Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5061-5080 of 9564
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Modal Parameter Extraction of a Turboset From High Speed Balance Data
(The American Society of Mechanical Engineers (ASME), 2008)Turbosets used in power generation industry are frequently placed on flexible foundations, which significantly influence the overall dynamics. Establishment of structural models that capture the ... -
Experimental Examination of Prechamber Heat Release in a Large Bore Natural Gas Engine
(The American Society of Mechanical Engineers (ASME), 2008)A common solution in reducing NOx emissions to meet new emission regulations has been lean burn combustion. However, with very lean air∕fuel (A∕F) ratios, both carbon monoxide and hydrocarbon ... -
Asynchronous Dynamic Coefficients of a Three-Lobe Air Bearing
(The American Society of Mechanical Engineers (ASME), 2008)The study of dynamic whirl behavior of air bearings is fundamental for an adequate rotordynamic analysis and future validation of numerical predictions. This work shows the dynamic response of ... -
Development and Validation of a Civil Aircraft Engine Simulation Model for Advanced Controller Design
(The American Society of Mechanical Engineers (ASME), 2008)Computer simulation is a powerful tool for the mechanical and control system design of gas turbines. A high fidelity computer simulation can be used as a substitute for a real engine in many ... -
Autoignition of Hydrogen and Air Inside a Continuous Flow Reactor With Application to Lean Premixed Combustion
(The American Society of Mechanical Engineers (ASME), 2008)With the need to reduce carbon emissions such as CO2, hydrogen is being examined as potential “clean” fuel for the future. One potential strategy is lean premixed combustion, where the fuel ... -
Comparative Study of Two Low CO2 Emission Power Generation System Options With Natural Gas Reforming
(The American Society of Mechanical Engineers (ASME), 2008)Two power plant schemes that reduce CO2 emission and employ natural gas reforming were analyzed and discussed. The first one integrates natural gas reforming technology for efficiency improvement ... -
Modeling Cyclic Variability in Spark-Assisted HCCI
(The American Society of Mechanical Engineers (ASME), 2008)Spark assist appears to offer considerable potential for increasing the speed and load range over which homogeneous charge compression ignition (HCCI) is possible in gasoline engines. Numerous ... -
System Study on Partial Gasification Combined Cycle With CO2 Recovery
(The American Society of Mechanical Engineers (ASME), 2008)A partial gasification combined cycle with CO2 recovery is proposed in this paper. Partial gasification adopts cascade conversion of the composition of coal. Active composition of coal is simply ... -
On Scaling Down Turbines to Millimeter Size
(The American Society of Mechanical Engineers (ASME), 2008)The purpose of this work is to establish the maximum theoretical efficiency that a viscous flow turbine (such as a Tesla turbine) can achieve. This is very much in the spirit of the Betz ... -
Static and Dynamic Characteristics for a Pressure-Dam Bearing
(The American Society of Mechanical Engineers (ASME), 2008)Measured rotordynamic force coefficients (stiffness, damping, and added mass) and static characteristics (eccentricity and attitude angle) of a pressure-dam bearing are presented and compared to ... -
Acoustoelastic Interaction in Combustion Chambers: Modeling and Experiments
(The American Society of Mechanical Engineers (ASME), 2008)To decrease NOx emissions from combustion systems, lean premixed combustion is used. A disadvantage is the higher sensitivity to combustion instabilities, leading to increased sound pressure levels ... -
Effects of Temperature and Particle Size on Deposition in Land Based Turbines
(The American Society of Mechanical Engineers (ASME), 2008)Four series of tests were performed in an accelerated deposition test facility to study the independent effects of particle size, gas temperature, and metal temperature on ash deposits from two ... -
Investigation of the Effect of Incomplete Droplet Prevaporization on NOx Emissions in LDI Combustion Systems
(The American Society of Mechanical Engineers (ASME), 2008)The influence of incomplete liquid fuel prevaporization on the emissions of nitric oxides in a swirl stabilized model gas turbine combustor is investigated experimentally and numerically. The ... -
Active Control of Pressure Oscillations in a Liquid-Fueled Sector Combustor
(The American Society of Mechanical Engineers (ASME), 2008)A system for the active control of combustor pressure oscillations in liquid-fueled, lean, premixed combustors was demonstrated in a three-nozzle sector combustor, using full-scale engine hardware. ... -
A Novel Low NOx Lean, Premixed, and Prevaporized Combustion System for Liquid Fuels
(The American Society of Mechanical Engineers (ASME), 2008)Dry low emission (DLE) systems employing lean, premixed combustion have been successfully used with natural gas in combustion turbines to meet stringent emission standards. However, the burning ... -
An Acoustic-Energy Method for Estimating the Onset of Acoustic Instabilities in Premixed Gas-Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2008)For given acoustic frequencies of premixed gas-turbine combustors, a classical method not currently in use is explored for assessing whether acoustically driven oscillatory combustion will occur. ... -
Simulating Area Conservation and the Gas-Wall Interface for One-Dimensional Based Diesel Particulate Filter Models
(The American Society of Mechanical Engineers (ASME), 2008)Researchers have been using one-dimensional based models of diesel particulate filters (DPFs) for over two decades with good success in comparison to measured experimental data. Recent efforts ... -
Comparison of Primary Flow Measurement Techniques Used During Combined Cycle Tests
(The American Society of Mechanical Engineers (ASME), 2008)One of the most significant contributors to the overall uncertainty of a performance test of a combined cycle steam turbine is the uncertainty of the primary flow measurement. ASME performance ... -
An Improved Phenomenological Soot Formation Submodel for Three-Dimensional Diesel Engine Simulations: Extension to Agglomeration of Particles into Clusters
(The American Society of Mechanical Engineers (ASME), 2008)An extension to a phenomenological submodel for soot formation to include soot agglomeration effects is developed. The improved submodel was incorporated into a commercial computational fluid ... -
Investigation of Mixture Preparation Effects on Gasoline HCCI Combustion Aided by Measurements of Wall Heat Flux
(The American Society of Mechanical Engineers (ASME), 2008)Expanding the range of HCCI operation will be critical for maximizing the fuel economy benefits in future vehicle applications. The mixture stratification, both thermal and compositional, can ...