Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"Jet A"”.
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Study of the storage deposit of a model fuel and jet A fuel, A
Includes bibliographical references.
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Laser Induced Incandescence for Volume Fraction and Relative Particle Size Measurements in a Rich-Quench-Lean Jet A Combustor
… (RQL) aeroengine combustor running with Jet A fuel. First, the setup is described including details of the combustor, pressure vessel, data acquisition system, optics, and facilities. Then, the methodology for calibrating and estimating soot volume fraction with LII measurements and the …
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Exploring the socio-economic impacts of South Africa’s just energy transition (JET): a case study of coal-dependent communities in Mpumalanga
… was to explore the socio-economic impacts of the JET on employment in Mpumalanga. The study has emphasised the importance of companies in the energy sector to consider implementing low-carbon mechanisms to avoid operational disruptions and other risks. The study adopted a qualitative research …
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Ignition delay study of next generation alternative jet fuels in a rapid compression machine
… study is to determine the ignition delay time of jet fuels of interest; conventional, alternative, and surrogate blends. By measuring the pressure trace of autoignition in rapid compression machine, ignition delay time is captured through the pressure derivative. Category A fuels represent …
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Hydrogen powered hybrid wing body freighter systems analysis and conceptual design using the ACS tool
… and design for a hydrogen powered aircraft vs. a Jet-A powered aircraft. The Hydrogen powered aircraft, while requiring a heavier fuel system, had a significantly lower takeoff weight than the Jet-A aircraft. The Hydrogen fuel was much lighter because the specific energy is much higher than Jet-A. …
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Development of mesoscale burner arrays for next generation compact gas turbines
… experiments were extended for a liquid fuel (Jet A) and the results successfully demonstrated the potential for the integration of heavy hydrocarbon liquid fuels. The mesoscale burner array was investigated using pre-vaporized Jet A fuel. The effects of inlet temperature on Jet A flames in the …
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A test-cell installation of a gas turbine engine to investigate the performance advantages of low aromatic fuel
The foreseeable opportunity for LTFT jet fuel has spurred an initiative for Sasol Technology Fuels Research to increase the level of gas turbine expertise within the mechanical group. This included gaining an intimate familiarity with the jet fuel business, and all relevant aspects of gas turbine …
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Flow Field and Soot Formation Characteristics in Swirl-stabilized Non-premixed Turbulent Flames
… different fuels: methane, ethanol and aviation Jet A-1. The studied flames were confined and stabilized in a model gas turbine combustor with a swirl number of ~0.55. Soot volume fraction, fv, and primary soot particle size, dp, were measured using auto-compensating laser-induced incandescence, …
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The use of chemiluminesence for light-off detection of flames
… on gaseous methane, liquid hexane and liquid Jet-A aircraft fuel) from 280 nm to 610 nm indicated that these two species produced the strongest signals available for flame detection. As their light is emitted in the ultraviolet spectrum, using the OH and CH radicals will potentially provide a …
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Characterization of liquid aviation fuel combustor for condensation trail research
… Flame oscillatory stability was achieved for Jet-A fuel through limiting evaporation temperatures to below 443 K with air temperatures are between 413 and 453 K. Superior mixing and efficiency was achieved using swirling inner bodies. Jet-A soot had primary particle diameters between 19 and 21 …
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Flame Studies on Conventional, Alternative, and Surrogate Jet Fuels, and Their Reference Hydrocarbons
… fuels, including conventional and alternative jet fuels, surrogate fuels, and their reference hydrocarbon components. The laminar flame speeds and extinction stretch rates are experimentally determined by using a twin-flame counterflow setup integrated with a Digital Particle Image Velocimetry …
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THERMODYNAMIC AND TRANSPORT PROPERTIES OF AVIATION TURBINE FUEL: PREDICTIVE APPROACHES USING ENTROPY SCALING GUIDED MACHINE LEARNING WITH EXPERIMENTAL VALIDATION
… at a single temperature (54 F-24, 26 JP-8, 11 Jet A, 5 Jet A-1), and four samples (3 JP-5 and 1 F-24) which underwent compositional and temperature dependent property testing. The novel modeling approaches to predict viscosity and thermal conductivity of jet fuels employed pseudo component …
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Measurement of ignition delay time of jet fuels in shock tube for the development of the chemical kinetic mechanism
… analysis, together with prior work on F-24 and Jet-A, is used to justify Jet-A HyChem as the base mechanism and to highlight the distinct character of alternative fuels such as ATJ and CycloSAF. The UIUC shock tube is re-instrumented with a tailored driver and an endwall pressure transducer, …
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Effects of O-Ring Elastomers with Conventional and Synthesized Aviation Fuels with a Novel Elastomer Dynamic Compression System
… FKM O-ring elastomer reaction with conventional Jet A, HEFA, ATJ, and synthetic aromatic kerosene individually along with blends of synthetic fuels with Jet A. Additionally, the complex pathway of fuel into the O-ring is investigated in conjunction with compression effects on elastomer swell.The …
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The effect of different chemical classes on the swelling of NBR O-rings in blends with synthetic paraffinic kerosene
Synthetic jet fuels provide a number of benefits over petroleum-derived fuels. They have thus been considered as alternative fuels. Compatibility issues, however, are of concern; specifically the interaction of synthetic fuels with polymeric materials which are commonly used to seal fuel systems. …
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Autoignition study of next generation aviation fuels and components
… Category A fuels, designated in the National Jet Fuel Combustion Program, are the set of fuels that represent conventional aviation fuels in commercial and military applications. Ignition delay times of three category A fuels —Jet A-1, Jet A-2 and Jet A-3— have been measured in the heated RCM …
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Thermoacoustic Oscillations in Supercritical Fluid Flows
Pressure oscillations in supercritical Jet-A fuel flowing through four parallel, heated tubes connected to common manifolds have been observed in this study. Tests were performed with fuel inlet temperatures ranging from 70F to 700F, and fuel pressures ranging from 360-700 psi. Total fuel flow rate …
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Assessment of Turbulence Modelling for Compressibility Effects in Ejector Ramjet Applications
… effects for a confined supersonic jet, a key component of the Atlantis Intake System ejector ramjet. The third-party OpenFOAM compressible flow solver, pimpleCentralFOAM, is used to simulate a Mach 1.25 axisymmetric jet discharging inside a mixing tube and is compared against PIV …
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Simulating Extinction and Blow-off in Kerosene Swirl Spray Flames
Alternative jet fuels are being developed for use with existing jet engines, however there are still knowledge gaps concerning how unusual compositions and properties of these fuels will affect combustion performance. Physical and chemical processes leading to problematic engine stability phenomena …
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Measurements of the length of the zone of flow establishment in a jet using a Laser Doppler Anemometer
… in a submerged, turbulent, buoyant, axisymmetric jet issuing into a quiescent ambient fluid was investigated using a Laser Doppler Anemometer and microthermocouple probe. Also, velocity and temperature profiles were measured through various cross-sections of the jet; A 3-dimensional traversing …
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