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Showing 1 to 20 of 34 for “"LII"”.
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Laser-induced incandescence for soot diagnostics at high pressure
This work focuses on laser-induced incandescence (LII) at elevated pressure. LII is a laser-based technique for measuring particle sizes and volume fractions of nano-sized particles in aerosols. These particles, as emitted by traffic in the form of soot, cause a significant health risk, as …
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Laser induced incandescence imaging for the investigation of soot formation in laminar flames
… sources and setups. Laser induced incandescence (LII) is an optical technique used in laser diagnostics to measure soot volume fraction and estimate particle size in-situ. Using imaging to measure LII allows for a range of combustion environments to be investigated and soot volume fractions to be …
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Laser Induced Incandescence for Volume Fraction and Relative Particle Size Measurements in a Rich-Quench-Lean Jet A Combustor
… distribution using laser-induced incandescence (LII) diagnostics inside a three-sector rich-quench-lean (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 …
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On the Use of Laser-Induced Incandescence for Soot Diagnostics: From Theoretical Aspects to Applications in Engines
The laser-induced incandescence technique (LII) is a laser-based diagnostic technique for measurements of soot volume fraction and particle size. The technique relies on detection of incandescent light from soot particles heated to around 4000 K using nanosecond laser pulses. A theoretical model …
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Validation of the life interests (leisure/work) inventory for secondary school students
… responses to the third question as to how the LII affected the student's perception of work and leisure gave ambiguous results. The LII was found to have discriminating and predictive value, with its unique emphasis on both work and leisure, with promise as a simple and easily scored aid in …
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Conditions for observing IR chemiluminescence and the role of condensation in metal oxidation reactions
… is unique in that the phase diagrams of Li and LiI in the P-T ranges of interest are almost identical. This property permitted a relatively easy control with respect to condensation and the measurement of IRCL in the 10-28 um range for the excited LiI molecule."
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Laser diagnostics of soot in hydrocarbon diffusion flames
… with results using laser-induced incandescence (LII) in the range of the soot volume fraction from 20 ppb to 15 ppm. The system is further applied to the measurement of soot volume fraction pro les of a series of nitrogen-diluted methane diffusion flames. The results of CW-LCE agree well with …
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Experimental Investigation of Large Scale Aerodynamics on Soot Emissions in Swirling Flows
… is increased. Next, OH-PLIF, PAH-PLIF and soot LII experiments were used to study the Ethylene flames. Past work has looked at dilution jets positioned at a fixed downstream location. In this thesis, the location and amount of dilution air were systematically varied. Results revealed a strong …
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Investigation of non-intercalation electrode materials for next-generation batteries
… sodium ion batteries. The fabrication of a rGO/LiI composite enables the use of LiI as a Li-ion battery cathode. The freestanding rGO/LiI electrodes show stable long-term cycling, reduced shuttling and good rate performance with high specific capacity and small hysteresis. The improved …
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Development Of A Two-Color Optical Diagnostic For The Determination Of Engine In-Cylinder Soot Temperature And Volume Fraction Evolution With A Flame-Calibrated Emissivity Model
… and CARS and laser-induced incandescence (LII) data obtained from a rich (Φ=2.1), C_2 H_4 / Air premixed flat calibration flame. With the flame-calibrated soot emissivity model, the in-cylinder soot temperature error between simulation and experiment decreases to ±5% implying an improvement …
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Lanthanide complexes of phthalimide and phthalamate containing ligands: synthesis, photophysical properties and their potential applications
… is based on the design and synthesis of Tb(lII) and Eu(lll) complexes of phthalimide and phthalamate derivatives as responsive lanthanide complexes.
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NUCLEATION AND DETECTION IN TENSION METASTABLE FLUIDS
… A novel approach using conventional (e.g., LiI, He-3, BF3) detectors coupled with Monte-Carlo code simulations to develop spectroscopy information was developed (in lieu of present-day tedious methods involving data acquisition using a multi-sized set of Bonner spheres). Focus of this thesis …
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Enabling multi-cation electrolyte usage in LMBs for lower cost and operating temperature
… in a standard uni-cation (Li+) Li-Mg/LiCl-LiF-LiI/Sb-Pb battery. SEM and EDS confirmed the stability of this anode with respect to the cathode (Sb-Pb) and the standard uni-cation electrolyte. Performance metrics (voltage, efficiencies, etc.) for the Li-Mg anode cell were found to be comparable …
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Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame
… (Fuel-PLIF), and laser induced incandescence (LII). Spray characteristics have been investigated by employing Mie scattering and phase Doppler particle analysis(PDPA). Particulate emissions in pyrolysis oil have been found to consist predominately of unburned fuel residues (cenospheres), rather …
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Development and characterization of a high resolution portable gamma spectrometer
… compared with other crystals such as NaI(TI) and LiI(Eu).
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Mesoscale wind atlas of South Africa
… predicted to within 18% + 20% of amplitude and lii of timing at coastal sites.
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Mesoscale Wind Atlas of South Africa
… predicted to within 18% + 20% of amplitude and lii of timing at coastal sites.
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Multi-Dimensional Quantitative Laser-based Diagnostics - Development and Practial Applications
… From high speed laser induce incandescence (LII) measurements in a heavy-duty Diesel engine, conclusions regarding soot formation and oxidation were drawn. The implementation of LII at high repetition rates in IC engines was investigated here. Challenges associated with attenuation of the …
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Sooting behaviour of turbulent non-premixed jet flames.
… using planar laser-induced incandescence (LII) have been performed in three commercial propane-fired flames produced by simple jet (SJ), precessing jet (PJ-P) and bluff-body jet (BB) burners. The flames span a wide range of different global mixing rates for the same nozzle diameter and fuel …
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Thermographic particle image velocimetry: from phosphorescence to incandescence
… version is based on laser-induced incandescence (LII), rather than phosphorescence. Submicron black particles are seeded into a flame, and further heated by a high-energy top-hat laser sheet to several thousands kelvin. The particle temperature $T_\mathrm{p}$ can be measured by two-color …
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