Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2261-2280 of 9564
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Second Law Analysis of Condensing Steam Flows
(The American Society of Mechanical Engineers (ASME), 2018)A numerical second law analysis is performed to determine the entropy production due to irreversibilities in condensing steam flows. In the present work, the classical approach to calculate entropy production rates in ... -
Installed Performance Assessment of an Array of Distributed Propulsors Ingesting Boundary Layer Flow
(The American Society of Mechanical Engineers (ASME), 2018)Conventional propulsion systems are typically represented as uninstalled systems to suit the simple separation between airframe and engine in a podded configuration. However, boundary layer ingesting systems are inherently ... -
Influence of Injection Parameters and Operating Conditions on Ignition and Combustion in Dual-Fuel Engines
(The American Society of Mechanical Engineers (ASME), 2018)Dual-fuel (DF) engines offer great fuel flexibility since they can either run on gaseous or liquid fuels. In the case of diesel pilot-ignited DF engines, the main source of energy is provided by gaseous fuel, whereas the ... -
Investigation of Flame Structure and Soot Formation in a Single Sector Model Combustor Using Experiments and Numerical Simulations Based on the Large Eddy Simulation/Conditional Moment Closure Approach
(The American Society of Mechanical Engineers (ASME), 2018)In this work, a single sector lean burn model combustor operating in pilot only mode has been investigated using both experiments and computations with the main objective of analyzing the flame structure and soot formation ... -
Molten Particulate Impact on Tailored Thermal Barrier Coatings for Gas Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2018)Commercial/military fixed-wing aircraft and rotorcraft engines often have to operate in significantly degraded environments consisting of sand, dust, ash, and other particulates. Marine gas turbine engines are subjected ... -
Experimental and Modeling Study of C1–C3 Hydrocarbon Ignition in the Presence of Nitric Oxide
(The American Society of Mechanical Engineers (ASME), 2018)Nitric oxide (NO) produced during combustion will be present in vitiated air used in many devices. An experimental and modeling investigation of the effect of NO on the ignition of C1–C3 hydrocarbon fuels, namely, CH4, ... -
The Relevance of Damper Pre-Optimization and Its Effectiveness on the Forced Response of Blades
(The American Society of Mechanical Engineers (ASME), 2018)The purpose of this paper is to propose an effective strategy for the design of turbine blades with underplatform dampers (UPDs). The strategy involves damper “pre-optimization,” already proposed by the authors, to exclude, ... -
Capability of the Bayesian Forecasting Method to Predict Field Time Series
(The American Society of Mechanical Engineers (ASME), 2018)This paper addresses the challenge of forecasting the future values of gas turbine measureable quantities. The final aim is the simulation of “virtual sensors” capable of producing statistically coherent measurements aimed ... -
Steady-State Calibration of a Diesel Engine in Computational Fluid Dynamics Using a Graphical Processing Unit-Based Chemistry Solver
(The American Society of Mechanical Engineers (ASME), 2018)The prospect of analysis-driven precalibration of a modern diesel engine is extremely valuable in order to significantly reduce hardware investments and accelerate engine designs compliant with stricter fuel economy ... -
Comparison of Numerical Combustion Models for Hydrogen and Hydrogen-Rich Syngas Applied for Dry-Low-Nox-Micromix-Combustion
(The American Society of Mechanical Engineers (ASME), 2018)The Dry-Low-NOx (DLN) Micromix combustion technology has been developed as low emission combustion principle for industrial gas turbines fueled with hydrogen or syngas. The combustion process is based on the phenomenon of ... -
A New Method for Online Estimation of the Piston Maximum Temperature in Diesel-Natural Gas Dual Fuel Engine
(The American Society of Mechanical Engineers (ASME), 2018) -
Effect of Foil Geometry on the Static Performance of Thrust Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2018)Gas foil bearings can operate in extreme conditions such as high temperature and high rotating speed, compared to traditional bearings. They also provide better damping and stability characteristics and have larger tolerance ... -
Experimental Quantification of Fan Rotor Effects on Inlet Swirl Using Swirl Distortion Descriptors
(The American Society of Mechanical Engineers (ASME), 2018)The prominence of highly integrated engine/airframe architectures in modern commercial aircraft design concepts has led to significant research efforts investigating the use of conventional turbofan engines in unconventional ... -
Impact of Precessing Vortex Core Dynamics on Shear Layer Response in a Swirling Jet
(The American Society of Mechanical Engineers (ASME), 2018)Combustion instability, the coupling between flame heat release rate oscillations and combustor acoustics, is a significant issue in the operation of gas turbine combustors. This coupling is often driven by oscillations ... -
Development and Applications of a Coupled Particle Deposition—Dynamic Mesh Morphing Approach for the Numerical Simulation of Gas Turbine Flows
(The American Society of Mechanical Engineers (ASME), 2018)The presence and accretion of airborne particulates, including ash, sand, dust, and other compounds, in gas turbine engines can adversely affect performance and life of components. Engine experience and experimental work ... -
Effects of Fluid Properties on Spray Characteristics of a Flow-Blurring Atomizer
(The American Society of Mechanical Engineers (ASME), 2018)In order to understand the reasons for the apparent benefits of using a flow-blurring (FB) atomizer in a combustion system, it is necessary to first examine fundamental spray characteristics under nonreacting conditions. ... -
Influence of the Spatial and Temporal Interaction Between Diesel Pilot and Directly Injected Natural Gas Jet on Ignition and Combustion Characteristics
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, pilot-ignited high pressure dual-fuel combustion of a natural gas jet is investigated on a fundamental basis by applying two separate single-hole injectors to a rapid compression expansion machine (RCEM). A ... -
Kinematics of an Articulated Connecting Rod and Its Effect on Simulated Compression Pressures and Port Timings
(The American Society of Mechanical Engineers (ASME), 2018)This study discusses the motion of the articulated connecting rod of an integral-engine compressor and the effect of the kinematics on in-cylinder pressure and port timings. A piston position modeling technique based on ... -
Experimental Dynamic Analysis on a T100 Microturbine Connected With Different Volume Sizes
(The American Society of Mechanical Engineers (ASME), 2018)This paper shows experimental results obtained from a T100 microturbine connected with different volume sizes. The activity was carried out with the test rig developed at the University of Genoa for hybrid system emulation. ... -
Statistical Analysis of Component Failures: A 16 Year Survey on More Than 550 Wind Turbines
(The American Society of Mechanical Engineers (ASME), 2018)A good prediction of the failure ratio of wind turbine (WT) components is pivotal to define a correct maintenance program and reduce the downtime periods. Even a small failure can lead to long downtime periods and high ...