Browsing Theses--ERC by Author "Ghandhi, Jaal B."
Now showing items 12-29 of 29
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Investigation of Flame-Front Equivalence Ratio during Stratified Engine Combustion
Rothamer, David A. (2009-07-08)Stratified engine combustion was investigated using simultaneous imaging of the fuel distribution and flame front in an optically accessible direct-injection spark-ignition engine. Planar laser-induced fluorescence of ... -
LIGHT-LOAD BURN RATE ANALYSIS IN AN AIR-COOLED UTILITY ENGINE
Brossman, John Richard (2009-07-08)In order to maximize the power-to-weight ratio, small, air-cooled utility engines are designed for WOT performance. Low-speed, light-load conditions suffer due to high residual gas retention, poor volumetric efficiency ... -
Near-wall PLIF Imaging of Formaldehyde in an HCCI Engine
Schrewe, Mark R. (2009-07-08)This project studied the characteristics of Homogeneous-Charge Compression Ignition (HCCI) combustion near the combustion chamber surfaces using Planar Laser- Induced Fluorescence (PLIF) of the intermediate combustion ... -
Non-Intrusive Engine Piston Temperature Measurement Using a Fiber Bragg Grating
Pfeifer, Timothy Ross (2009-07-08)An embedded fiber Bragg grating was used to examine the operating temperature of a small gasoline engine piston. Optical system analyses were conducted to enhance the accuracy and consistency of the measured piston ... -
Numerical and Experimental Fuel Flow Analysis of Small Engine Carburetor Idle Circuits
Hendricks, Terry L. (2009-07-08)Small engine carburetors have been used for over 100 years and their continual development has produced a mechanical device that although simple in principle is difficult to control in practice. This study aims to develop ... -
OH Absorption Spectroscopy to Investigate Light-Load HCCI Combustion
Younger, Sean J. (2009-07-08)Absorption spectroscopy of the OH molecule was used to examine the light-load limit of the HCCI combustion process. Optical results were compared to cylinder pressure and emissions data, with a focus on the transition ... -
OPTICAL INVESTIGATIONS OF THE EFFECTS OF STRATIFICATION ON HOMOGENEOUS CHARGE COMPRESSION IGNITION COMBUSTION
Herold, Randy E. (2009-07-08)The effects that thermal and compositional stratification have on homogeneous charge compression ignition (HCCI) combustion were studied using an optically accessible internal combustion engine. A stratified flowfield ... -
Optical Spray Patternation of Gasoline Fuel Injectors
Rudnitzki, Ryan M. (2009-07-08)Planar Mie scattering images were acquired for 21 injectors to investigate the feasibility of a predictive method of injector performance in an engine. A testing apparatus was constructed, which allowed optical access ... -
Particulate Matter Formation Mechanisms in a Direct-Injection Gasoline Engine
Cromas, Jared (2009-07-08)Experiments were conducted to determine the particulate formation mechanisms of a single-cylinder direct-injection two-stroke gasoline engine. The engine was tested at four operating points; an idle condition with a ... -
PISTON HEAT TRANSFER IN AN AIR-COOLED ENGINE
Dembroski, Terry Joseph (2009-07-08)Thermal energy flow within the piston of an air cooled engine was investigated by measuring the heat flux in the engine cylinder liner in the region of travel of the piston rings. Engine sump oil temperature and oil ... -
QUANTITATIVE 2-D FUEL VAPOR CONCENTRATION MEASUREMENTS IN AN EVAPORATING DIESEL SPRAY USING THE EXCIPLEX FLUORESCENCE METHOD
Kim, Tongwoo (2009-07-08)To experimentally investigate evaporating sprays under conditions experienced in high speed direct-injection (HSDI) diesel engines, the exciplex (excited state complex) laser-induced fluorescence technique and high-speed ... -
RESIDUAL GAS EFFECTS ON COMBUSTION IN AN AIR-COOLED UTILITY ENGINE
Albert, Brian Phillip (2009-07-08)Air-cooled utility engines are often equipped with cams designed to ensure maximum charging efficiency, but the resulting valve lift and timing often correlates to poor engine performance at low speeds and light loads, ... -
Residual Gas Mixing in Engines
Bright, Andrew G. (2009-07-08)The mixing of fresh charge with residual gases was studied in a spark-ignition engine using planar laser-induced fluorescence (PLIF) of a homogenous air/fuel/tracer mixture. An adjustable, dual-overhead cam cylinder head ... -
SCAVENGING MEASUREMENTS IN A DIRECT-INJECTION TWO-STROKE ENGINE
Foundray, Hickory Zachariah (2009-07-08)The scavenging process in a direct-injection two-stroke research engine was examined. A physical model was developed to characterize scavenging based on known quantities. An electromagnetic valve was used to sample ... -
Spectroscopic Investigation of Chemiluminescence in Gasoline Homogeneous Charge Compression Ignition Engine
Augusta, Rinaldo (2009-07-08)A spectroscopic diagnostic system has been designed to study the effects of different engine parameters on the chemiluminescence characteristic of HCCI combustion. Light emitted during the combustion process was collected ... -
Spray Mixing in Engines
Probst, Daniel M. (2009-07-08)The mixing of a fuel spray in an optically accessible direct-injection spark-ignition engine was investigated to yield both comparative conclusions between different engine characteristics and fundamental observations of ... -
Transient High-Pressure Hydrogen Jet Measurements
Peterson, Benjamin R. (2009-07-08)Jets produced by prototype multi-hole gaseous injectors were visualized using schlieren methods. Hydrogen and helium were injected at pressures ranging from 1.3 bar to 104 bar into chamber densities ranging from 1.15 to ... -
UNBURNED HYDROCARBON EMISSION MECHANISMS IN SMALL ENGINES
Salazar, Victor M. (2009-07-08)The effect of the liquid fuel in the intake manifold, the ring pack crevices and the oil film on the unburned hydrocarbon (HC) emissions of a spark-ignited, carbureted, air-cooled V-twin engine was studied. Tests were ...