Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 4341-4360 of 9564
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Optical Investigation Into Wall Wetting From Late-Cycle Post-Injections Used for Diesel Particulate Filter Regeneration
(The American Society of Mechanical Engineers (ASME), 2011)Wall wetting phenomena were investigated in a light-duty diesel optical engine, operating under typical diesel particulate filter regeneration conditions, through the use of liquid spray imaging ... -
An Experimental Investigation of Low-Octane Gasoline in Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2011)Conventional combustion techniques struggle to meet the current emissions norms. In particular, oxides of nitrogen (NOx) and particulate matter (PM) emissions have limited the utilization of diesel ... -
Spark Advance Real-Time Optimization Based on Combustion Analysis
(The American Society of Mechanical Engineers (ASME), 2011)One of the most effective factors influencing performance, efficiency, and pollutant emissions of internal combustion engines is the combustion phasing: In gasoline engines, electronic control units ... -
Experimental Analyses of a First Generation Foil Bearing: Startup Torque and Dynamic Coefficients
(The American Society of Mechanical Engineers (ASME), 2011)This paper presents the results of the experimental analysis of static and dynamic characteristics of a generation 1 foil bearing of 38.1 mm diameter and L/D=1. The test rig is of floating ... -
Identification and Prediction of Force Coefficients in a Five-Pad and Four-Pad Tilting Pad Bearing for Load-on-Pad and Load-Between-Pad Configurations
(The American Society of Mechanical Engineers (ASME), 2011)This paper presents the identification of the rotordynamic force coefficients for direct lubrication five-pad and four-pad tilting pad bearings. The bearing is 110 mm in diameter with a L/D of ... -
Fatigue Properties of Narrow and Wide Gap Braze Repaired Joints
(The American Society of Mechanical Engineers (ASME), 2011)With the increasing utilization of braze repair in the gas turbine industry, the properties of braze joints under simulated service conditions become vital in selecting braze repair over other ... -
Heat Transfer and Pressure Losses of W-Shaped Small Ribs at High Reynolds Numbers for Combustor Liner
(The American Society of Mechanical Engineers (ASME), 2011)The present study investigates the heat transfer performance of W-shaped ribs in a rectangular channel with typical geometries and flow conditions for a combustor liner cooling passage. In order ... -
Gas Turbine Power Augmentation: Parametric Study Relating to Fog Droplet Size and Its Influence on Evaporative Efficiency
(The American Society of Mechanical Engineers (ASME), 2011)Several gas turbine power augmentation techniques are available to counter the detrimental drop in power and thermal efficiency that occur at high ambient temperatures. Inlet fogging and wet ... -
High-Temperature Performance of Cast CF8C-Plus Austenitic Stainless Steel
(The American Society of Mechanical Engineers (ASME), 2011)Covers and casings of small to medium size gas turbines can be made from cast austenitic stainless steels, including grades such as CF8C, CF3M, or CF10M. Oak Ridge National Laboratory and ... -
A Probabilistic Secondary Flow System Design Process for Gas Turbine Engines
(The American Society of Mechanical Engineers (ASME), 2011)Gas turbine engine secondary flow systems are sensitive to variation in part dimensions, clearances, flow coefficients, swirl ratios, head loss factors, tolerances, boundary conditions, etc. This ... -
Establishment of a High Quality Database for the Acoustic Modeling of Perforated Liners
(The American Society of Mechanical Engineers (ASME), 2011)Perforated liners, especially in combination with a bias flow, are very effective sound absorbers. When appplied to gas turbine combustors, they can suppress thermo-acoustic instabilities and thus ... -
Mineral-Metal, Multiphase Coatings to Protect Combustion Chamber Components Against Hot-Gas Corrosion and Thermal Loading
(The American Society of Mechanical Engineers (ASME), 2011)Many marine and stationary engines operate on fuels that contain corrosive elements, with the result that some highly loaded combustion chamber components must be replaced frequently. Märkisches ... -
Three- and Seven-Point Optimally Weighted Recursive Median Filters for Gas Turbine Diagnostics
(The American Society of Mechanical Engineers (ASME), 2011)Measured health signals incorporate significant details about any malfunction in a gas turbine. The attenuation of noise and removal of outliers from these health signals while preserving important ... -
Compressive Creep Testing of Thermal Barrier Coated Nickel-Based Superalloys
(The American Society of Mechanical Engineers (ASME), 2011)Turbine airfoils have complex geometries and, during service operation, are subjected to complex loadings. In most publications, results are typically reported for either uniaxial, isothermal tensile ... -
Computations for Unsteady Compressible Flows in a Multistage Steam Turbine With Steam Properties at Low Load Operations
(The American Society of Mechanical Engineers (ASME), 2011)A computational technique for multistage steam turbines, which can allow for thermodynamic properties of steam, is presented. Conventional three-dimensional multistage calculations for unsteady flows ... -
Gas Turbine Gas Fuel Composition Performance Correction Using Wobbe Index
(The American Society of Mechanical Engineers (ASME), 2011)Gas turbine thermal performance is dependent on many external conditions, including fuel gas composition. Measured performance must be corrected to specified reference conditions prior to comparison ... -
Comparison of Filter Smoke Number and Elemental Carbon Mass From Partially Premixed Low Temperature Combustion in a Direct-Injection Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2011)Partially premixed low temperature combustion (LTC) is an established advanced engine strategy that enables the simultaneous reduction of soot and NOx emissions in diesel engines. Measuring extremely ... -
Investigation of the Roles of Flame Propagation, Turbulent Mixing, and Volumetric Heat Release in Conventional and Low Temperature Diesel Combustion
(The American Society of Mechanical Engineers (ASME), 2011)In this work, a multimode combustion model that combines a comprehensive kinetics scheme for volumetric heat release and a level-set-based model for turbulent flame propagation is applied over ... -
Laminar Flame Speed Measurements and Modeling of Pure Alkanes and Alkane Blends at Elevated Pressures
(The American Society of Mechanical Engineers (ASME), 2011)Alkanes such as methane, ethane, and propane make up a large portion of most natural gas fuels. Natural gas is the primary fuel used in industrial gas turbines for power generation. Because ... -
Optimum Positioning of Ports in the Limaçon Gas Expanders
(The American Society of Mechanical Engineers (ASME), 2011)Positive displacement expanders are quickly gaining popularity in the fields of micropower generation and refrigeration engineering. Unlike turbomachines, expanders can handle two-phase flow applications ...