Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3981-4000 of 9564
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Fatigue-Life Prediction Method Based on Small-Crack Theory in an Engine Material
(The American Society of Mechanical Engineers (ASME), 2012)Plasticity effects and crack-closure modeling of small fatigue cracks were used on a Ti-6Al-4V alloy to calculate fatigue lives under various constant-amplitude loading conditions (negative to ... -
Start-Stop Characteristics and Thermal Behavior of a Large Hybrid Airfoil Bearing For Aero-Propulsion Applications
(The American Society of Mechanical Engineers (ASME), 2012)Air/gas foil bearings (AFB) have shown a promise in high-speed micro to mid-sized turbomachinery. Compared to rolling element bearings, AFBs do not require oil lubrication circuits and seals, ... -
Impact of Manufacturing Variability and Nonaxisymmetry on High-Pressure Compressor Stage Performance
(The American Society of Mechanical Engineers (ASME), 2012)This paper introduces an approach for considering manufacturing variability leading to a nonaxisymmetric blading in the computational fluid dynamics simulation of a high-pressure compressor stage. ... -
Effects Due to the Temperature Measurement Section on the Performance Estimation of a Centrifugal Compressor Stage
(The American Society of Mechanical Engineers (ASME), 2012)A wide-ranging analysis was performed by GE Oil & Gas and the University of Florence to investigate the effects on the estimation of centrifugal compressor performance induced by a different ... -
Improved Multiple Point Nonlinear Genetic Algorithm Based Performance Adaptation Using Least Square Method
(The American Society of Mechanical Engineers (ASME), 2012)At off-design conditions, engine performance model prediction accuracy depends largely on its component characteristic maps. With the absence of actual characteristic maps, performance adaptation ... -
Study on the Operational Window of a Swirl Stabilized Syngas Burner Under Atmospheric and High Pressure Conditions
(The American Society of Mechanical Engineers (ASME), 2012)Providing better fuel flexibility for future gas turbine generations is a challenge as the fuel range is expected to become significantly wider (natural gas, syngas, etc.). The technical problem ... -
Advanced Exergoeconomic Analysis Applied to a Complex Energy Conversion System
(The American Society of Mechanical Engineers (ASME), 2012)Exergy-based analyses are important tools for studying and evaluating energy conversion systems. Conventional exergy-based analyses provide us with important information on the design and operation ... -
Fouling Mechanisms in Axial Compressors
(The American Society of Mechanical Engineers (ASME), 2012)Fouling of compressor blades is an important mechanism leading to performance deterioration in gas turbines over time. Fouling is caused by the adherence of particles to airfoils and annulus ... -
Analysis of NOX Formation in an Axially Staged Combustion System at Elevated Pressure Conditions
(The American Society of Mechanical Engineers (ASME), 2012)The objective of this investigation was to study the effect of axially staged injection of methane in the vitiated air cross flow in a two stage combustion chamber on the formation of NOX ... -
Subgrid Scale Combustion Modeling Based on Stochastic Model Parameterization
(The American Society of Mechanical Engineers (ASME), 2012)A new modeling formulation for turbulent chemistry interactions in large-eddy simulation (LES) is presented that is based on a unique application of the linear-eddy model (LEM) that includes ... -
Spray and Flame Structure of a Generic Injector at Aeroengine Conditions
(The American Society of Mechanical Engineers (ASME), 2012)In support of the development of CFD for aeroengine combustion, quantitative measurements of spray properties and temperature were made. A generic swirling air blast injector was designed and ... -
Experimental Investigation of Thermoacoustic Instabilities for a Model Combustor With Varying Fuel Components
(The American Society of Mechanical Engineers (ASME), 2012)In this study, a combustion facility was constructed that includes a flexible fuel supply system to produce synthesis gas using a maximum of three components. The rig with lean premixed burner ... -
Performance of a Direct Injection Diesel Engine Fueled by a Heavy Oil With the Addition of Low Density Polyethylene (LDPE) Polymer
(The American Society of Mechanical Engineers (ASME), 2012)Considering the escalating cost of fossil fuels in correlation with the growing influence of sustainability, the need to seek new alternative fuels is increasing rapidly. This movement has lead ... -
Two Algorithms for the Reliable Estimation of Organic Rankine Cycle Performance
(The American Society of Mechanical Engineers (ASME), 2012)As the demand grows for low-temperature waste heat recovery systems, organic Rankine cycles (ORCs), and other alternatives to traditional steam, Rankine cycles are becoming more common in industry. ... -
Bifurcations of Self-Excited Ducted Laminar Premixed Flames
(The American Society of Mechanical Engineers (ASME), 2012)Bifurcation analysis is performed on experimental data obtained from a simple setup comprising ducted laminar premixed conical flames in order to investigate the features of nonlinear thermoacoustic ... -
Inversion of the Fundamental Thermodynamic Equations for Isentropic Nozzle Flow Analysis
(The American Society of Mechanical Engineers (ASME), 2012)The isentropic flow equations relating the thermodynamic pressures, temperatures, and densities to their stagnation properties are solved in terms of the area expansion and specific heat ratios. ... -
Application of Dielectric Barrier Discharge to Improve the Flashback Limit of a Lean Premixed Dump Combustor
(The American Society of Mechanical Engineers (ASME), 2012)In recent years, lean-premixed (LP) combustors have been widely studied due to their potential to reduce NOx emissions in comparison to diffusion type combustors. However, the fact that the ... -
Ion Current, Combustion and Emission Characteristics in an Automotive Common Rail Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2012)Advanced electronically controlled diesel engines require a feedback signal to the ECU to adjust different operating parameters and meet demands for power, better fuel economy and low emissions. ... -
Air System and Diesel Combustion Modeling for Hardware in the Loop Applications
(The American Society of Mechanical Engineers (ASME), 2012)The development of engine control unit (ECU) systems for series production requires an important validation phase. In order to reduce the number of time consuming and expensive vehicle tests, ... -
Telemetry System Integrated in a Small Gas Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2012)For the purpose of assessing combustion effects in a small gas turbine engine, there was a requirement to evaluate the rotating temperature and dynamic characteristics of the power turbine rotor ...