Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3581-3600 of 9564
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Miller Cycle Regulatable, Two Stage Turbocharging System Design for Marine Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2014)The increasingly stringent NOx emission regulations of the International Marine Organization (IMO) have demanded new design concepts and architectures for diesel engines. The Miller cycle, which reduces the incylinder ... -
Strain Rate and Loading Waveform Effects on an Energy Based Fatigue Life Prediction for AL6061 T6
(The American Society of Mechanical Engineers (ASME), 2014)The energybased lifing method is based on the theory that the cumulative energy in all hysteresis loops of a specimens' lifetime is equal to the energy in a monotonic tension test. Based on this theory, fatigue life can ... -
Simulation of Static Performance of Air Foil Bearings Using Coupled Finite Element and Computational Fluid Dynamics Techniques
(The American Society of Mechanical Engineers (ASME), 2014)The main objective of the current work is to determine a relationship between the top and bump foil's geometry and loadcarrying capacity in a journal compliant generation I air foil bearing, as well as determining the ... -
Side Weld and Bend Method of Manufacturing Compliant Plate Seals
(The American Society of Mechanical Engineers (ASME), 2014)Compliant plate seals are being developed for various turbomachinery sealing applications including gas turbines, steam turbines, aircraft engines, and oil and gas compressors. These seals consist of compliant plates ... -
Labyrinth Seal and Pocket Damper Seal High Pressure Rotordynamic Test Data
(The American Society of Mechanical Engineers (ASME), 2014)The current centrifugal compressor design for the oil & gas market is more and more challenging, and the presence of many competitors is pushing technology towards both a casing size reduction and a rotational speed ... -
Sensitivity of the Numerical Prediction of Turbulent Combustion Dynamics in the LIMOUSINE Combustor
(The American Society of Mechanical Engineers (ASME), 2014)The objective of this study is to investigate the sensitivity and accuracy of the reaction flowfield prediction for the LIMOUSINE combustor with regard to choices in computational mesh and turbulent combustion model. The ... -
Soot Formation and Flame Characterization of an Aero Engine Model Combustor Burning Ethylene at Elevated Pressure
(The American Society of Mechanical Engineers (ASME), 2014)Swirlstabilized, nonpremixed ethylene/air flames were investigated at pressures up to 5 bar to study the effect of different operating parameters on soot formation and oxidation. Focus of the experiments was the establishment ... -
Experimental Investigation of Performance of an Air Blast Atomizer by Planar Laser Sheet Imaging Technique
(The American Society of Mechanical Engineers (ASME), 2014)It is widely recognized that the fuelair mixing process is a critical factor in improving combustion efficiency and in minimizing pollutants such as NOx. Enhancement of fuelair mixing can lead to lower pollutant emissions ... -
Experimental Investigation Into Thermal Behavior of Steam Turbine Components—Temperature Measurements With Optical Probes and Natural Cooling Analysis
(The American Society of Mechanical Engineers (ASME), 2014)The steam turbine cooldown has a significant impact on the cyclic fatigue life. A lower initial metal temperature after standstill results in a higher temperature difference to be overcome during the next startup. Generally, ... -
Optical Measurement of Local and Global Transfer Functions for Equivalence Ratio Fluctuations in a Turbulent Swirl Flame
(The American Society of Mechanical Engineers (ASME), 2014)Equivalence ratio fluctuations are known to be one of the key factors controlling thermoacoustic stability in lean premixed gas turbine combustors. The mixing and thus the spatiotemporal evolution of these perturbations ... -
Interaction Between Swirl Number Fluctuations and Vortex Shedding in a Single Nozzle Turbulent Swirling Fully Premixed Combustor
(The American Society of Mechanical Engineers (ASME), 2014)Flame response to imposed velocity fluctuations is experimentally measured in a singlenozzle turbulent swirling fullypremixed combustor. The flame transfer function is used to quantify the flame's response to imposed ... -
A First and Second Thermodynamics Law Analysis of a Hydrogen Fueled Microgas Turbine for Combined Heat and Power Generation
(The American Society of Mechanical Engineers (ASME), 2014)As is well known, the increasing energy demand requires an efficient use of conventional energy sources, as well as the development of renewable technologies. The distributed generation systems entail significant benefits ... -
Influence of Burner Material, Tip Temperature, and Geometrical Flame Configuration on Flashback Propensity of H2 Air Jet Flames
(The American Society of Mechanical Engineers (ASME), 2014)Flashback is a key operability issue for low emission premixed combustion systems operated on high hydrogen content fuels. Previous work investigated fuel composition impacts on flashback propensity and found that burner ... -
An Experimental Way of Assessing the Application Potential of Emulsified Palm Biodiesel Toward Alternative to Diesel
(The American Society of Mechanical Engineers (ASME), 2014)Amid various methods available to reduce pollutant emissions and to improve performance and combustion characteristics of a diesel engine, emulsified fuel seems to be promising. However, because of its different properties ... -
The Effect of Gas Models on Compressor Efficiency Including Uncertainty
(The American Society of Mechanical Engineers (ASME), 2014)Since isentropic efficiency is widely used in evaluating the performance of compressors, it is essential to accurately calculate this parameter from experimental measurements. Quantifying realistic bounds of uncertainty ... -
Impact of Measurement Uncertainty in the Characteristic Maps of a Turbocharger on Engine Performance
(The American Society of Mechanical Engineers (ASME), 2014)The main goal of current engine development is to increase power density and efficiency and to minimize engine emissions. The idea is to obtain the desired power output with a highly charged combustion engine in combination ... -
Effects of Cavity on the Performance of Dual Throat Nozzle During the Thrust Vectoring Starting Transient Process
(The American Society of Mechanical Engineers (ASME), 2014)The dual throat nozzle (DTN) technique is capable to achieve higher thrustvectoring efficiencies than other fluidic techniques, without compromising thrust efficiency significantly during vectoring operation. The excellent ... -
Design and Experimental Study of an Over Under TBCC Exhaust System
(The American Society of Mechanical Engineers (ASME), 2014)Turbinebased combinedcycle (TBCC) propulsion systems have been a topic of research as a means for more efficient flight at supersonic and hypersonic speeds. The present study focuses on the fundamental physics of the complex ... -
Gas Turbine Combined Cycle Dynamic Simulation: A Physics Based Simple Approach
(The American Society of Mechanical Engineers (ASME), 2014)This paper describes a simplified physicsbased method derived from fundamental relationships to accurately predict the dynamic response of the steam bottoming cycle of a combined cycle power plant to the changes in gas ... -
Steady Modeling of a Turbocharger Turbine for Automotive Engines
(The American Society of Mechanical Engineers (ASME), 2014)Nowadays the turbocharging technique is playing a fundamental role in improving automotive engine performance and reducing fuel consumption and the exhaust emissions, in sparkignition and compression ignition engines, as ...