The Experts below are selected from a list of 51 Experts worldwide ranked by ideXlab platform
Christopher Willam Wilson - One of the best experts on this subject based on the ideXlab platform.
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aviation gas turbine alternative Fuels a review
Proceedings of the Combustion Institute, 2011Co-Authors: Simon Blakey, Christopher Willam WilsonAbstract:Abstract The development of kerosene-like drop-in alternative Aircraft Fuels is currently receiving increased attention. Using a range payload approach the need for drop in Fuels is justified. The alternative Fuels available can be categorised into two groups; depending on whether the product increases supply security of supply or provides a reduced environmental footprint. This paper uncovers this relationship through a review of commercially available process technologies (Transesterfication, Fischer–Tropsch (FT) and hydroprocessing (HRJ)) to produce alternative Fuels. The lifecycle assessments available are reviewed to identify what are actually clean Fuels or have the potential to be one. A summary of the recent alternative fuel flight test campaigns is given and there results evaluated along with ground based results. A review of combustion characteristics available for the alternative Fuels including ignition characteristics are presented to demonstrate the effect the distillation curve has on combustion and how too narrow a distribution of components in the fuel could generate problems with high altitude relight. The effect alternative Fuels have on gaseous emissions regulated by the International Civil Aviation Organisation (ICAO) Committee on Aviation Environmental Protection (CAEP) is discussed and shown to be engine hardware dependant. Experimental data, from an Auxiliary Power Unit (APU) engine, are provided showing how, although the Gas to Liquid (GtL) and Coal to Liquid (CtL) FT Fuels may not reduce GHG emissions, even with Carbon Capture and Sequestration (CCS), the local air quality around airports will benefit through reduced particulate emissions. Finally the prospects for future fuel development are discussed.
Simon Blakey - One of the best experts on this subject based on the ideXlab platform.
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aviation gas turbine alternative Fuels a review
Proceedings of the Combustion Institute, 2011Co-Authors: Simon Blakey, Christopher Willam WilsonAbstract:Abstract The development of kerosene-like drop-in alternative Aircraft Fuels is currently receiving increased attention. Using a range payload approach the need for drop in Fuels is justified. The alternative Fuels available can be categorised into two groups; depending on whether the product increases supply security of supply or provides a reduced environmental footprint. This paper uncovers this relationship through a review of commercially available process technologies (Transesterfication, Fischer–Tropsch (FT) and hydroprocessing (HRJ)) to produce alternative Fuels. The lifecycle assessments available are reviewed to identify what are actually clean Fuels or have the potential to be one. A summary of the recent alternative fuel flight test campaigns is given and there results evaluated along with ground based results. A review of combustion characteristics available for the alternative Fuels including ignition characteristics are presented to demonstrate the effect the distillation curve has on combustion and how too narrow a distribution of components in the fuel could generate problems with high altitude relight. The effect alternative Fuels have on gaseous emissions regulated by the International Civil Aviation Organisation (ICAO) Committee on Aviation Environmental Protection (CAEP) is discussed and shown to be engine hardware dependant. Experimental data, from an Auxiliary Power Unit (APU) engine, are provided showing how, although the Gas to Liquid (GtL) and Coal to Liquid (CtL) FT Fuels may not reduce GHG emissions, even with Carbon Capture and Sequestration (CCS), the local air quality around airports will benefit through reduced particulate emissions. Finally the prospects for future fuel development are discussed.
Tedd B Biddle - One of the best experts on this subject based on the ideXlab platform.
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Properties of Aircraft Fuels and Related Materials.
1991Co-Authors: Tedd B BiddleAbstract:Abstract : Topics of this technical study include: general analysis and characterization of conventional and experimental fuel properties which are unique and/or critical to engine performance and durability; special investigations; development and evaluation of new test methods; refinement of existing test methods; additive evaluation and quantification; investigation of fuel and material related field problems; advanced fuel requirements; and fuel system parameters for current and advanced engines. Specific topics include: lubricity, thermal stability, vapor pressure, thermal conductivity, high density Fuels, corrosion inhibitors, and combustion.
Ernest S Hodge - One of the best experts on this subject based on the ideXlab platform.
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integration of high heat sink Fuels in Aircraft thermal management systems
ASME Turbo Expo 2003 collocated with the 2003 International Joint Power Generation Conference, 2003Co-Authors: Marvin R Glickstein, Valerie J Van Griethuysen, Ernest S HodgeAbstract:Efficient design of advanced military Aircraft to satisfy defined mission roles requires designing the individual components and subsystems, and subsequently integrating all of these to yield the desired final product. This design process, to be efficient, must optimize the total integrated design to best attain its product goal. Attaining operational goals requires that two related requirements are satisfied, namely Aircraft operation performance (i.e., the ability to operate over the desired flight profile with the desired range and payload), and the thermal control requirements (i.e., the ability to manage all of the thermal environments within the available resources). Development of future Aircraft Fuels with enhanced thermal stability provides the potential for greater heat sink capacity, thus expanding the thermal resources available for cooling. However, it is not immediately obvious how these additional resources should be integrated into the complex thermal control systems of future Aircraft in order to fully capitalize on the potential cooling capability. This paper describes the results of a study addressing this question for an advanced strike fighter, with appropriate mission and thermal requirements, along with an evaluation of the effects of system integration architecture for a variety of system concepts. The methods of system analysis and the study results provide some general guidelines for thermal system design employing enhanced Fuels and several types of overall system integration configurations.Copyright © 2003 by ASME
John Krieger - One of the best experts on this subject based on the ideXlab platform.
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The Thermal Stability of Fuels at 480 °C (900 °F): Effect of Test Time, Flow Rate, and Additives
Volume 3: Coal Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, 1995Co-Authors: Tim Edwards, John KriegerAbstract:The thermal oxidative stability of several Aircraft Fuels at high temperatures has been evaluated in a flowing test device. The Fuels studied include Jet A, JPTS, and JP-7. The tests evaluated solid deposition under various conditions, typically at maximum fuel temperatures of ∼480 °C (900 °F) at a pressure of 69 atm. Under these conditions, the dissolved oxygen in the fuel is completely consumed and the thermal-oxidative reactions are driven to completion. At test times up to 50 hours, both surface and bulk (filter) deposition was usually an approximately linear function of test time, after an initial induction time of low deposition which varied from 0 to ∼20 hours depending upon fuel quality. In tests with flow rates from 12 to 200 mL/min (1–21 lb/hr), the deposition rate (expressed in ppm) was fairly constant. These data give some guidance for extrapolating results from small flow-rate bench-scale tests to higher flow rates more realistic to Aircraft fuel systems, for conditions where the oxygen is completely consumed. For conditions where the oxygen is not completely consumed, the relationship between surface and suspended bulk deposits can become quite complex. Two dispersant additives widely examined in the JP-8+100 program were studied, with the additive significantly decreasing the slope of the deposition-vs-time curve (the deposition rate) for Jet A Fuels.Copyright © 1995 by ASME
