Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2161-2180 of 9564
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Rotor Damped Natural Frequencies and Stability Under Reduced Oil Supply Flow Rates to Tilting-Pad Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2018)Reduced oil supply flow rates in fluid film bearings can cause cavitation, or lack of a fully developed film layer, over one or more of the pads due to starvation. Reduced oil flow has the well-documented effects of higher ... -
Subsynchronous Vibration Patterns Under Reduced Oil Supply Flow Rates
(The American Society of Mechanical Engineers (ASME), 2018)Reduced oil supply flow rates in fluid film bearings can cause cavitation, or lack of a fully developed hydrodynamic film layer, at the leading edge of the bearing pads. Reduced oil flow has the well-documented effects of ... -
Investigation on the Effect of Surface Wettability on a Two-Phase Flow in a Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2018)In recent years overspray fogging has become a powerful means for power augmentation of industrial gas turbines. Despite the positive thermodynamic effect on the cycle droplets entering the compressor increase the risk of ... -
Development of Highly Durable Thermal Barrier Coating by Suppression of Thermally Grown Oxide
(The American Society of Mechanical Engineers (ASME), 2018)Durability of thermal barrier coating (TBC) systems is important because of recent rising of turbine inlet temperature (TIT) for improved efficiency of industrial gas turbine engines. However, high-temperature environment ... -
Experimental Investigation of Inlet Distortion Effect on Performance of a Micro Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2018)An experimental study has been carried out to determine how inlet total-pressure distortion affects the performance of a micro gas turbine. An inlet simulator is designed and developed to produce and measure distortion ... -
Experimental Investigation of Vibrational and Acoustic Phenomena for Detecting the Stall and Surge of a Multistage Compressor
(The American Society of Mechanical Engineers (ASME), 2018)Nowadays, the operative range limit of compressors is still a key aspect of the research into turbomachinery. In particular, the study of the mass flow rate lower limit represents a significant factor in order to predict ... -
Measurement and Prediction of Centrifugal Compressor Axial Forces During Surge—Part II: Dynamic Surge Model
(The American Society of Mechanical Engineers (ASME), 2018)The force acting on centrifugal compressors is an important parameter to be considered throughout the operating life of these turbomachines. When the compressor is operating in surge conditions, these forces can become ... -
Experimental Investigation of the Grouped Blade Vibration for Steam Turbine by Noncontact Sensors
(The American Society of Mechanical Engineers (ASME), 2018)All turbine blades have mistuned structures caused by manufacturing variations within the manufacturing tolerance, such as the geometrical deviations and variance of material properties. The mistuning effect has a known ... -
Integrated Approach for Steam Turbine Thermostructural Analysis and Lifetime Prediction at Transient Operations
(The American Society of Mechanical Engineers (ASME), 2018)In order to achieve the highest power plant efficiency, original equipment manufacturers continuously increase turbine working parameters (steam temperatures and pressures), improve components design, and modify start-up ... -
Fabrication and Characterization of Additive Manufactured Nickel-Based Oxide Dispersion Strengthened Coating Layer for High-Temperature Application
(The American Society of Mechanical Engineers (ASME), 2018)Increasing turbine inlet temperature is important for improving the efficiency of gas turbine engine. Elevated thermal load causes severe oxidation and corrosion for base alloy in turbine airfoils. To survive in this extreme ... -
An Investigation of Combustion Properties of Butanol and Its Potential for Power Generation
(The American Society of Mechanical Engineers (ASME), 2018)Over the last years, global concerns about energy security and climate change have resulted in many efforts focusing on the potential utilization of nonpetroleum-based, i.e., bioderived, fuels. In this context, n-butanol ... -
Set-Point Adaptation Strategy of Air Systems of Light-Duty Diesel Engines for NOx Emission Reduction Under Acceleration Conditions
(The American Society of Mechanical Engineers (ASME), 2018)Modern diesel engines equip the exhaust gas recirculation (EGR) system because it can suppress NOx emissions effectively. However, since a large amount of exhaust gas might cause the degradation of drivability, the control ... -
Experimental and Numerical Investigation on Windage Power Losses in High Speed Gears
(The American Society of Mechanical Engineers (ASME), 2018)Enhancing the efficiency of gearing systems is an important topic for the development of future aero-engines with low specific fuel consumption. An evaluation of its structure and performance is mandatory in order to ... -
Methods for the Calculation of Thermoacoustic Stability Boundaries and Monte Carlo-Free Uncertainty Quantification
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Electrochemical Carbon Separation in a SOFC–MCFC Polygeneration Plant With Near-Zero Emissions
(The American Society of Mechanical Engineers (ASME), 2018)The modularity and high efficiency at small-scale make high temperature (HT) fuel cells an interesting solution for carbon capture and utilization at the distributed generation (DG) scale when coupled to appropriate use ... -
Experimental Study of Aeronautical Ignition in a Swirled Confined Jet-Spray Burner
(The American Society of Mechanical Engineers (ASME), 2018)Aeronautical gas turbine ignition is still not well understood and its management and control are mandatory for new lean-burner designs. The fundamental aspects of swirled confined two-phase flow ignition are addressed in ... -
Effects of Fuel Molecular Weight on Emissions in a Jet Flame and a Model Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 2018)The objective of this study is to understand the effects of fuel volatility on soot emissions. This effect is investigated in two experimental configurations: a jet flame and a model gas turbine combustor. The jet flame ... -
Cycle-to-Cycle Feedback for Combustion Control of Spark Advance at the Misfire Limit
(The American Society of Mechanical Engineers (ASME), 2018)At a given speed and load, the spark advance (SA) is tuned to reach the maximum brake torque (MBT) timing to maximize efficiency. The use of exhaust gas recirculation (EGR) can further improve fuel economy (FE) at the same ... -
Computational Fluid Dynamics Investigation of a Core-Mounted Target-Type Thrust Reverser—Part 2: Reverser Deployed Configuration
(The American Society of Mechanical Engineers (ASME), 2018)Core-mounted target-type thrust reverser (CMTTTR) design was proposed by NASA in the second half of the 90 s. NASA carried out several experiments at static conditions, and their acquired results suggested that the performance ... -
Low-Order Modeling of Combustion Noise in an Aero-Engine: The Effect of Entropy Dispersion
(The American Society of Mechanical Engineers (ASME), 2018)The present work studies the effect of entropy dispersion on the level of combustion noise at the turbine outlet of the Rolls-Royce ANTLE aero-engine. A new model for the decay of entropy waves, based on modeling dispersion ...