US20020152753A1 - Fuel mixing in a gas turbine engine - Google Patents

Fuel mixing in a gas turbine engine Download PDF

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Publication number
US20020152753A1
US20020152753A1 US09/161,104 US16110498D US2002152753A1 US 20020152753 A1 US20020152753 A1 US 20020152753A1 US 16110498 D US16110498 D US 16110498D US 2002152753 A1 US2002152753 A1 US 2002152753A1
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US
United States
Prior art keywords
combustor
fluid flow
inlet portion
blades
casing
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
US09/161,104
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English (en)
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US6460343B1 (en
Inventor
Anatoly Rakhmailov
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.)
ALM Development Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to ALM DEVELOPMENT, INC. reassignment ALM DEVELOPMENT, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RAKHMAILOV, ANATOLY
Publication of US20020152753A1 publication Critical patent/US20020152753A1/en
Granted legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/12—Cooling of plants
    • F02C7/16—Cooling of plants characterised by cooling medium
    • F02C7/18—Cooling of plants characterised by cooling medium the medium being gaseous, e.g. air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/06—Fluid supply conduits to nozzles or the like
    • F01D9/065—Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/08—Heating, heat-insulating or cooling means
    • F01D5/081—Cooling fluid being directed on the side of the rotor disc or at the roots of the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/023—Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
    • F04D27/0215—Arrangements therefor, e.g. bleed or by-pass valves
    • 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
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/54—Reverse-flow combustion chambers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the invention relates to the field of gas turbine engines, and more specifically, to an improved gas turbine engine using a rotating fluid flow train to feed the combustor and enhance air/fuel mixing and emissions.
  • a type of prior art gas turbine engine has a compressor, a fuel source, a combustion air source, a casing, and a combustor to prepare a heated fluid from fuel and combustion air.
  • the combustor is connected to the fuel source, the combustion air source and the compressor. Practically the entire fluid flow from the compressor is directed to the combustor.
  • the engine has a turbine rotor disk with blades that receive the heated fluid from the combustor. As the turbine rotor disk rotates during engine operation, the heated fluid flow coming from the combustor has to be directed at an angle to the blades to ensure smooth entry conditions.
  • the stator vane angle normally is chosen to accommodate the most optimum and prevailing turbine rotor disk operating conditions (speed). This solution is quite acceptable for gas turbine engines that have more or less stable operating conditions, such as when used for power generation. In applications where the load upon the gas turbine engine is steady, the turbine rotor disk rotates at a stable speed, and the entry angle for the blades remains unchanged thus minimizing losses. If, on the other hand, this gas turbine engine is used to power a vehicle, the situation is radically different. In that application, the turbine rotor disk speed will vary within a broad range depending on vehicle load. Consequently, the entry angle also varies within a broad range under load fluctuations, which leads to greater losses. This problem could not be solved by using the conventional approach with the stator vanes.
  • controllable stator vanes it is possible to use controllable stator vanes to change the entry angle at the blades, but it is a very complicated and expensive solution given the high temperatures downstream of the combustor and space limitations. As a result, the gas turbine engine would have high losses in vehicle applications. Moreover, the stator and vanes occupies an additional space and makes the engine design more complicated and expensive. The use of controllable vanes makes the engine less reliable.
  • Another object of the invention is to provide a more compact gas turbine engine that has a simpler design.
  • Another object of the invention is to improve the emission characteristics of the gas turbine engine.
  • a gas turbine engine has a device to admit a rotating fluid flow from an annular space in the casing to the inlet portion of a combustor to form a rotating fluid flow in the inlet portion of the combustor.
  • the rotating fluid flow is formed in the annular space of the casing by supplying a fluid from a compressor to the blades of the turbine rotor disk.
  • FIG. 1 shows a diagrammatic view of a gas turbine engine according to the invention.
  • FIG. 2 is a sectional view of an embodiment of the annular space (Leonid to supply a sketch.)
  • a gas turbine engine has a casing 10 , a compressor 12 for supplying a compressed fluid, a turbine rotor disk 14 mounted downstream of compressor 12 installed on the turbine rotor, a combustor 16 to prepare a heated fluid to be supplied to turbine rotor disk 14 .
  • Combustor 16 has a port 18 to admit fuel supplied from a fuel source (not shown).
  • Combustor 16 defines a combustion zone 20 in which the heated fluid is formed.
  • Combustion air is supplied from an air source (not shown) as shown by arrows A to an inlet portion of the combustor in which port 18 is provided.
  • the inlet portion of the combustor shown at 19 is defined by an inner annular wall 22 of combustor 16 and by an annular guide wall 24 that extends within the combustor in a spaced relation to annular inner wall 22 .
  • Annular guide wall 24 is installed by brackets 26 in such a manner that a space 28 is left for fluid passage.
  • a part of the fluid from compressor 12 is supplied to turbine rotor disk 14 , bypassing combustor 16 , as shown by arrows B, through passage 30 in casing 10 and reaching a zone 32 upstream of turbine rotor disk 14 .
  • Vanes 34 can be provided in passage 30 to make this fluid flow compatible with the turbine rotor disk 14 rotation. These vanes will function in an optimum manner only under certain turbine engine operating conditions. Since the quantity of fluid that is fed to the turbine rotor disk 14 and the velocity of this fluid are not very high, losses that would occur under non-optimum conditions would be relatively low. This fluid is admitted to turbine rotor disk 14 and envelops the blades 15 .
  • the fluid from the compressor 12 passes through a passage 36 of the blade 15 and leaves the passage 36 to reach an annular space 38 that is defined in casing 10 and surrounds blades 15 .
  • the fluid from the compressor 12 leaves blade passage 36 having obtained a rotation that forms a rotating fluid flow in annular space 38 .
  • This rotating fluid flow is admitted through space 28 to inlet portion 19 of combustor 16 to form a rotating fluid flow there.
  • fuel is fed through port 18 , it is entrained in a rotary motion by the rotating fluid flow in the inlet portion, and intense stirring and mixing of fuel and fluid will take place to prepare a good quality fuel mixture.
  • the rotating fluid flow entrains air that is fed as shown by arrow A, moves into combustion zone 20 , and imparts a spin to the heated fluid when it is formed in combustion zone 20 .
  • the direction of this rotating flow is the same as the turbine rotor disk direction of rotation and the velocity of this rotating flow steadily follows turbine rotor disk 14 rotation velocity (with a very short lag).
  • the heated fluid formed in combustor 16 will move to the turbine blades 15 in a manner that is almost entirely compatible with rotation of the turbine rotor disk. Consequently, losses in this zone, which account for most of the losses in the turbine flow duct, are minimized.
  • Another advantage of the invention is that the fluid from the compressor that goes through passage 36 and reaches blade 15 cools the blade and the adjacent wall of casing 10 .
  • Another advantage of the invention is the method of preparation of the fuel mixture.
  • the quantity of fuel supplied for small-power gas turbine engines is rather low. It is very difficult to prepare a homogeneous fuel mixture with a ratio of fuel to air and fluid of 1:15 to 1:30.
  • the fuel mixing method that is used here solves this problem. When fuel is entrained in a rotary motion by the rotating fluid flow admitted to the inlet portion of the combustor, fuel atomizing, mixing and stirring in the rotating flow are very thorough and intensive. This thoroughness assures a high degree of homogeneity of the fuel mixture.
  • FIG. 2 shows an embodiment of the space 28 with annular guide walls 24 attached by brackets 26 .
  • This space 28 can take the form of an arc slit cut in a flanged portion of the annular guide wall or in the form of spaces between the adjacent brackets (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US09/161,104 1998-09-25 1998-09-25 Fuel mixing in a gas turbine engine Granted US20020152753A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/161,104 US6460343B1 (en) 1998-09-25 1998-09-25 Gas turbine engine

Publications (1)

Publication Number Publication Date
US20020152753A1 true US20020152753A1 (en) 2002-10-24

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Family Applications (2)

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US09/161,104 Expired - Fee Related US6460343B1 (en) 1998-09-25 1998-09-25 Gas turbine engine
US09/161,104 Granted US20020152753A1 (en) 1998-09-25 1998-09-25 Fuel mixing in a gas turbine engine

Family Applications Before (1)

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Country Status (9)

Country Link
US (2) US6460343B1 (enExample)
EP (1) EP1123457B1 (enExample)
JP (1) JP4263364B2 (enExample)
KR (1) KR20010085843A (enExample)
CN (1) CN1354819A (enExample)
AU (1) AU2471400A (enExample)
CA (1) CA2345341A1 (enExample)
DE (1) DE69912982T2 (enExample)
WO (1) WO2000022287A2 (enExample)

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US7836677B2 (en) * 2006-04-07 2010-11-23 Siemens Energy, Inc. At least one combustion apparatus and duct structure for a gas turbine engine
US7631499B2 (en) * 2006-08-03 2009-12-15 Siemens Energy, Inc. Axially staged combustion system for a gas turbine engine

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Also Published As

Publication number Publication date
KR20010085843A (ko) 2001-09-07
JP2002527707A (ja) 2002-08-27
DE69912982D1 (de) 2003-12-24
WO2000022287A3 (en) 2000-08-24
CN1354819A (zh) 2002-06-19
EP1123457B1 (en) 2003-11-19
US6460343B1 (en) 2002-10-08
WO2000022287A2 (en) 2000-04-20
DE69912982T2 (de) 2007-09-20
JP4263364B2 (ja) 2009-05-13
CA2345341A1 (en) 2000-04-20
AU2471400A (en) 2000-05-01
EP1123457A2 (en) 2001-08-16

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