Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2321-2340 of 9564
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Closure to “Discussion of ‘Beyond Brayton Cycle: It is Time to Change the Paradigm'” (S. Can Gülen, 2018, “Beyond Brayton Cycle: It is Time to Change the Paradigm,” 140(11), p. 111703)
(The American Society of Mechanical Engineers (ASME), 2018) -
Experimental Investigation of Self-Excited Combustion Instabilities in a Lean, Premixed, Gas Turbine Combustor at High Pressure
(The American Society of Mechanical Engineers (ASME), 2018)Self-excited combustion instabilities in a high pressure, single-element, lean, premixed, natural gas (NG) dump-combustor are investigated. The combustor is designed for optical access and instrumented with high frequency ... -
Heat Transfer in the Core Compressor Under Ice Crystal Icing Conditions
(The American Society of Mechanical Engineers (ASME), 2018)It has been recognized in recent years that high altitude atmospheric ice crystals pose a threat to aircraft engines. Instances of damage, surge, and shutdown have been recorded at altitudes significantly greater than those ... -
Preliminary Design Method for Dense-Gas Supersonic Axial Turbine Stages
(The American Society of Mechanical Engineers (ASME), 2018)A fast preliminary design methodology for supersonic organic Rankine cycle (ORC) stator and rotor axial turbine blades with low degree of reaction is presented. First, the stator and rotor blade mean-line profiles are ... -
Aeroacoustic Analysis of Low-Speed Axial Fans With Different Rotational Speeds in the Design Point
(The American Society of Mechanical Engineers (ASME), 2018)One of the main design decisions in the development of low-speed axial fans is the right choice of the blade loading versus rotational speed, since a target pressure rise could either be achieved with a slow spinning fan ... -
Measurement and Prediction of Centrifugal Compressor Axial Forces During Surge—Part I: Surge Force Measurements
(The American Society of Mechanical Engineers (ASME), 2018)Centrifugal compressor impellers and shafts are subject to severe fluctuating axial and radial forces when operating in surge. These forces can cause severe damage to the close clearance components of a centrifugal compressor ... -
Experimental Analysis of Cyclical Dispersion in Compression-Ignited Versus Spark-Ignited Engines and Its Significance for Combustion Noise Numerical Modeling
(The American Society of Mechanical Engineers (ASME), 2018)As noise pollution remains one of the biggest hurdles posed by thermal engines, increasing efforts are made to alleviate the generation of combustion noise from the early design stage of the chamber. Since the complexity ... -
Effects of Effusion and Film Cooling Jet Momenta on Combustor Flow Fields
(The American Society of Mechanical Engineers (ASME), 2018)The effects of effusion and film cooling momenta on combustor flow fields are investigated. Steady, compressible three-dimensional (3D) simulations are performed on a single-swirler combustor using Reynolds-averaged ... -
Automated Design Optimization of a Small-Scale High-Swirl Cavity-Stabilized Combustor
(The American Society of Mechanical Engineers (ASME), 2018)A numerical optimization study is performed on a small-scale high-swirl cavity-stabilized combustor. A parametric geometry is created in cad software that is coupled with meshing software. The latter automatically transfers ... -
Impact of Flow Unsteadiness on Steady-State Gas-Path Stagnation Temperature Measurements
(The American Society of Mechanical Engineers (ASME), 2018)Steady-state stagnation temperature probes are used during gas turbine engine testing as a means of characterizing turbomachinery component performance. The probes are located in the high-velocity gas-path, where temperature ... -
An Experimental Investigation of the Dynamics of a Blade With Two Under-Platform Dampers
(The American Society of Mechanical Engineers (ASME), 2018)Several experimental apparatuses have been designed in the past to evaluate the effectiveness of under-platform dampers. Most of these experimental setups allow to measure the overall damper efficiency in terms of reduction ... -
Computational Fluid Dynamics Simulations of the Effect of Water Injection Characteristics on TSCI: A New, Load-Flexible, Advanced Combustion Concept
(The American Society of Mechanical Engineers (ASME), 2018)Homogeneous charge compression ignition (HCCI) combustion has the potential for high efficiency with very low levels of NOx and soot emissions. However, HCCI has thus far only been achievable in a laboratory setting due ... -
Analysis of a Fuel Flexible Micro Gas Turbine Combustor Through Numerical Simulations
(The American Society of Mechanical Engineers (ASME), 2018)The work in this paper investigates on how a fuel flexible microgas turbine (MGT) combustion chamber, developed by ANSALDO ENERGIA and installed in a Turbec T100 P MGT, can operate when transferring from natural gas (NG) ... -
Detailed Analysis of the Wake Structure of a Straight-Blade H-Darrieus Wind Turbine by Means of Wind Tunnel Experiments and Computational Fluid Dynamics Simulations
(The American Society of Mechanical Engineers (ASME), 2018)Darrieus vertical axis wind turbines (VAWTs) have been recently identified as the most promising solution for new types of applications, such as small-scale installations in complex terrains or offshore large floating ... -
Energy Balance and Power Loss Pathway Study of a 120 cc Four-Stroke Internal Combustion Engine
(The American Society of Mechanical Engineers (ASME), 2018)Efforts to improve the range and endurance of group 2 (10–25 kg), internal combustion engine (ICE) powered unmanned aerial vehicles (UAVs) have been underway for several years at Air Force Research Laboratory (AFRL). To ... -
Experimental and Analytical Assessment of Cavity Modes in a Gas Turbine Wheelspace
(The American Society of Mechanical Engineers (ASME), 2018)Fast response pressure data acquired in a high-speed 1.5-stage turbine hot gas ingestion rig (HGIR) show the existence of pressure oscillation modes in the rim-seal-wheelspace cavity of a high pressure gas turbine stage ... -
Pulsation-Amplitude-Dependent Flame Dynamics of High-Frequency Thermoacoustic Oscillations in Lean-Premixed Gas Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents the experimental investigation of pulsation-amplitude-dependent flame dynamics associated with transverse thermoacoustic oscillations at screech level frequencies in a generic gas turbine combustor. ... -
Toward Investigation of External Oil Flow From a Journal Bearing in an Epicyclic Gearbox
(The American Society of Mechanical Engineers (ASME), 2018)High loads and bearing life requirements make journal bearings the preferred choice for use in high-power, planetary gearboxes in jet engines. With the planet gears rotating about their own axis and orbiting around the sun ... -
Low Load Operation Range Extension by Autothermal On-Board Syngas Generation
(The American Society of Mechanical Engineers (ASME), 2018)The increasing amount of volatile renewable energy sources drives the necessity of flexible conventional power plants to compensate for fluctuations of the power supply. Gas turbines in a combined cycle power plant (CCPP) ... -
Modal Analyses of an Axial Turbine Blisk With Intentional Mistuning
(The American Society of Mechanical Engineers (ASME), 2018)The potential of intentional mistuning to reduce the maximum forced response is analyzed within the development of an axial turbine blisk for ship diesel engine turbocharger applications. The basic idea of the approach is ...