Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2821-2840 of 9564
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Improved Embeddability for Polymeric Bearing Overlays
(The American Society of Mechanical Engineers (ASME), 2016)Recent engine developments toward higher loads (downsizing) and thinner oil films have increased the severity of plain bearing operating conditions [1]. These factors, combined with lower viscosity oils, have resulted in ... -
Thermodynamic and Economic Analysis and Multi objective Optimization of Supercritical CO2 Brayton Cycles
(The American Society of Mechanical Engineers (ASME), 2016)Supercritical CO2 Brayton cycles (SCO2BC) including the SCO2 singlerecuperated Brayton cycle (RBC) and recompression recuperated Brayton cycle (RRBC) are considered, and flexible thermodynamic and economic modeling ... -
A Continuum Damage Mechanics Based Viscoplastic Model of Adapted Complexity for High Temperature Creep–Fatigue Loading
(The American Society of Mechanical Engineers (ASME), 2016)A continuum damage mechanics (CDM) based viscoplastic constitutive model is established in this study to describe the fully coupling of creep and fatigue behavior. The most significant improvement is the introduction of a ... -
An Approach for Estimating the Effect of Transient Sweep Through a Resonance
(The American Society of Mechanical Engineers (ASME), 2016)The difference of a stationary forced response situation of a turbine or compressor blade relative to a transient resonance sweep is well known and documented in the literature. Different approaches have been used to ... -
Wind Turbine Design Optimization Under Environmental Uncertainty
(The American Society of Mechanical Engineers (ASME), 2016)Wind turbine design optimization is typically performed considering a given wind distribution. However, turbines so designed often end up being used at sites characterized by different wind distributions, resulting in ... -
Markov Nonlinear System Estimation for Engine Performance Tracking
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents a joint state and parameter estimation method for aircraft engine performance degradation tracking. Contrast to previously reported techniques on state estimation that view parameters in the state ... -
Research on Metamodel Based Global Design Optimization and Data Mining Methods
(The American Society of Mechanical Engineers (ASME), 2016)The turbomachinery cascades design is a typical high dimensional computationally expensive and black box problem, thus a metamodelbased design optimization and data mining method is proposed and programed in this work, ... -
Lumped Capacitance and Three Dimensional Computational Fluid Dynamics Conjugate Heat Transfer Modeling of an Automotive Turbocharger
(The American Society of Mechanical Engineers (ASME), 2016)Onedimensional waveaction engine models have become an essential tool within engine development including stages of component selection, understanding system interactions, and control strategy development. Simple turbocharger ... -
Vibration Modeling and Experimental Results of Two Phase Twin Screw Pump
(The American Society of Mechanical Engineers (ASME), 2016)In turbomachines, the transfer of energy between the rotor and the fluid does not—in theory—result in lateral forces on the rotor. In positive displacement machines, on the other hand, the transfer of energy between ... -
Aerodynamic Design of Separate Jet Exhausts for Future Civil Aero engines—Part I: Parametric Geometry Definition and Computational Fluid Dynamics Approach
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents the development of an integrated approach which targets the aerodynamic design of separatejet exhaust systems for future gasturbine aeroengines. The proposed framework comprises a series of fundamental ... -
Development of Low Drift Nickel Based Thermocouples for High Temperature Applications
(The American Society of Mechanical Engineers (ASME), 2016)Recent progress on the new nickelbased thermocouples for hightemperature applications developed at the Department of Materials Science and Metallurgy in the University of Cambridge is described in this paper. Isothermal ... -
Aerodynamic Design of Separate Jet Exhausts for Future Civil Aero engines—Part II: Design Space Exploration, Surrogate Modeling, and Optimization
(The American Society of Mechanical Engineers (ASME), 2016)The aerodynamic performance of the bypass exhaust system is key to the success of future civil turbofan engines. This is due to current design trends in civil aviation dictating continuous improvement in propulsive efficiency ... -
Cylinder Pressure Information Based Postinjection Timing Control for Aftertreatment System Regeneration in a Diesel Engine—Part II: Active Diesel Particulate Filter Regeneration
(The American Society of Mechanical Engineers (ASME), 2016)The successful utilization of a diesel particulate filter (DPF) to reduce particulate matter (PM) in a passenger car diesel engine necessitates a periodic regeneration of the DPF catalyst without deterioration of the ... -
Cylinder Pressure Information Based Postinjection Timing Control for Aftertreatment System Regeneration in a Diesel Engine—Part I: Derivation of Control Parameter
(The American Society of Mechanical Engineers (ASME), 2016)The implementation of aftertreatment systems in passenger car diesel engines, such as a lean NOx trap (LNT) and a diesel particulate filter (DPF), requires an incylinder postinjection (POI) for a periodic regeneration of ... -
Hydraulic Performance Comparison Between the Newly Designed Common Feeding and Standard Common Rail Injection Systems for Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2016)A newgeneration common feeding (CF) fuel injection system without rail has been compared with the standard common rail (CR) apparatus for diesel engine passenger cars. The highpressure pump in the CF apparatus is connected ... -
High Speed Characterization of a Prototype Leaf Seal on an Advanced Seal Test Facility
(The American Society of Mechanical Engineers (ASME), 2016)Advanced contacting seals, such as leaf seals or brush seals, can offer reduced leakage during engine operation when compared to conventional labyrinth seals. The flexible elements of these seals provide better compliance ... -
Investigation of Swirl Ratio Impact on In Cylinder Flow in an SIDI Optical Engine
(The American Society of Mechanical Engineers (ASME), 2016)Advanced powertrain technologies have improved engine performance with higher power output, lower exhaust emission, and better controllability. Chief among them is the development of sparkignition directinjection (SIDI) ... -
The Effect of Environment on Thermal Barrier Coating Lifetime
(The American Society of Mechanical Engineers (ASME), 2016)While the water vapor content of the combustion gas in natural gasfired landbased turbines is ∼10%, it can be 20–85% with coalderived (syngas or H2) fuels or innovative turbine concepts for more efficient carbon capture. ... -
Prediction of Burst Pressure in Multistage Tube Hydroforming of Aerospace Alloys
(The American Society of Mechanical Engineers (ASME), 2016)Bursting, an irreversible failure in tube hydroforming (THF), results mainly from the local plastic instabilities that occur when the biaxial stresses imparted during the process exceed the forming limit strains of the ... -
Influence of Preflame and Postflame Mixing on NOx Formation in a Reacting Premixed Jet in Hot Cross Flow
(The American Society of Mechanical Engineers (ASME), 2016)Axial staging in premixed gas turbine combustors is a promising option for the increase in firing temperature without NOx penalty and for the improvement of turndown ratio, which is limited by the onset of COemissions. The ...