Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1801-1820 of 9564
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A Physically Consistent Reduced Order Model for Plasma Aeroelastic Control on Compressor Blades
(American Society of Mechanical Engineers (ASME), 2019)Plasma actuators may be successfully employed as virtual control surfaces, located at the trailing edge (TE) of blades, both on the pressure and on the suction side, to control the aeroelastic response of a compressor ... -
Crack Growth Behavior of Full-Scale Turbine Attachment Under Combined High and Low Cycle Fatigue
(American Society of Mechanical Engineers (ASME), 2019)Turbine attachments in the aero-engine are generally subjected to combined high and low cycle fatigue (CCF) loadings, i.e., low cycle fatigue (LCF) loading due to centrifugal and thermal loading stresses superimposed to ... -
Sensitivity Analysis on the Effect of D32 and Dv90 on the Evaporation Efficiency of Gas Turbine Inlet Fogging for Power Augmentation
(American Society of Mechanical Engineers (ASME), 2019)Gas turbine output is strongly dependent on the ambient air temperature. This decrease usually occurs in the hot afternoon during the peak demand for power. One way to counter this drop in output is to cool the inlet air ... -
Multicomponent Evaporation Characteristics of Biodiesel Sprays
(The American Society of Mechanical Engineers (ASME), 2019)The vapor mass fraction distribution of the multicomponent surrogate of diesel and biodiesel fuel is studied using multicomponent evaporation model at engine-relevant conditions. The numerical model is validated with ... -
Nitrogen Oxides Reduction Effect and the Influence Mechanism of Exhaust Valve Lift on a Two-Stroke Marine Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2019)For the two-stroke marine diesel engine, the action of exhaust valve has a significant impact on scavenging and combustion processes and ultimately affects the engine performances and emissions. In order to reduce nitrogen ... -
Modeling Multiphase Effects in CO2 Compressors at Subcritical Inlet Conditions
(The American Society of Mechanical Engineers (ASME), 2019)An advanced numerical framework to model CO2 compressors over a wide range of subcritical conditions is presented in this paper. Thermodynamic and transport properties are obtained through a table look-up procedure with ... -
Assessing Combustion Performance of a Diesel Reciprocating Engine Under Various Fuel Blends Using a Calculus-Statistical Time-Series Vibration Based Approach
(The American Society of Mechanical Engineers (ASME), 2019)The increasing use of biofuels in recent years has resulted in renewed consideration of compression ignition (CI) engines for power generation. However, the differences in chemical properties of these fuels have led to ... -
Assessment of Deterministic Shape Optimizations Within a Stochastic Framework for Supersonic Organic Rankine Cycle Nozzle Cascades
(The American Society of Mechanical Engineers (ASME), 2019)The design of converging–diverging blades for organic Rankine cycle (ORC) applications widely relies on automated shape-optimization processes. As a result, the optimization produces an adapted-nozzle cascade at the design ... -
Three-Dimensional/One-Dimensional Combined Simulation of Deep Surge Loop in a Turbocharger Compressor With Vaned Diffuser
(The American Society of Mechanical Engineers (ASME), 2019)High accuracy simulation of compressor surge origin and growth is an important challenge for designers of systems using compressors likely to develop that severe instability. Indeed, understanding its driving phenomena, ... -
Diesel Fuel Multiple Injection Effects on Emission Characteristics of Diesel Engine Mixed Ammonia Gas Into Intake Air
(The American Society of Mechanical Engineers (ASME), 2019)This study focuses NH3 as an alternative fuel for internal combustion engines, because NH3 is known as a H2 carrier and its combustion does not produce CO2 causing global warming. On the other hand, some reports show that ... -
Trajectory of a Liquid Jet in a High Temperature and Pressure Gaseous Cross Flow
(The American Society of Mechanical Engineers (ASME), 2019)An experimental study of liquid jet injection into subsonic air crossflow is presented. The aim of this study was to relate the jet trajectory to flow parameters, including jet and air velocities, pressure and temperature, ... -
Experimental Investigation of Heat Transfer in Cavities of Steam Turbine Casings Under Generic Test Rig Conditions
(The American Society of Mechanical Engineers (ASME), 2019)This paper presents the first experimental results of the systematic investigation of forced convection heat transfer in scaled generic models of steam turbine casing side spaces with varied geometric dimensions under fully ... -
Effects of Squish Flow on Tangential Flow and Turbulence in a Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2019)Emission and fuel consumption in swirl-supported diesel engines strongly depend on the in-cylinder turbulent flows. But the physical effects of squish flow on the tangential flow and turbulence production are still far ... -
Observations on the Role of Auto-Ignition in Flame Stabilization in Turbulent Non-Premixed Jet Flames in Vitiated Coflow
(The American Society of Mechanical Engineers (ASME), 2019)Turbulent combustion of non-premixed jets issuing into a vitiated coflow is studied at coflow temperatures that do not significantly exceed the fuel auto-ignition temperatures, with the objective of observing the global ... -
Simulation of a Combined Nozzled and Nozzleless Twin-Entry Turbine for Improved Efficiency
(The American Society of Mechanical Engineers (ASME), 2019)This paper discusses the performance and the mass flow characteristics of a twin-entry turbocharger turbine with a fixed nozzle entry and a nozzleless entry for the automotive application. Because the configuration, which ... -
Static and Dynamic Coefficient Measurements for a Thrust Collar Used in an Integrally Geared Compressor
(The American Society of Mechanical Engineers (ASME), 2019)This paper introduces a test facility specifically designed to measure the axial stiffness and damping coefficients of an oil-lubricated thrust collar (TC). The geometry, load, and speeds of the test facility are representative ... -
Experimental Investigation on the Influence of Geometrical Parameters on the Frictional Heat Input and Leakage Performance of Brush Seals
(The American Society of Mechanical Engineers (ASME), 2019)Because of the superior sealing characteristics compared to labyrinth seals, brush seals found an increased spread in turbomachinery in recent years. Their outstanding sealing performance results mainly from their flexibility. ... -
Sensitivity Analysis on the Effect of D32 and Dv90 on the Evaporation Efficiency of Gas Turbine Inlet Fogging for Power Augmentation
(The American Society of Mechanical Engineers (ASME), 2019)Gas turbine output is strongly dependent on the ambient air temperature. This decrease usually occurs in the hot afternoon during the peak demand for power. One way to counter this drop in output is to cool the inlet air ... -
Parametric Reduced Order Models for Bladed Disks With Mistuning and Varying Operational Speed
(The American Society of Mechanical Engineers (ASME), 2019)A considerable amount of research has been conducted to develop reduced order models (ROMs) of bladed disks that can be constructed using single sector calculations when there is mistuning present. A variety of methods ... -
Stratified Two-Phase Flow in Annular Seals
(The American Society of Mechanical Engineers (ASME), 2019)The present study concerns the leakage predictions in pressure annular centered seals operating in a two-phase (gas–liquid) smooth stratified flow pattern. In such systems, the liquid experiences centrifugal forces typically ...