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Development Of A Laser Induced Fluorescence Lif Method To Visualize The Gasoline Distribution In A Sl Engine
Download Development Of A Laser Induced Fluorescence Lif Method To Visualize The Gasoline Distribution In A Sl Engine full books in PDF, epub, and Kindle. Read online Development Of A Laser Induced Fluorescence Lif Method To Visualize The Gasoline Distribution In A Sl Engine ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Development of a Laser-Induced Fluorescence (LIF) Method to Visualize the Gasoline Distribution in a Sl Engine by : Thomas A. Heinze
Download or read book Development of a Laser-Induced Fluorescence (LIF) Method to Visualize the Gasoline Distribution in a Sl Engine written by Thomas A. Heinze and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser Induced Fluorescence (LIF) is used for planar imaging in a Sl engine. The gasoline was seeded with three different dopants: biacetyl, benzaldehyd, and tetramethyl-p-phenylene diamine (TMPD). Specific problems related to the application of LIF measurements in automative engines are discussed. The non-toxic biacetyl has important advantages. In contrast to TMPD and benzaldehyd it has good vaporization properties and its fluorescence is nearly insensitive to oxygen quenching. Therefore it can also be used in fire SI engines. The linearity investigations indicate the quantitative concentration measurements can be obtained. (Author).
Book Synopsis Application of Laser-Induced Fluorescence (LIF) to Liquid-Propellant Rocket Engine Testing by : C. Brasier
Download or read book Application of Laser-Induced Fluorescence (LIF) to Liquid-Propellant Rocket Engine Testing written by C. Brasier and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion exhausts present a challenging problem for researchers due to the extremely harsh environment, and nonintrusive diagnostics are often sought to provide flow property information. Laser induced fluorescence (LIF) is one technique in which a chosen flow molecule or marker is probed to yield gross flow properties, such as static temperature and flow velocities. The work presented herein describes the application of LIF to the combustion exhausts of several full-scale liquid-propellant rocket engines spanning a wide range of operational parameters. The method is based upon the use of CW ring-dye lasers which scan in frequency over either the Na D1 or D2 line at 5896 and 5890 A. Na is used as a basis for this approach since it occurs as a trace element in both hydrogen and amine rocket fuels. The generic apparatus is described, including a discussion of the collection and interpretation of the LIF signal to yield radial and temporal profiles of radial flow velocity, static temperature, and fuel distribution. It was found that the LIF technique provides quality data in most cases. Certain stressing situations were also found in which data on the flow properties were not obtainable. Also, computational fluid dynamics (CFD) modeling of the plumes was used to provide baseline estimates of the exhaust flow properties. The model reasonably predicted the gross behavior of the flow as determined by the LIF technique, although some items of fine spatial structure were not reproduced very well.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1995 with total page 1742 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1994 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development and Optimisation of Two-line Planar Laser Induced Fluorescence Technique for Combustion Measurements by : Mohammadreza Anbari Attar
Download or read book Development and Optimisation of Two-line Planar Laser Induced Fluorescence Technique for Combustion Measurements written by Mohammadreza Anbari Attar and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study has focused on development, optimisation and implementation of the 2-line Planar Laser Induced Fluorescence (2-line PLIF) technique for combustion measurements on a single cylinder optical Gasoline Direct Injection (GDI) engine with both Spark Ignition (SI) and Controlled Auto Ignition (CAI) combustion operations. The CAI combustion was achieved by employing Negative Valve Overlap (NVO). Two excitation wavelengths at 308 nm (directly from a XeCl laser) and 277 nm (via Raman shifting a KrF laser output at 248 nm) were exploited for the measurements. A calibration curve of fluorescence signal intensity ratio of the two laser beams as a function of temperature was obtained by conducting a series of static tests on a specially designed Constant Volume Chamber (CVC). The developed technique was validated by measurements of in-cylinder charge temperature during the compression stroke for both motoring and firing cycles and comparing the PLIF values with the temperature values calculated from in-cylinder pressure data assuming a polytropic compression. Following the validation measurements, the technique was applied to study of fuel spray characteristics and simultaneous measurements of in-cylinder charge temperature and mole fraction of Exhaust Gas Residuals (EGR). Further optimisation of the thermometry technique by enhancing the fluorescence Signal to Noise Ratio (SNR) and improving both the temporal and spatial resolutions as well as measurements precision provided the opportunity to apply the technique to other combustion measurements. The thesis presents the first application of the 2-line PLIF diagnostic in study of direct injection charge cooling effects and study of flame thermal stratification in IC engines.
Book Synopsis Combustion and flow diagnostics by : SAE.
Download or read book Combustion and flow diagnostics written by SAE. and published by . This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Visualization of Two-phase Fluid Distributions Using Laser-induced Exciplex Fluorescence by : JongUk Kim
Download or read book Visualization of Two-phase Fluid Distributions Using Laser-induced Exciplex Fluorescence written by JongUk Kim and published by . This book was released on 1997 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Fluorescence Gas Puff Density Measurements by : Matthew Thomas Evans
Download or read book Laser Induced Fluorescence Gas Puff Density Measurements written by Matthew Thomas Evans and published by . This book was released on 2012 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The double gas puff valve is a device used to inject a supersonic puff of gas to act as a load in z-pinch plasma implosions. The purpose of the annular gas shells is to mimic a cylindrical column along the z-axis in efforts to reduce Rayleigh-Taylor instability. However before integration of the valve into the zpinch pulsed power machine the gas profile needs to be examined. Tuning the density of the gas to fit specific profiles leads to improvement in plasma radiative sources and yields. The axial uniformity of the cylindrical gas column is highly dependent on the nozzle characteristics and shape. Performance is then determined by the density, speed, and symmetry of the gas column. Measurement of the density distribution is performed using a spectroscopic measuring technique called laser-induced fluorescence. LIF is a 1-dimensional imaging technique that maps the concentration of atoms with the aid of a tracer. LIF and the 2-dimensional counterpart planar laser-induced fluorescence (PLIF) examine the gas flow in the r-z plane with sub-millimeter resolution. The tracer molecule fluoresces due to excitation by a laser beam. The fluorescence signal is imaged using a streak camera and a charge-coupled-device (CCD) in combination. The method also allows the study of gas puff reliability. Any differences between gas shells can then be examined and interpreted with reliable certainty. Imaging software is used to determine the density from the intensity of the fluorescence images. A detail account of the process is illustrated in this study. A control system was constructed for operations of the gas puff valve in both LIF and z-pinch experiments. The pressure system is designed to tailor specific profiles as needed. The LIF system is detailed along with any components built for the gas puff valve. Results of these measurements serve to verify the uniformity of flow and determine the density distribution of the gas puff.
Book Synopsis Calibration of the Laser Induced Fluorescence Technique Applied to Oil Film Thickness Measurements on a Diesel Engine Cylinder Liner by Using Capacitance Gauges by : Dan O. Ducu
Download or read book Calibration of the Laser Induced Fluorescence Technique Applied to Oil Film Thickness Measurements on a Diesel Engine Cylinder Liner by Using Capacitance Gauges written by Dan O. Ducu and published by . This book was released on 1996 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Planar Laser Induced Fluorescence as a Diagnostic for Determining Mass Distribution in Gas Puff PRS Loads by :
Download or read book Planar Laser Induced Fluorescence as a Diagnostic for Determining Mass Distribution in Gas Puff PRS Loads written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work we report on our efforts to develop a laser induced fluorescence system (LIF), using nitric oxide (NO) as the tracer, to determine the mass distribution in a gas puff nozzle assembly used as a z-pinch plasma radiation source load. The same assembly has also been extensively studied at NRL using laser interferometry at Titan, Pulsed Sciences Division using LIF with acetone as the tracer. Preliminary results indicate that the NO-LIF, laser interferometry and the previous LIF results agree to within 20%. Concentrations of NO less than 0.1% can be used.
Book Synopsis Development of Laser-induced Fluorescence to Quantify In-cylinder Fuel Wall Films by :
Download or read book Development of Laser-induced Fluorescence to Quantify In-cylinder Fuel Wall Films written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Diagonal Excitation/observation Diagnostic Technique for Planar Laser-induced Fluorescence of the Methyne Radical in Diesel Engines by : Mark P. Musculus
Download or read book Development of a Diagonal Excitation/observation Diagnostic Technique for Planar Laser-induced Fluorescence of the Methyne Radical in Diesel Engines written by Mark P. Musculus and published by . This book was released on 1998 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Diagnostics for Reacting Flows by :
Download or read book Laser Diagnostics for Reacting Flows written by and published by . This book was released on 2007 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced optical diagnostic techniques relevant to propulsion were investigated. The techniques studied were based on laser spectroscopy, with emphasis on spectrally-resolved absorption and laser-induced fluorescence (LIF). Laser sources included tunable cw near-infrared diode lasers and tunable (or fixed-wavelength) pulsed lasers operated at ultraviolet (UV) or infrared (IR) wavelengths. The cw lasers were spectrally narrow, allowing study of innovative diagnostics based on spectral lineshapes, while the pulsed lasers provided intense bursts of photons needed for techniques based on LIF. Accomplishments of note included: (1) development of a new imaging diagnostic based on infrared planar laser-induced fluorescence (IR PLIF), (2) investigations of quantitative ultraviolet (UV) PLIF of NO and CO2 in high-pressure combustion environments, (3) the development of a new temperature diagnostic using UV absorption of CO2 for high-temperature combustion environments, (4) development of advanced wavelength-multiplexed diode laser absorption sensing of non-uniform temperature distributions, gas temperature in scramjet flows, and tunable mid-IR-based fuel sensing, and (5) further development of quantitative tracers to image fuel distribution using ketones and the aromatic toluene. The full spectrum of results was published in thirty-eight papers in the AIAA and peer reviewed literature, seven PhD theses, and forty-three presentations and invited lectures.
Book Synopsis Laser Induced Fluorescence Study of the Heterogeneous Interaction of Polycyclic Aromatic Hydrocarbons with Aqueous Surfaces [microform] : Adsorption and Reaction with Gas-phase Ozone by : Baagi Thema Mmereki
Download or read book Laser Induced Fluorescence Study of the Heterogeneous Interaction of Polycyclic Aromatic Hydrocarbons with Aqueous Surfaces [microform] : Adsorption and Reaction with Gas-phase Ozone written by Baagi Thema Mmereki and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have also measured the kinetics and products of a reaction between gas-phase ozone and anthracene adsorbed at the air-aqueous interface. The reactions at the "uncoated" air-water interface and at an interface consisting of a monolayer of various organic compounds were studied. In all the cases, the reaction follows a Langmuir-Hinshelwood mechanism, in which ozone first adsorbs to the air-aqueous interface, and then reacts with adsorbed anthracene. For typical atmospheric ozone concentrations, the estimated reactive uptake coefficient ranges from 2 x 10-8 to 3 x 10-7 depending on the nature of the air-aqueous interface. Smaller (C4, C6) carboxylic acids at the interface inhibit the reaction (compared to the "clean" water surface); 1-octanol enhances it. Under some circumstances, oxidation by ozone on aqueous surfaces may be more important in the atmosphere than gas phase oxidation by OH radicals. The fate of atmospheric semi-volatile organic compounds (SOCs) such as polycyclic aromatic hydrocarbons (PAHs) depends, in part, on their distribution between the gas phase and particulate phases, and oxidation reactions. In the daytime troposphere, photochemically produced OH radicals dominate these reactions, whereas chlorine atoms may contribute to the oxidation of certain PAHs in coastal areas. In the dark, oxidation by nitrate radicals (NO3) may also be important, whereas ozone can contribute to the oxidation both during the day and at night. We have developed a laser-induced fluorescence (LIF) method to study adsorption and oxidation of PAHs at the air-aqueous interface. This method allows to directly probe the mechanisms and extent of PAH uptake on aqueous surfaces. The kinetics of the adsorption of anthracene and pyrene onto "pure" water and water coated with an organic film were measured. The surface uptake coefficients of both PAHs are estimated to be on the order of 10-5, and increase by a factor of 2--3 for uptake to the 1-octanol coated water surface. However, the surface uptake of pyrene to a hexanoic-acid-coated aqueous surface does not display this enhancement. Resolved fluorescence spectra of pyrene adsorbed onto 1-octanol-coated surfaces indicate that pyrene is in a less polar environment than when adsorbed at the hexanoic-acid-coated surfaces.
Book Synopsis Development of a Laser Induced Fluorescence System for Measuring Oil Film Thickness in Two Dimensions in a Reciprocating Engine by : Pierre Miguel Mulgrave
Download or read book Development of a Laser Induced Fluorescence System for Measuring Oil Film Thickness in Two Dimensions in a Reciprocating Engine written by Pierre Miguel Mulgrave and published by . This book was released on 1997 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Planar Laser Induced Fluorescence for Fuel by : D. A. Greenhalgh
Download or read book Development of Planar Laser Induced Fluorescence for Fuel written by D. A. Greenhalgh and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A New Approach of Planar Laser Induced Fluorescence Applied to Fuel/air Ratio Measurement in the Compression Stroke of an Optical S. I. Engine by : Josué Reboux
Download or read book A New Approach of Planar Laser Induced Fluorescence Applied to Fuel/air Ratio Measurement in the Compression Stroke of an Optical S. I. Engine written by Josué Reboux and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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