Browsing Theses--ERC by Title
Now showing items 1-20 of 44
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Analysis of Intake Charge Temperature and EGR Stratification Effects on HCCI Combustion
(2009-07-08)HCCI combustion is characterized by a near homogeneous composition and temperature mixture of air, fuel and post-combustion products. HCCI related research work around the world defines different strategies for achieving ... -
Application of Supercontinuum Generation to Practical Absorption Spectroscopy
(2005)Supercontinuum light generation was used as a means to generate broadband light for spectroscopic measurements. The generated broadband light was used to measure carbon monoxide (CO) absorption in a sealed laboratory ... -
Characterization of Operating Parameters' Authority on the Flow-Field Mixedness of a DISI Engine
(2009-07-08)A study designed to characterize the authority of engine operating parameters? contribution to the mixedness of the non-reacting flow-field of an optically accessible directinjection spark ignition (DISI) engine was ... -
A COMPUTATIONAL STUDY OF FUEL IMPINGEMENT IN THE INTAKE OF A SPARK IGNITION ENGINE
(2009-07-08)A computational study of fuel impingement in a port fuel injection gasoline engine was performed to gain an understanding of the fuel impingement process, and provide insight into high load fuel delivery, where oil ... -
CONTINUOUS-WAVE COMB FOURIER TRANSFORM SPECTROSCOPY
(2009-06-24)Due to its versatility, Fourier-transform spectroscopy (FTS) has found wide-spread application in research and development, monitoring of industrial processes, forensics, etc1; its uses continue to expand2. Despite decades ... -
Development of a Spatially Resolved Optical Technique to Measure Temperature using Two-Photon Absorption of Xenon
(2005)A new spatially resolved optical technique to measure temperature was developed using two-photon absorption of xenon. This experiment excited the 256 nm two-photon transition of xenon by focusing the excitation source ... -
THE EFFECTS OF EXHAUST GAS RECIRCULATION ON COMBUSTION AND EMISSIONS IN AN AIR-COOLED UTILITY ENGINE
(2009-07-08)Among other requirements, small air-cooled utility engines must maximize power-toweight ratio. A means of meeting this requirement is to optimize the gas exchange process by utilizing cam shafts that complement high ... -
The Effects of Intake Charge Stratification on HCCI Combustion
(2009-07-08)A laboratory was constructed to investigate what effects could be generated in an HCCI engine by altering the properties of the engine?s intake charge. The principle changes investigated were altering the spatial ... -
THE EFFECTS OF LUBRICATING OIL CONSUMPTION ON THE DETAILED CHARACTERISTICS OF DIESEL PARTICULATE MATTER
(2009-07-08)Testing was carried out on a Cummins N14 single-cylinder heavy-duty D.I. diesel research engine with a full dilution tunnel system to quantify lubricating oil consumption (LOC) rates and determine any effects of changes ... -
EXPERIMENTAL INVESTIGATION OF BULK FLAME QUENCHING IN A DIRECT-INJECTION SPARK IGNITION ENGINE
(2009-07-08)The following thesis describes planar laser-induced fluorescence (PLIF) experiments that investigate bulk flame quenching in the lean periphery of a stratified fuel cloud during light-load operation of a direct-injection ... -
Fuel Effects on Homogeneous Charge Compression Ignition Combustion
(2009-07-08)Homogeneous charge compression ignition (HCCI) is one combustion strategy that has shown the possibility of both lower emissions and lower fuel consumption than spark ignition combustion. However, HCCI combustion can be ... -
FUEL FILM DIAGNOSTIC DEVELOPMENT OF A SPARK IGNITED, HOMOGENEOUS CHARGED, FOUR STROKE, AIR-COOLED ENGINE
(2009-07-08)The main objective of this research has been to develop techniques for qualifying and quantifying fuel film development in the intake port of a small air-cooled four-stroke utility engine. These techniques should be able ... -
Fuel Film Temperature and Thickness Measurements on the Piston Crown of a Direct-Injection Spark-Ignition Engine
(2009-07-08)The fuel film thickness and temperature on the piston crown of a direct-injection spark-ignition (DISI) engine were measured using a fiber-based laser induced fluorescence (LIF) method. The engine investigated employed a ... -
FUNDAMENTALS OF TRANSIENT THERMAL-LIGHT ABSORPTION SPECTROSCOPY AND APPLICATION TO OPTICAL SENSING IN HCCI ENGINES
(2009-06-24)A set of equations is developed for evaluating absorption spectroscopy based on thermal emitters such as lamps. The noise sources considered are photon (shot) noise and beating (wave interference) noise; signal-to-noise ... -
High Spectral Resolution Emission Thermometry for Combustion Applications
(2005)Several spectroscopic emission methods were investigated for the determination of combustion gas temperature. Spectroscopic simulations based on the HITRAN database were performed to aid in sensor design and data ... -
HIGH-SPEED, CONTINUOUS MONITORING OF LIQUID SPRAYS BY MULTI-WAVELENGTH ABSORPTION SPECTROSCOPY
(2009-06-24)A fiber-optic array was created by arranging four Corning lensed fibers in a parallel, horizontal plane. It has been shown that through the use of multiwavelength spectroscopy, this fiber array is capable of probing a ... -
HYPERSPECTRAL LASERS FOR SPECTROSCOPIC MEASUREMENTS IN THE NEAR-INFRARED
(2009-06-24)This project develops hyperspectral lasers that are built using fiber-optic cavities and broadband semiconductor gain media. These sources are custom designed for high-speed (typically 30 kHz) spectroscopic sensing ... -
INSTANTANEOUS HEAT FLUX MEASUREMENTS IN INTERNAL COMBUSTION ENGINES
(2011)High temporal resolution heat flux measurements were performed in two different internal combustion (IC) engines. Measurements in a large compression ignition engine were conducted with a wireless telemetry system utilizing ... -
INSTRUMENTATION FOR ABSORPTION
(2009-06-19)In order to measure ultraviolet spectra, an instrumentation method must be carefully selected. The first consideration is whether to use a hyperspectral source in combination with a singleelement photodiode or a broadband ...