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Showing 1 to 20 of 31 for “"Fuel Spray"”.
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Optical fuel spray measurements
Julkaistu vain painettuna, saatavuus katso Bibid. Published only in printed form, availability see Bibid
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An experimental investigation of fuel spray vapor phase characterization
… laser extinction technique for measuring fuel vapor flux in evaporating liquid fuel sprays was conducted. The infrared laser extinction technique consists of three separate measurements: a visible light angular scattering measurement, a visible light line-of-sight extinction measurement …
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Fuel spray modelling in direct-injection diesel and gasoline engines
… optimised to get the best compromise between fuel economy, emissions and power output/drivability. Among the variety of computational tools developed by researchers to investigate the multi-Phase flow development from high-pressure fuel injection systems for modem diesel and gasoline direct …
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Modeling Hydrodynamic Stability of Incline-Liquid Airblast Nozzle for Gas Turbine Combustion
<p>Fuel is a major cost item for civil transport airplanes. Minimizing fuel consumption of these crafts is a stream of economic opportunity and a stage for innovation, competition and exploration. Regardless of the fuel type, bio or crude oil based, the civil transport stakeholders would like to …
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Modeling the evolution of composition of the fuel and lubricant mixture on the cylinder wall in internal combustion engines
… for the advancement of modem engine technology. Fuels and lubricants used in internal combustion (IC) engines play an important role in governing the engine efficiency. In IC engines some amount of fuel spray can eventually end up on the cylinder liner. This fuel spray mixes with the oil …
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Spray visualization and characterization of a multi variable circular orifice (MVCO) injector coupled with a swirl adapter for diesel reformer applications
The fuel spray generated by the injector is of primary importance to mixing and hence, combustion efficiency, due to the extremely short time scale of the combustion event inside an internal combustion engine. In this respect, the aim of the fuel injection system is to atomize the fuel droplets as …
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A study on the emissions of butanol using a spark ignition engine and their reduction using electrostatically assisted injection
… than ethanol and improved miscibility in diesel fuel. Additionally, butanol is less corrosive and less prone to water absorption than ethanol, which allows it to be transported using the existing fuel supply pipelines. However, while some previous research on the emissions of butanol-gasoline …
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Characteristics of Active Combustion Control for Liquid-Fuel Systems with Proportional Primary Fuel Modulation
… experiments performed on an unstable kerosene-fueled turbulent combustor. Using a phase shift controller and primary fuel modulation stability is successfully gained for a wide band of global equivalence ratios allowing the limitations of the control scheme to be characterized. It is shown that …
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Impact of alternative jet fuels on gas turbine combustion systems
… of conventional, petroleum-derived jet fuels with alternative jet fuels plays an important role in climate change mitigation, economic security, and energy independence. To ensure that alternative jet fuels can replace conventional jet fuels without engine modification, new fuels must be …
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Design and Experimental Characterization of Electrostatically Assisted Automotive Fuel Injectors
With current automotive fuel injector designs, fuel mass and momentum cannot be independently controlled during engine operation. By introducing electrostatic charge to the fuel as it is injected, a means of altering the injector spray pattern without changing the mass injected is available. A …
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Investigation of alternative jet fuels in gas turbine combustion systems using x-ray radiography
… of alternatives to petroleum-derived jet fuels is essential for assisting in climate change mitigation and providing economic security and energy independence within industries that utilize jet fuels. It is important that jet fuels derived from alternative sources can be used in existing …
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Evaluation of hot surface ignition device performance with high-pressure kerosene fuel sprays
… well-characterized, highly-reactive diesel fuel to operate properly. As the United States Department of Defense implements the single fuel concept and with global efforts to develop alternatively derived fuels, it is paramount that modern CI engines have the capability to perform with a …
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Design, setup of an optically accessible internal combustion engine for study of gasoline direct injection combustion
… for automobiles. The precise control over fuel delivery increases the potential for better fuel efficiency and higher performance. In this study, a single-cylinder optically-accessible engine was built to visualize GDI combustion. The optical engine was originally designed and used as a …
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The effects of fuel volatility and operating conditions on sprays from pressure-swirl fuel injectors
… gasoline engines depends heavily on the fuel spray. Most of the studies published regarding these fuel sprays involve cold bench tests or motored optical engines, neglecting the roles of the fuel volatility and temperature. This study, therefore, was designed to describe changes in the …
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Fuel Droplet Optical Diagnostic Techniques for Lean Premixed Prevaporized Aeroengine Combustors
… and bypass ratios, they tend to consume more fuel and produce higher emissions compared to their subsonic counterparts. One promising solution is the lean prevaporized premixed (LPP) combustor design, which shows potential for lowering emissions at supersonic conditions. An LPP combustor is …
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Simulations And Experiments Of Fuel Injection, Mixing And Combustion In Di Gasoline Engines
… to investigate in detail the interactions of fuel spray and combustion system, such as air-fuel mixing, in-cylinder flow development, surface wetting, and turbulence intensity. The characterizations of the internal nozzle flow of DI injector are first studied using the multidimensional …
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Spray characterization of flex-fuel gasoline di injectors and spray interaction with charge motion in a variable valve actuation engine
… is to understand the characteristics of GDI sprays and behavior of in-cylinder charge motion in a GDI engine which is equipped with variable valve actuation. High speed spray visualization in a spray chamber was conducted for a study of spray development. By Schlieren visualization technique, …
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CFD Modelling of the Mixture Preparation in a Modern Gasoline Direct Injection Engine and Correlations with Experimental PN Emissions
… widely used characteristics of the high-pressure fuel spray. The methodology utilised the Siemens STAR-CD 3D CFD software environment and employed a combination of statistical and optimization methods supported by experimental data. The calibration process identified dominant factors influencing …
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Modification of an ignition quality tester and its use in characterizing middle distillate fuels
… to determine the derived cetane number of diesel fuel oils when used in conjunction with ASTM D6890. During a test, the fuel sample is injected into heated, pressurised gas where it combusts. Suitable measurements are made during the combustion event to determine the ignition delay of the fuel and …
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