is eliminated and the flow pattern of the combustor vortex is utilized as a aerodynamic" orifice 43 or control whereby gaseous products of combustion are released only upon having entered the forced vortex region 40 of the combustor chamber and are accelerated to leave at a velocity in excess of that flame propagation. The aerodynamic orifice 43 can be implemented by tangentially directing a strong secondary air flow through slots 44 adjacent the orifice 43 location.

Although not shown, a third flow of secondary air can be utilized for quenching purposes downstream from orifice 43 of the combustion region B and can be introduced through slot openings 45 creating a swirl therein.

We claim as our invention:

1. A chamber assembly for use in a continuous combustion process effective to provide low NO emissions, comprising:

a mixing chamber having an inlet, an outlet and means interposed between said inlet and outlet for directing a non-laminar controlled turbulent flow of compressed air therethrough,

fuel supply means for continuously adding fuel to said flow in said mixing chamber at a location adjacent to said inlet and at a rate to provide for a substantially homogeneous gaseous air/fuel mixture passing through said outlet,

a combustor chamber in communication with the outlet of said mixing chamber for continuously passing said air/fuel mixture therethrough and having a path for said mixture which is significantly longer than the path of said mixture through said mixing chamber,

ignition means effective to ignite said mixture for sus tained flaming combustion in said combustor chamber,

means for tangentially introducing a flow of compressed air into said combustion chamber for inducing vortical flow therein,

said induced vortical flow being effective to define an aerodynamic orifice for effecting accelerated release of combustion products from said combustor chamber, and

means for introducing a vortical flow of quenching medium into said exhaust gases from said combus-

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2621477 *Oct 10, 1949Dec 16, 1952Power Jets Res & Dev LtdCombustion apparatus having valve controlled passages for preheating the fuel-air mixture
US2635564 *Oct 3, 1949Apr 21, 1953Power Jets Res & Dev LtdCombustion system for pulverulent fuel
US2837893 *Dec 12, 1952Jun 10, 1958Phillips Petroleum CoAutomatic primary and secondary air flow regulation for gas turbine combustion chamber
US3030773 *Jan 22, 1959Apr 24, 1962Gen ElectricVortex type combustion with means for supplying secondary air
US3293852 *Mar 19, 1963Dec 27, 1966Boeing CoPlasma propulsion method and means
US3570242 *Apr 20, 1970Mar 16, 1971United Aircraft CorpFuel premixing for smokeless jet engine main burner
US3593518 *Sep 17, 1969Jul 20, 1971Lucas Industries LtdCombustion chambers for gas turbine engines
US3691762 *Dec 4, 1970Sep 19, 1972Caterpillar Tractor CoCarbureted reactor combustion system for gas turbine engine
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3938324 *Dec 12, 1974Feb 17, 1976General Motors CorporationPremix combustor with flow constricting baffle between combustion and dilution zones
US3982392 *Jan 19, 1976Sep 28, 1976General Motors CorporationCombustion apparatus
US4012904 *Jul 17, 1975Mar 22, 1977Chrysler CorporationGas turbine burner
US4045159 *Jul 30, 1975Aug 30, 1977Mitsubishi Denki Kabushiki KaishaCombustion apparatus
US4054028 *Aug 28, 1975Oct 18, 1977Mitsubishi Jukogyo Kabushiki KaishaFuel combustion apparatus
US4067190 *Dec 10, 1976Jan 10, 1978Westinghouse Electric CorporationCatalytic gas turbine combustor with a fuel-air premix chamber
US4078377 *Jan 28, 1974Mar 14, 1978Ford Motor CompanyInternally vaporizing low emission combustor
US4084371 *Jul 21, 1976Apr 18, 1978Howald Werner ECombustion apparatus including an air-fuel premixing chamber
US4094142 *Sep 20, 1976Jun 13, 1978Engelhard Minerals & Chemicals Corp.Turbine system method and apparatus
US4120640 *Feb 18, 1977Oct 17, 1978Infern-O-Therm CorporationBurner for liquid fuel
US4151711 *Jun 24, 1977May 1, 1979Phillips Petroleum CompanyCombustors provided with variable dome valves
US4171612 *Jun 6, 1977Oct 23, 1979Zwick Eugene BLow emission burner construction
US4187674 *Jan 18, 1978Feb 12, 1980Rolls-Royce LimitedCombustion equipment for gas turbine engines
US4192139 *Jul 1, 1977Mar 11, 1980Volkswagenwerk AktiengesellschaftCombustion chamber for gas turbines
US4255136 *Feb 13, 1980Mar 10, 1981Tokyo Shibaura Electric Co., Ltd.Furnace for heat treatment of wire materials
US4385490 *Dec 23, 1980May 31, 1983Phillips Petroleum CompanyCombustors and methods of operating same
US4498287 *Sep 29, 1982Feb 12, 1985Phillips Petroleum CompanyCombustors and methods of operating same
US4563875 *Mar 21, 1985Jan 14, 1986Howald Werner ECombustion apparatus including an air-fuel premixing chamber
US4586328 *May 11, 1982May 6, 1986Howald Werner ECombustion apparatus including an air-fuel premixing chamber
US4590769 *Jan 12, 1981May 27, 1986United Technologies CorporationHigh-performance burner construction
US4702073 *Mar 10, 1986Oct 27, 1987Melconian Jerry OVariable residence time vortex combustor
US4845940 *Oct 28, 1987Jul 11, 1989Westinghouse Electric Corp.Low NOx rich-lean combustor especially useful in gas turbines
US5185541 *Dec 2, 1991Feb 9, 199321St Century Power & Light CorporationGas turbine for converting fuel to electrical and mechanical energy
US5209187 *Aug 1, 1991May 11, 1993Institute Of Gas TechnologyLow pollutant - emission, high efficiency cyclonic burner for firetube boilers and heaters
US5220888 *May 27, 1992Jun 22, 1993Institute Of Gas TechnologyCyclonic combustion
US5285628 *Jan 18, 1990Feb 15, 1994Donlee Technologies, Inc.Method of combustion and combustion apparatus to minimize Nox and CO emissions from a gas turbine
US5462430 *Jan 29, 1993Oct 31, 1995Institute Of Gas TechnologyProcess and apparatus for cyclonic combustion
US5557920 *Mar 30, 1995Sep 24, 1996Westinghouse Electric CorporationCombustor bypass system for a gas turbine
US5588826 *Aug 3, 1995Dec 31, 1996Abb Management AgBurner
US5601789 *Dec 15, 1994Feb 11, 1997W. R. Grace & Co.-Conn.Raw gas burner and process for burning oxygenic constituents in process gas
US5603211 *Aug 31, 1994Feb 18, 1997United Technologies CorporationOuter shear layer swirl mixer for a combustor
US5832732 *Jun 12, 1996Nov 10, 1998Abb Research Ltd.Combustion chamber with air injector systems formed as a continuation of the combustor cooling passages
US6019596 *Nov 17, 1998Feb 1, 2000Abb Research Ltd.Burner for operating a heat generator
US6240731 *Dec 31, 1997Jun 5, 2001United Technologies CorporationLow NOx combustor for gas turbine engine
US6729141 *Jul 3, 2002May 4, 2004Elliot Energy Systems, Inc.Microturbine with auxiliary air tubes for NOx emission reduction
US7277801May 25, 2006Oct 2, 2007Southwest Research InstituteMethod for testing catalytic converter durability
US7347086Jan 6, 2006Mar 25, 2008Southwest Research InstituteSystem and method for burner-based accelerated aging of emissions control device, with engine cycle having cold start and warm up modes
US7412335Aug 12, 2004Aug 12, 2008Southwest Research InstituteComponent evaluations using non-engine based test system
US7617682Apr 30, 2004Nov 17, 2009Siemens Energy, Inc.Catalytic oxidation element for a gas turbine engine
US7748976Mar 16, 2006Jul 6, 2010Southwest Research InstituteUse of recirculated exhaust gas in a burner-based exhaust generation system for reduced fuel consumption and for cooling
US8425224Mar 16, 2006Apr 23, 2013Southwest Research InstituteMass air flow compensation for burner-based exhaust gas generation system
US8459985Sep 7, 2010Jun 11, 2013Alstom Technology LtdMethod and burner arrangement for the production of hot gas, and use of said method
US8468833 *Sep 7, 2010Jun 25, 2013Alstom Technology LtdBurner arrangement, and use of such a burner arrangement
US8475124Nov 13, 2007Jul 2, 2013General Electric CompanyExhaust hood for a turbine and methods of assembling the same
US8622737 *Jul 16, 2008Jan 7, 2014Robert S. BabingtonPerforated flame tube for a liquid fuel burner
US8745989 *Apr 9, 2009Jun 10, 2014Pratt & Whitney Canada Corp.Reverse flow ceramic matrix composite combustor
US9222674 *Jul 21, 2011Dec 29, 2015United Technologies CorporationMulti-stage amplification vortex mixture for gas turbine engine combustor
US9234659Dec 4, 2013Jan 12, 2016Robert S. BabingtonPerforated flame tube for liquid fuel burner
US9423130 *Apr 28, 2014Aug 23, 2016Pratt & Whitney Canada Corp.Reverse flow ceramic matrix composite combustor
US20040003599 *Jul 3, 2002Jan 8, 2004Ingram Joe BrittMicroturbine with auxiliary air tubes for NOx emission reduction
US20040007056 *Jun 10, 2003Jan 15, 2004Webb Cynthia C.Method for testing catalytic converter durability
US20050051155 *Aug 12, 2004Mar 10, 2005Tomlinson John L.Direct-fired, gas-fueled heater
US20050241313 *Apr 30, 2004Nov 3, 2005Siemens Westinghouse Power CorporationCatalytic oxidation element for a gas turbine engine
US20060201239 *May 25, 2006Sep 14, 2006Webb Cynthia CMethod for Testing Catalytic Converter Durability
US20060234174 *Mar 16, 2006Oct 19, 2006Southwest Research Institute.Use of recirculated exhaust gas in a burner-based exhaust generation system for reduced fuel consumption and for cooling
US20070039381 *Aug 4, 2006Feb 22, 2007Timmons Suzanne ASecondary Air Injector For Use With Exhaust Gas Simulation System
US20070283749 *Jan 6, 2006Dec 13, 2007Southwest Research InstituteSystem and method for burner-based accelerated aging of emissions control device, with engine cycle having cold start and warm up modes
US20080110172 *Apr 30, 2004May 15, 2008Siemens Westinghouse Power CorporationCatalytic oxidation element for a gas turbine engine
US20090123277 *Nov 13, 2007May 14, 2009Prakash DalsaniaExhaust hood for a turbine and methods of assembling the same
US20090158739 *Dec 19, 2008Jun 25, 2009Hans-Peter MessmerGas turbine systems and methods employing a vaporizable liquid delivery device
US20100015562 *Jul 16, 2008Jan 21, 2010Babington Robert SPerforated flame tube for a liquid fuel burner
US20100257864 *Apr 9, 2009Oct 14, 2010Pratt & Whitney Canada Corp.Reverse flow ceramic matrix composite combustor
US20110059408 *Sep 7, 2010Mar 10, 2011Alstom Technology LtdMethod and burner arrangement for the production of hot gas, and use of said method
US20110079014 *Sep 7, 2010Apr 7, 2011Alstom Technology LtdBurner arrangement, and use of such a burner arrangement
US20130019604 *Jul 21, 2011Jan 24, 2013Cunha Frank JMulti-stage amplification vortex mixture for gas turbine engine combustor
US20140053569 *Aug 23, 2013Feb 27, 2014Alstom Technology LtdMethod for mixing a dilution air in a sequential combustion system of a gas turbine
US20140311152 *Apr 28, 2014Oct 23, 2014Pratt & Whitney Canada Corp.Reverse flow ceramic matrix composite combustor
DE4232383A1 *Sep 26, 1992Mar 31, 1994Asea Brown BoveriGasturbogruppe
EP2549186A3 *Jul 19, 2012Aug 30, 2017United Technologies CorporationMulti-stage amplification vortex mixture for gas turbine engine combustor
U.S. Classification60/737, 431/353, 60/748, 431/173, 60/39.23, 60/755, 60/753
International ClassificationF23R3/00, F23L9/00, F23L9/02, F23R3/04, F23C99/00, F23R3/28, F23C6/04, F23C6/00, F23R3/26, F23R3/02, F23R3/12
Cooperative ClassificationF23R3/26, F23R3/12, F23R3/007
European ClassificationF23R3/00K, F23R3/12, F23R3/26