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Showing 1 to 20 of 54 for “"PLIF"”.
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Quantitative Acetone PLIF Measurements of Jet Mixing with Synthetic Jet Actuators
… factor. In order to extend quantitative acetone PLIF to two-phase flows, the remaining unknown photophysical properties of acetone were identified. Tests showed that the technique could simultaneously capture acetone vapor and acetone droplets. A model of droplet fluorescence was developed, and …
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PLIF investigation of the fuel distribution in gasoline direct injection fuel sprays
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Towards predicting dynamics in turbulent premixed combustion using PIV-PLIF measurements of flow-flame microstructure
… flow, while planar laser-induced fluorescence (PLIF) of OH radical is used to investigate the flame microstructure. Results demonstrate that combustion dynamics in wake-stabilized flames can be characterized using a single non-dimensional parameter that collapses many response measures over a …
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An Experimental Investigation of the Injection Process in a Direct-Injected Natural Gas Engine Using PLIF and CARS
… the large-scale mixing structures evident in the PLIF images.
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Development of high-speed laser diagnostics for the study of advanced propulsion systems
… planar laser-induced fluorescence (PLIF) is used to produce temporally resolved two-dimensional concentration fields of the molecular species targeted. Novel advancements in this study include kHz-rate hydroxyl radical (OH) PLIF of combustion phenomena within a supersonic wind tunnel …
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Hydroxyl-Radical Planar Laser-Induced Fluorescence Imaging of Turbulent Supersonic Combustion
… radical (OH) planar laser-induced fluorescence (PLIF) images are presented. The OH PLIF images show instantaneous structures of turbulence in two combustor configurations at different fuel equivalence ratios in the University of Virginia Supersonic Combustion Facility (UVaSCF). Proper orthogonal …
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Analysis of Entry Point of Pedicle Screw Placement in the Lumbar Spine
… the combined posterior lumbar interbody fusion(PLIF) do not need to expose the transverse process. Before clinical application, the author studied the insertion point using 5 cadaveric dried lumbar vertebral bodies (50 points). The anatomic landmark was used as the starting point of screw …
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Experimental investigations into high-altitude relight of a gas turbine
… of planar laser-induced fluorescence (PLIF) to monitor fuel placement in a combustor under these conditions. A novel apparatus is developed to deliver a laser sheet to the combustion chamber while protecting all optical surfaces from contamination. The PLIF images are compared with the …
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Autoignition and emission characteristics of gaseous fuel direct-injection compression-ignition combustion
… utilizing Planar Laser Induced Fluorescence (PLIF). Single-shot OH-PLIF images revealed the stochastic nature of the autoignition process of non-premixed methane jets. Examination of the convergence of the ensemble-averaged OH-PLIF images showed that increasing the number of repeat experiments …
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Laser Diagnostic Techniques with Ultra-High Repetition Rate for Studies in Combustion Environments
… formaldehyde planar laser-induced fluorescence (PLIF) was carried out for the new design. Moreover, a novel multi-dye laser cluster has been set up. By pumping each of the four dye lasers individually using the Nd:YAG lasers in the multi-YAG cluster, tunable laser radiation with an ultra-high …
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Reactive flow visualization through high-speed optical laser diagnostics
… radicals, by planar laser-induced fluorescence (PLIF). This allows for the visualization of the flame surface behavior, while at the same time linking it to inherent flow and combustion instabilities. Characterizing turbulence requires high temporal resolution and combining it with high-speed …
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DEVELOPMENT OF KRYPTON PLANAR LASER INDUCED FLUORESCENCE METHODS FOR THE MEASUREMENT OF HYPERSONIC FLOW CONDITIONS
… 3 Calibration wind tunnel was utilized and Kr-PLIF measurements were taken about a 0.50” spherical model and 2” BOLT model. A wide variety of equipment and methods were assessed for their suitability of this project, including 3 cameras and 7 sheet combinations. A beam from a single-diode …
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Three Dimensional Laser Diagnostics for Turbulent Flows and Flames
… planar laser induced fluorescence (SR-PLIF). First, 3D flame topography of well-controlled laboratory flames was measured with TC method and validated by a simultaneous 2D Mie scattering measurement. The results showed that the flame topography obtained from TC and the Mie scattering …
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Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames
… (methylidyne) planar laser induced fluorescence (PLIF). Flame topography measurements in terms of flame surface density and curvature were calculated based on the flame front detected by the CH PLIF signal. The goal of this work was to investigate turbulent flames with extremely high turbulence …
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Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame
… hydroxyl radical planar induced fluorescence (OH-PLIF), fuel planar laser-induced fluorescence (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 …
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Understanding the development of a reacting fuel jet inside an automotive-size diesel engine using optical and laser-based diagnostics
… fluorescence imaging of hydroxyl (OH-PLIF), fuel-PLIF, and line-of-sight integrated chemiluminescence imaging were performed for various combustion stages identified by the in-cylinder pressure traces and apparent heat release rates. These include stages of vaporising fuel penetration, …
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Equivalence Ratio Gradient Effects on Local Flame Front Topology and Heat Release Rate in Stratified, Iso-Octane/Air Turbulent V-Flames
… tracer planar laser induced fluorescence (PLIF) was used to determine an analysis region of interest (ROI) within the flame. Iso-contours of equivalence ratio were traced up to the mean position of the flame front to define the width of the ROI, which was specific to each mean ϕ gradient …
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Protein kinases: Structure modeling, inhibition, and protein-protein interactions
… protein ligand interaction fingerprints (PLIF). We generated a PLIF-based pharmacophore model which is highly selective for CDK2 ligands. A virtual screening workflow was developed making use of the PLIF-based pharmacophore model, ligand fitting into the CDK2 active site and selective CDK2 …
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Swirl-stabilized lean-premixed flame combustion dynamics: An experimental investigation of flame stabilization, flame dynamics and combustion instability control strategies
… release and combustor acoustic modes where one amplifies the other in a feedback loop. This is a complex phenomenon which involves unsteady chemical kinetic, fluid mechanic and acoustic processes that can lead to unstable behavior and could be detrimental in ways ranging from faster part fatigue …
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Flame front imaging and ignition performance of ultra-compact trapped-vortex combustor
… inside the combustor. High-speed OH* PLIF imaging was conducted at two spanwise locations along the combustor cavity at 1∼3 atm, revealing an axial shift in flame distribution along the cavity vortex as pressures increased. The ignition performance of the ARC-S1 was investigated at …
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