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Integral heater for fuel conveying member

a fuel conveying member and heater technology, applied in the direction of combustion process, turbine/propulsion fuel heating, turbine/propulsion fuel flow conduit, etc., can solve the problems of large cost, difficult to achieve, and inconvenient operation

Inactive Publication Date: 2006-07-20
PRATT & WHITNEY CANADA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an improved gas turbine engine fuel conveying member with a heating device that can clean carbon deposits in the fuel conveying member. The heating device heats the fuel flow passage to a high temperature to allow for the pyrolysis (decomposition by heat) of the carbon deposits, which can then be removed. This improves the efficiency and durability of the gas turbine engine.

Problems solved by technology

While such pyrolytic cleaning processes are generally effective they are often not easily accomplished.
U.S. Pat. No. 4,377,420 to Granatek et al. discloses an apparatus which is quite large and expensive.

Method used

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  • Integral heater for fuel conveying member
  • Integral heater for fuel conveying member
  • Integral heater for fuel conveying member

Examples

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Embodiment Construction

[0013]FIG. 1 illustrates a gas turbine engine 10 of a type preferably provided for use in subsonic flight, generally comprising in serial flow communication a fan 12 through which ambient air is propelled, a multistage compressor 14 for pressurizing the air, a combustor 16 in which the compressed air is mixed with fuel and ignited for generating an annular stream of hot combustion gases, and a turbine section 18 for extracting energy from the combustion gases.

[0014] Fuel is injected into the combustor 16 of the gas turbine engine 10 by a fuel injection system 20 which is connected in fluid flow communication with a fuel source (not shown) and is operable to inject fuel into the combustor 16 for mixing with the compressed air from the compressor 14 and ignition of the resultant mixture. The fan 12, compressor 14, combustor 16, and turbine 18 are preferably all concentric about a common central longitudinal axis 11 of the gas turbine engine 10.

[0015] Referring to FIG. 2, the fuel in...

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Abstract

A fuel conveying member for an engine, the fuel conveying member having heating means integrated therein to permit pyrolysis of carbonaceous deposits.

Description

TECHNICAL FIELD [0001] The invention relates generally to a fuel conveying member in a gas turbine engine. BACKGROUND OF THE ART [0002] Fuel conveying passages, conduits, manifolds and the like employed in gas turbine engines tend to gradually accumulate a build up of carbon or coke. Cleaning fuel passages requires chemical solvents or pyrolysis (heating and pressurizing with air). While such pyrolytic cleaning processes are generally effective they are often not easily accomplished. U.S. Pat. No. 4,377,420 to Granatek et al. discloses an apparatus which is quite large and expensive. Further, in order to heat up a relatively large component, such as the intermediate turbine case 20 depicted by Granatek et al. for example, the enclosed furnace 34 must be large. [0003] Accordingly, there is a need to provide an improved method and structure for cleaning fuel conveying members of a gas turbine engine. SUMMARY OF THE INVENTION [0004] It is an object of this invention to provide an impro...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F02C7/22
CPCF02C7/222F02C7/224F23D11/44
Inventor PROCIW, LEV ALEXANDERSHAFIQUE, HARRIS
Owner PRATT & WHITNEY CANADA CORP
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