Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3161-3180 of 9564
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Full Parameter Approach for the Intake Port Design of a Four Valve Direct Injection Gasoline Engine
(The American Society of Mechanical Engineers (ASME), 2015)The design of the intake port plays a critical role in the development of modern internal combustion (IC) engines. The traditional method of the intake port design is a timeconsuming process including a huge amount of tests ... -
Investigation on Spray and Flame Lift Off Length of Acetone–Butanol–Ethanol–Diesel Blend in a Constant Volume Chamber
(The American Society of Mechanical Engineers (ASME), 2015)Acetone–butanol–ethanol (ABE), as the intermediate product during producing biobutanol by fermentation, is considered as a promising alternative fuel due to its advanced properties and lower recovery cost. The spray ... -
Transient Gas Turbine Performance Diagnostics Through Nonlinear Adaptation of Compressor and Turbine Maps
(The American Society of Mechanical Engineers (ASME), 2015)Gas turbines are faced with new challenges of increasing flexibility in their operation while reducing their life cycle costs, leading to new research priorities and challenges. One of these challenges involves the ... -
Alternative Fuels Based on Biomass: An Experimental and Modeling Study of Ethanol Cofiring to Natural Gas
(The American Society of Mechanical Engineers (ASME), 2015)In response to the limited resources of fossil fuels as well as to their combustion contributing to global warming through CO2 emissions, it is currently discussed to which extent future energy demands can be satisfied by ... -
An Investigation of Condensation Effects in Supercritical Carbon Dioxide Compressors
(The American Society of Mechanical Engineers (ASME), 2015)Supercritical CO2 (SCO2) power cycles have demonstrated significant performance improvements in concentrated solar and nuclear applications. These cycles promise an increase in thermaltoelectric conversion efficiency of ... -
Dynamic Experimental Investigations of a Bypass Dual Throat Nozzle
(The American Society of Mechanical Engineers (ASME), 2015)The bypass dual throat nozzle (BDTN) does not consume any secondary injection from the other part of the engine, while it can produce steady and efficient vectoring deflection similar to the conventional dual throat nozzle ... -
Study of Time Resolved Vortex Structure of In Cylinder Engine Flow Fields Using Proper Orthogonal Decomposition Technique
(The American Society of Mechanical Engineers (ASME), 2015)The structure of incylinder flow field makes significant impacts on the processes of fuel injection, air–fuel interactions, and flame development in internal combustion engines. In this study, the implementation of ... -
Accurate Radial Vaneless Diffuser One Dimensional Model
(The American Society of Mechanical Engineers (ASME), 2015)A simplified onedimensional model for the performance estimation of vaneless radial diffusers is presented. The starting point of such a model is that angular momentum losses occurring in vaneless diffusers are usually ... -
Synchrotron X Ray Diffraction Measurements Mapping Internal Strains of Thermal Barrier Coatings During Thermal Gradient Mechanical Fatigue Loading
(The American Society of Mechanical Engineers (ASME), 2015)An understanding of the high temperature mechanics experienced in thermal barrier coatings (TBC) during cycling conditions would be highly beneficial to extending the lifespan of the coatings. This study will present results ... -
About the Negative Direct Static Stiffness of Highly Eccentric Straight Annular Seals
(The American Society of Mechanical Engineers (ASME), 2015)Experimental results indicating negative direct static stiffness of highly eccentric straight gas annular seals were very recently presented by Childs and Arthur (2013, “Static Destabilizing Behavior for Gas Annular Seals ... -
Efficient Methods for Predicting Low Pressure Steam Turbine Exhaust Hood and Diffuser Flows at Design and Off Design Conditions
(The American Society of Mechanical Engineers (ASME), 2015)The exhaust hood of a steam turbine is an important area of turbomachinery research as its performance strongly influences the power output of the last stage blades (LSB). This paper compares results from 3D simulations ... -
Analysis of Thrust Bearing Impact on Friction Losses in Automotive Turbochargers
(The American Society of Mechanical Engineers (ASME), 2015)The importance of automotive turbocharger performance is continuously increasing. However, further gains in efficiency are becoming progressively difficult to achieve. The bearing friction losses impact the overall efficiency ... -
Accurate Characterization of Torsional Stiffness of Flexible Disk Couplings
(The American Society of Mechanical Engineers (ASME), 2015)Flexible torsional couplings are used primarily to transmit power between rotating components in industrial power systems, including turbomachinery, while allowing for small amounts of misalignment that may otherwise lead ... -
Enhanced Computational Fluid Dynamics Modeling and Laser Doppler Anemometer Measurements for the Air Flow in an Aero engine Front Bearing Chamber—Part II
(The American Society of Mechanical Engineers (ASME), 2015)A detailed computational study of the airflow through the outer gap of the front bearing of an aeroengine is presented. The reason to carry out this study was to understand the flow through the bearing as a function of the ... -
Optimum Damping Control of the Flexible Rotor in High Energy Density Magnetically Suspended Motor
(The American Society of Mechanical Engineers (ASME), 2015)The rated rotational speed of the magnetically suspended motor (MSM) is always above the bending critical speed to achieve high energy density. The rotor will have a dramatic resonance when it passes the critical speed. ... -
Active Vibration Control of the Flexible Rotor in High Energy Density Magnetically Suspended Motor With Mode Separation Method
(The American Society of Mechanical Engineers (ASME), 2015)Since the mass of the rotor in high energy density magnetically suspended motor (HEDMSM) is always large and there are only three balancing planes on the flexible rotor restricted by the structure of the motor, which means ... -
Chemiluminescence Studies of Coke Oven Gas/O2 Coflow Normal/Inverse Diffusion Flames
(The American Society of Mechanical Engineers (ASME), 2015)In order to analyze the difference between the inverse diffusion flame (IDF) and normal diffusion flame (NDF) under various conditions, the emission spectra of OH* and CH* chemiluminescence in two dimensions measured by ... -
Numerical Investigation on the Time Variant Flow Field and Dynamic Forces Acting in Steam Turbine Inlet Valves
(The American Society of Mechanical Engineers (ASME), 2015)The unsteady flow in inlet valves for large steam turbines used in power stations was investigated using the method of computational fluid dynamics (CFD). As the topology of the flow depends on the stroke and the pressure ... -
Two Phase Flow Heat Transfer and Pressure Drop in Horizontal Scavenge Pipes in an Aero engine
(The American Society of Mechanical Engineers (ASME), 2015)In modern aeroengines, the lubrication system plays a key role due to the demand for high reliability. Oil is used not only for the lubrication of bearings, gears, or seals but it also removes large amounts of the generated ... -
Enhanced Computational Fluid Dynamics Modeling and Laser Doppler Anemometer Measurements for the Air Flow in an Aero engine Front Bearing Chamber—Part I
(The American Society of Mechanical Engineers (ASME), 2015)Modern aeroengine development requires also a gradual increase in the overall effectiveness of lubrication systems. This particularly applies to bearing chambers where a complex twophase flow is formed by the interaction ...