Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3261-3280 of 9564
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Uncertainty Quantification, Rare Events, and Mission Optimization: Stochastic Variations of Metal Temperature During a Transient
(The American Society of Mechanical Engineers (ASME), 2015)Gas turbines are designed to follow specific missions and the metal temperature is usually predicted with deterministic methods. However, in the real life, the mission is subjected to strong variations which can affect the ... -
Numerical Analysis of Fatigue Life Improvement by Optimizing the Startup Phase for a 1000 MW Supercritical Steam Turbine Inner Casing
(The American Society of Mechanical Engineers (ASME), 2015)The fatigue behavior of a specific inner casing of a 1000 MW supercritical steam turbine was investigated during a complete startup phase. The Ramberg–Osgood model and Manson–Coffin strainlife law were used to describe ... -
Flow Field and Flame Dynamics of Swirling Methane and Hydrogen Flames at Dry and Steam Diluted Conditions
(The American Society of Mechanical Engineers (ASME), 2015)The majority of recent stationary gas turbine combustors employ swirling flows for flame stabilization. The swirling flow undergoes vortex breakdown (VB) and exhibits a complex flow field including zones of recirculating ... -
A Holistic Approach to GTCC Operational Efficiency Improvement Studies
(The American Society of Mechanical Engineers (ASME), 2015)Because of the increasing share of renewables in the energy market, part load operation of gas turbine combined cycle (GTCC) power plants has become a major issue. In combination with the variable ambient conditions and ... -
Liquid Jets in Subsonic Air Crossflow at Elevated Pressure
(The American Society of Mechanical Engineers (ASME), 2015)The breakup, penetration, droplet size, and size distribution of a Jet A1 fuel in air crossflow has been investigated with focus given to the impact of surrounding air pressure. Data have been collected by particle Doppler ... -
Time Resolved Particle Image Velocimetry Measurements of Nonreacting Flow Field in a Swirl Stabilized Combustor Without and With Porous Inserts for Acoustic Control
(The American Society of Mechanical Engineers (ASME), 2015)Combustion noise and thermoacoustic instabilities are of primary importance in highly critical applications such as rocket propulsion systems, power generation, and jet propulsion engines. Mechanisms for combustion ... -
Turbofan Engine Health Assessment From Flight Data
(The American Society of Mechanical Engineers (ASME), 2015)The paper presents the use of different approaches to engine health assessment using onwing data obtained over a year from an engine of a commercial shortrange aircraft. The onwing measurements are analyzed with three ... -
Fluid Properties at Gas Turbine Inlet Due to Fogging Considering Evaporation and Condensation Phenomena as Well as Icing Risk
(The American Society of Mechanical Engineers (ASME), 2015)This study reports on numerically calculated thermophysical properties of air entering a gas turbine compressor after passing through an intake duct affected by different cooling techniques. Case of reference is unaffected ... -
Simulation Model of a Passive Decay Heat Removal System for Lead Cooled Fast Reactors
(The American Society of Mechanical Engineers (ASME), 2015)The generation IV lead cooled fast reactors are of particular interest for the Italian research: several influential companies (Ansaldo Nucleare, ENEA) are involved in these important European R&D projects. At present, ... -
Development and Integration of Rain Ingestion Effects in Engine Performance Simulations
(The American Society of Mechanical Engineers (ASME), 2015)Rain ingestion can significantly affect the performance and operability of gas turbine aeroengines. In order to study and understand rain ingestion phenomena at engine level, a performance model is required that integrates ... -
On the Optimization of a Geared Fan Intercooled Core Engine Design
(The American Society of Mechanical Engineers (ASME), 2015)Reduction of CO2 emissions is strongly linked with the improvement of engine specific fuel consumption (SFC), as well as the reduction of engine nacelle drag and weight. One alternative design approach to improving SFC is ... -
Adjoint Method for Shape Optimization in Real Gas Flow Applications
(The American Society of Mechanical Engineers (ASME), 2015)An adjointbased shape optimization approach for supersonic turbine cascades is proposed for application to organic Rankine cycle (ORC) turbines. The algorithm is based on an inviscid discrete adjoint method and encompasses ... -
Modeling and Experimental Investigation of an Oil Free Microcompressor Turbine Unit for an Organic Rankine Cycle Driven Heat Pump
(The American Society of Mechanical Engineers (ASME), 2015)Domestic heating and cooling will more and more have to rely on heat pumps (HPs) in order to support a more rational use of primary energy consumption. The HP market is mainly dominated by electrically driven vapor compression ... -
The Semiclosed Recuperated Cycle With Intercooled Compressors
(The American Society of Mechanical Engineers (ASME), 2015)The gas turbine combined cycle (GTCC) is the best currently available choice, if gaps in the renewable electric power supply need being filled with power from fossil fuels. The GTCC manufacturers are in a fierce competition ... -
Impact of Piping Impedance and Acoustic Characteristics on Centrifugal Compressor Surge and Operating Range
(The American Society of Mechanical Engineers (ASME), 2015)The performance of a centrifugal compressor is usually defined by its head versus flow map, limited by the surge and stall regions. This map is critical to assess the operating range of a compressor for both steady state ... -
On the Effect of Transient In Plane Dynamics of the Compression Ring Upon Its Tribological Performance
(The American Society of Mechanical Engineers (ASME), 2015)Energy losses in an internal combustion engine are either thermal or parasitic. The latter are the mechanical inefficiencies, chiefly as the result of generated friction. Nearly half of these losses are attributed to the ... -
Experimental Performance of an Open Ends, Centrally Grooved, Squeeze Film Damper Operating With Large Amplitude Orbital Motions
(The American Society of Mechanical Engineers (ASME), 2015)Aircraft engines customarily implement squeeze film dampers (SFDs) to dissipate mechanical energy caused by rotor vibration and to isolate the rotor from its structural frame. The paper presents experimental results for ... -
A Remotely Operated Aeroelastically Unstable Low Pressure Turbine Cascade for Turbomachinery Aeromechanics Education and Training—Remote Flutter Lab
(The American Society of Mechanical Engineers (ASME), 2015)The use of advanced pedagogical methodologies in connection with advanced use of modern information technology for delivery enables new ways of communicating, of exchanging knowledge, and of learning that are gaining ... -
Development of Scallop Cut Type Damper Seal for Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2015)This paper deals with a new type of damper seal developed for a highpressure centrifugal compressor. Honeycomb seals and hole pattern seals are popularly used as damper seals and provide superior rotordynamic damping ... -
Use of Pressure Measurements to Determine Effectiveness of Turbine Rim Seals
(The American Society of Mechanical Engineers (ASME), 2015)The ingress of hot gas through the rim seal of a gas turbine depends on the pressure difference between the mainstream flow in the turbine annulus and that in the wheelspace radially inward of the rim seal. In this paper, ...