Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5661-5680 of 9564
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A Multipoint Measurement Technique for the Enhancement of Force Measurement With Active Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2003)Active magnetic bearings (AMBs) have the unique capability to act concurrently as support bearings and load cells for measuring shaft forces. Current state-of-the-art methods for force measurement ... -
Rotordynamic and Bearing Upgrade of a High-Speed Turbocharger
(The American Society of Mechanical Engineers (ASME), 2003)The paper discusses the redesign of a high-speed turbocharger for improved bearing life and mechanical operation. The bearings were changed from a pair of combination journal/thrust bearings to ... -
A Thermodynamic Analysis of Tubular Solid Oxide Fuel Cell Based Hybrid Systems
(The American Society of Mechanical Engineers (ASME), 2003)The goals of a research program recently completed at the University of California, Irvine were to develop analysis strategy for solid oxide fuel cell (SOFC) based systems, to apply the analysis ... -
Studies of Jet Fuel Freezing by Differential Scanning Calorimetry and Cold-Stage Microscopy
(The American Society of Mechanical Engineers (ASME), 2003)Aircraft which fly at high altitude or encounter extremely cold environments have the potential for fuel freezing and, consequently, catastrophic failure of the fuel system. Thus, it is important ... -
Multiflame Patterns in Swirl-Driven Partially Premixed Natural Gas Combustion
(The American Society of Mechanical Engineers (ASME), 2003)Five different flame states are identified in a compact combustion chamber that is fired by a 30 kW swirl-stabilized partially premixed natural gas burner working at atmospheric pressure. These ... -
Low NOx Emission From an Ambient Pressure Diffusion Flame Fired Gas Turbine Cycle (APGC)
(The American Society of Mechanical Engineers (ASME), 2003)The prospects of reduced NOx emission, improved efficiency, stable, and oscillation-free combustion, and reduced construction costs achieved by an “Inverted Brayton Cycle” applied to midsize (0.5 ... -
A High-Efficiency Solid Oxide Fuel Cell Hybrid Power System Using the Mercury 50 Advanced Turbine Systems Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2003)The conceptual design of a 20 MWe-class hybrid power generating system that integrates a Siemens Westinghouse pressurized solid oxide fuel cell generator with a Mercury 50 gas turbine is ... -
Instability of a Premix Burner With Nonmonotonic Pressure Drop Characteristic
(The American Society of Mechanical Engineers (ASME), 2003)Instabilities in combustion systems have frequently been reported to occur when slight changes in operating conditions lead to significant and abrupt changes in flame shape or flame position, ... -
Development of Low NOx Combustion Technology in Medium-Btu Fueled 1300°C-Class Gas Turbine Combustor in an Integrated Coal Gasification Combined Cycle
(The American Society of Mechanical Engineers (ASME), 2003)The development of integrated coal gasification combined cycle (IGCC) systems ensures higher thermal efficiency and environmentally sound options for supplying future coal utilizing power generation ... -
Influence of the Combustor Aerodynamics on Combustion Instabilities From Equivalence Ratio Fluctuations
(The American Society of Mechanical Engineers (ASME), 2003)Gas turbine combustors are often susceptible to self-excited oscillations, which lead to unacceptable levels of pressure, velocity, and heat release fluctuations. Although instabilities can occur ... -
Analysis of Oil Film Thickness on a Piston Ring of Diesel Engine: Effect of Oil Film Temperature
(The American Society of Mechanical Engineers (ASME), 2003)This paper describes an analysis of oil film thickness on a piston ring of a diesel engine. The analysis of the oil film thickness has been performed by using Reynolds equation and unsteady, ... -
Effect of Biodiesel Utilization of Wear of Vital Parts in Compression Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2003)The combustion related properties of vegetable oils are somewhat similar to diesel oil. Neat vegetable oils or their blends with diesel, however, pose various long-term problems in compression ... -
Temporally Resolved Two-Dimensional Spectroscopic Study on the Effect of Highly Preheated and Low Oxygen Concentration Air on Combustion
(The American Society of Mechanical Engineers (ASME), 2003)Spontaneous emission spectroscopy has been applied to measure the time-resolved temperature profiles of gaseous fuel flames using high temperature and low oxygen concentration combustion air. Two ... -
Improvement of the Dynamic Characteristic of an Automotive Engine by a Turbocharger Assisted by an Electric Motor
(The American Society of Mechanical Engineers (ASME), 2003)Turbocharging and subsequent charge cooling of the working medium usually causes increase of the mean effective pressure in an automotive diesel engine. Poor performance during the engine load ... -
Exhaust Particulate Matter Emission Factors and Deterioration Rate for In-Use Motor Vehicles
(The American Society of Mechanical Engineers (ASME), 2003)Recent measurements and modeling of primary exhaust particulate matter (PM) emissions from both gasoline and diesel-powered motor vehicles suggest that many vehicles produce PM at rates substantially ... -
Reduction of NOx and Particulate Emissions by Using Oxygen-Enriched Combustion Air in a Locomotive Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2003)This paper discusses operational and emissions results obtained with a locomotive (two-cylinder, EMD 567B) research diesel engine when oxygen-enriched combustion air is used. An operating regime ... -
A Nonequilibrium Turbulence Dissipation Correction and Its Influence on Pollution Predictions for DI Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2003)A correction for the turbulence dissipation rate, based on nonequilibrium turbulence considerations from rapid distortion theory, has been derived and implemented in combination with the RNG k-ε ... -
Response Surface Method Optimization of a High-Speed Direct-Injection Diesel Engine Equipped With a Common Rail Injection System
(The American Society of Mechanical Engineers (ASME), 2003)To overcome the tradeoff between NOx and particulate emissions for future diesel vehicles and engines it is necessary to seek methods to lower pollutant emissions. The desired simultaneous ... -
The Use of Neural Nets for Matching Fixed or Variable Geometry Compressors With Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2003)A technique which uses trained neural nets to model the compressor in the context of a turbocharged diesel engine simulation is introduced. This technique replaces the usual interpolation of ... -
Dynamic Response of Automotive Catalytic Converters to Variations in Air-Fuel Ratio
(The American Society of Mechanical Engineers (ASME), 2003)The automotive catalytic converters, which are employed to reduce engine exhaust emissions, operate in transient conditions under all modes of operation. The fluctuation in air-fuel ratio is a ...