A Variable Geometry Combustor for Broadened Properties Fuels
Author : W. J. Dodds
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Page : 8 pages
File Size : 46,64 MB
Release : 1987
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Author : W. J. Dodds
Publisher :
Page : 8 pages
File Size : 46,64 MB
Release : 1987
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Author : W. J. Dodds
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Page : 12 pages
File Size : 20,21 MB
Release : 1984
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In order to increase the availability and reduce the cost of future fuels for aircraft gas turbine engines, it may be necessary to broaden fuel specifications. Anticipated changes in fuel properties, and the effects of these changes on combustion system performance, operating characteristics, durability, and emissions are briefly reviewed, and results to date of a program being conducted to develop and demonstrate combustor technology required to utilize broadened-properties fuels in current and next-generation engines are described. Combustion system design considerations and tradeoffs for burning broadened-properties fuels are discussed, and test experience with several applicable combustor design modifications to the G.E. CF6-80A combustion system is reviewed. Modifications have been demonstrated to improve liner cooling and reduce smoke in the conventional annular combustor, thereby reducing effects of variations in fuel hydrogen content. Advanced staged and variable geometry combustor concepts for burning broadened-properties fuels have also been demonstrated.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 236 pages
File Size : 29,57 MB
Release : 2018-07-23
Category :
ISBN : 9781723535758
An experimental evaluation of two advanced technology combustor concepts was conducted to evolve and assess their capability for operation on broadened properties fuels. The concepts were based on the results of Phase 1 of the Broad Specification Fuel Combustor Technology Program which indicated that combustors with variable geometry or staged combustion zones had a flexibility of operation that could facilitate operation on these fuels. Emphasis in defining these concepts included the use of single pipe as opposed to duplex or staged fuels systems to avoid the risk of coking associated with the reduction in thermal stability expected in broadened properties fuels. The first concept was a variable geometry combustor in which the airflow into the primary zone could be altered through valves on the front while the second was an outgrowth of the staged Vorbix combustor, evolved under the NASA/P&W ECCP and EEE programs incorporating simplified fuel and air introduction. The results of the investigation, which involved the use of Experimental Referee Broad Specification (ERBS) fuel, indicated that in the form initially conceived, both of these combustor concepts were deficient in performance relative to many of the program goals for performance emissions. However, variations of both combustors were evaluated that incorporated features to simulate conceptual enhancement to demonstrate the long range potential of the combustor. In both cases, significant improvements relative to the program goals were observed. Lohmann, R. P. and Jeroszko, R. A. and Kennedy, J. B. Unspecified Center NASA-CR-191066, NAS 1.26:191066 NAS3-23269...
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Page : 244 pages
File Size : 38,10 MB
Release : 1990
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Author : United States. Congress. House. Committee on Science and Technology
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Page : 330 pages
File Size : 22,52 MB
Release : 1980
Category : Aeronautics
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Page : 1028 pages
File Size : 46,31 MB
Release : 1994
Category : Aeronautics
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : United States. Congress. House. Committee on Science and Technology. Subcommittee on Transportation, Aviation, and Materials
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Page : 332 pages
File Size : 47,77 MB
Release : 1981
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Author :
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Page : 1126 pages
File Size : 36,99 MB
Release : 1984
Category : Fossil fuels
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Page : 568 pages
File Size : 31,93 MB
Release : 1982
Category : Airplanes
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Page : 420 pages
File Size : 15,33 MB
Release : 1989
Category : Power resources
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