Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5001-5020 of 9564
-
In-Cylinder Pressure Measurement: Requirements for On-Board Engine Control
(The American Society of Mechanical Engineers (ASME), 2008)During these last years, passenger vehicles have been equipped with an increasing number of sensors, in an effort to monitor and control their behavior in terms of global performance and ... -
Cycle-Controlled Water Injection for Steady-State and Transient Emissions Reduction From a Heavy-Duty Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2008)A system for coinjecting mixtures of diesel fuel and water into a heavy-duty diesel engine has been developed and evaluated at the Southwest Research Institute. This system features prototype ... -
Modeling the Performance of a Turbo-Charged Spark Ignition Natural Gas Engine With Cooled Exhaust Gas Recirculation
(The American Society of Mechanical Engineers (ASME), 2008)A variety of gaseous fuels and a wide range of cooled exhaust gas recirculation (EGR) can be used in turbo-charged spark ignition (S.I.) gas engines. This makes the experimental investigation ... -
Scaling Concept for Axial Turbine Stages With Loosely Assembled Friction Bolts: The Linear Dynamic Assessment
(The American Society of Mechanical Engineers (ASME), 2008)In the early 1980s, Siemens developed a last stage fast rotating condensation blading (SK) blade with strongly twisted and tapered profiles for industrial condensing steam turbines, which operate ... -
Damping Performance of Axial Turbine Stages With Loosely Assembled Friction Bolts: The Nonlinear Dynamic Assessment
(The American Society of Mechanical Engineers (ASME), 2008)An entire family of twisted and tapered low pressure steam turbine fast rotating condensation blading (SK) blades with pinned radial root and loosely assembled conical bolts is designed by ... -
Nonlinear Dynamic Characterization of Oil-Free Wire Mesh Dampers
(The American Society of Mechanical Engineers (ASME), 2008)The present work focuses on the dynamic characterization of oil-free wire mesh dampers. The research was aimed at determining nonlinear stiffness and damping coefficients while varying the ... -
Thermohydrodynamic Analysis of Compliant Flexure Pivot Tilting Pad Gas Bearings
(The American Society of Mechanical Engineers (ASME), 2008)A new thermohydrodynamic (THD) analysis for compliant flexure pivot tilting pad gas bearings is presented. Unlike many previous THD analyses on oil-lubricated bearings and gas bearings, the new ... -
Brazing and Wide Gap Repair of X-40 Using Ni-Base Alloys
(The American Society of Mechanical Engineers (ASME), 2008)Co-base superalloys are commonly used for vanes and parts of the combustion chamber in gas turbine engines. The Co-base superalloys are primarily solid solution strengthened and have good ... -
Three-Dimensional Calculations of Evaporative Flow in Compressor Blade Rows
(The American Society of Mechanical Engineers (ASME), 2008)The present paper describes a three-dimensional computational method developed to solve the flow of a two-phase air-water mixture, including the effects of evaporation for a monodispersion of ... -
Development of Elemental Technologies for Advanced Humid Air Turbine System
(The American Society of Mechanical Engineers (ASME), 2008)The advanced humid air turbine (AHAT) system improves the thermal efficiency of gas turbine power generation by using a humidifier, a water atomization cooling (WAC) system, and a heat recovery ... -
Flame Structure and Stabilization Mechanisms in a Stagnation-Point Reverse-Flow Combustor
(The American Society of Mechanical Engineers (ASME), 2008)A novel combustor design, referred to as a stagnation-point reverse-flow (SPRF) combustor, was recently developed to overcome the stability issues encountered with most lean premixed combustion ... -
A Fracture-Mechanics-Based Methodology for Fatigue Life Prediction of Single Crystal Nickel-Based Superalloys
(The American Society of Mechanical Engineers (ASME), 2008)A comprehensive fracture-mechanics-based life prediction methodology is presented for fcc single crystal components based on the computation of stress intensity factors (SIFs), and the modeling of ... -
Multi-Objective Optimization of a Microturbine Compact Recuperator
(The American Society of Mechanical Engineers (ASME), 2008)An automatic approach for the multi-objective shape optimization of microgas turbine heat exchangers is presented. According to the concept of multidisciplinary optimization, the methodology integrates ... -
Qualitative and Quantitative Comparison of Two Promising Oxy-Fuel Power Cycles for CO2 Capture
(The American Society of Mechanical Engineers (ASME), 2008)Since the Kyoto conference, there is a broad consensus that the human emission of greenhouse gases, mainly CO2, has to be reduced. In the power generation sector, there are three main ... -
Influence of Hot Streak Temperature Ratio on Low Pressure Stage of a Vaneless Counter-Rotating Turbine
(The American Society of Mechanical Engineers (ASME), 2008)In order to explore the influence of hot streak temperature ratio on the low pressure stage of a vaneless counter-rotating turbine, three-dimensional multiblade row unsteady Navier–Stokes simulations ... -
On the Use of Thermoacoustic Analysis for Robust Burner Design
(The American Society of Mechanical Engineers (ASME), 2008)Advanced thermoacoustic analysis is now routinely used in gas turbine combustor development. A thermoacoustic approach based on a combination of numerical analysis (CFD and three-dimensional ... -
A Way to Deal With Model-Plant Mismatch for a Reliable Diagnosis in Transient Operation
(The American Society of Mechanical Engineers (ASME), 2008)Least-squares health parameter identification techniques, such as the Kalman filter, have been extensively used to solve diagnosis problems. Indeed, such methods give a good estimate provided that ... -
Flame Extinction Limits of H2‐CO Fuel Blends
(The American Society of Mechanical Engineers (ASME), 2008)The flame extinction limits of syngas (H2‐CO) flames were measured using a twin-flame counterflow burner. Plots of extinction limits (%f: volumetric percent of fuel in air) versus global stretch ... -
Carbon-Free Hydrogen and Electricity From Coal: Options for Syngas Cooling in Systems Using a Hydrogen Separation Membrane Reactor
(The American Society of Mechanical Engineers (ASME), 2008)Conversion of coal to carbon-free energy carriers, H2 and electricity, with CO2 capture and storage may have the potential to satisfy at a comparatively low cost much of the energy requirements ... -
Towards Multiplexed Fiber Delivered Laser Ignition for Natural Gas Engines
(The American Society of Mechanical Engineers (ASME), 2008)The use of laser ignition for advanced gas engines may provide benefits including extension of the lean limit and higher efficiency operation at elevated pressures. This contribution provides a ...