Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5481-5500 of 9564
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Hardware-in-the-Loop Simulation Study on the Fuel Control Strategy of a Gas Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2005)A hardware-in-the-loop simulation of a three-shaft gas turbine engine for ship propulsion was established. This system is composed of computers, actual hardware, measuring instruments, interfaces ... -
Fine Particulate Formation During Switchgrass/Coal Cofiring
(The American Society of Mechanical Engineers (ASME), 2005)Experiments to examine the effects of biomass/coal cofiring on fine particle formation were performed in the Sandia Multi-Fuel Combustor using fuels of pure coal, three combinations of switchgrass ... -
Spectroscopic Measurements of High Emissivity Materials Using Two-Dimensional Two-Color Thermometry
(The American Society of Mechanical Engineers (ASME), 2005)Radiative heat transfer characteristics from the surface of a substance coated with a high-emissivity material have been examined from the measured two-dimensional (2D) temperature distribution ... -
Methods for Specific Emission Evaluation in Spark Ignition Engines Based on Calculation Procedures of Air-Fuel Ratio: Development, Assessment, and Critical Comparison
(The American Society of Mechanical Engineers (ASME), 2005)New computational procedures are proposed for evaluating the exhaust brake specific mass emissions of each pollutant species in internal combustion (IC) engines. The procedures start from the ... -
Coupled Simulations of Nozzle Flow, Primary Fuel Jet Breakup, and Spray Formation
(The American Society of Mechanical Engineers (ASME), 2005)Presented are two approaches for coupled simulations of the injector flow with spray formation. In the first approach the two-fluid model is used within the injector for the cavitating flow. ... -
Feasibility Study of an On-Board Natural Gas to Dimethyl Ether Reactor for Dimethyl Ether Preinjection and Enhanced Ignition
(The American Society of Mechanical Engineers (ASME), 2005)Dual fuel (CI) engines provide an excellent means of maintaining high thermal efficiency and power while reducing emissions. This is particularly true in situations where the main CI fuel does ... -
Combined Fatigue Life Test and Extrapolation of Turbine Disk Mortise at Elevated Temperature
(The American Society of Mechanical Engineers (ASME), 2005)To investigate the crack failure of a certain turbine disc mortise, a test system with a new low- and high-cycle noninterfering loading scheme was established to study the low- and high-cycle ... -
Multidimensional Predictions of In-Cylinder Turbulent Flows: Contribution to the Assessment of k-ε Turbulence Model Variants for Bowl-in-Piston Engines
(The American Society of Mechanical Engineers (ASME), 2005)Multidimensional computational fluid dynamics (CFD) codes with reliable turbulence models are useful investigation and design tools for internal combustion engines, in-cylinder flow phenomena being ... -
Rotordynamic Coefficients for a Tooth-on-Stator Labyrinth Seal at 70 Bar Supply Pressures: Measurements Versus Theory and Comparisons to a Hole-Pattern Stator Seal
(The American Society of Mechanical Engineers (ASME), 2005)Rotor dynamic and leakage coefficients are presented for a labyrinth seal that was tested at a supply pressure of 70 bar-a and speeds up to 20,200 rpm. Tests were conducted at clearances of ... -
Sensitivity of Tuned Bladed Disk Response to Frequency Veering
(The American Society of Mechanical Engineers (ASME), 2005)A continuous method is presented for representing the mode interaction that occurs in frequency veering in terms of the nominal sector modes of a cyclic symmetric bladed disk model constrained ... -
Characterization of Turbine Blade Friction Dampers
(The American Society of Mechanical Engineers (ASME), 2005)This paper discusses an approach for characterizing the dynamic behavior of a friction damper. To accomplish this, the deflection of the damper is measured as a function of an applied force ... -
A Novel Cooling Method for Turbine Rotor-Stator Rim Cavities Affected by Mainstream Ingress
(The American Society of Mechanical Engineers (ASME), 2005)A combined experimental and numerical study of interaction between cooling flow and mainstream gas flow in a turbine rotor-stator rim cavity is reported. Particular emphasis is put on the flow ... -
Mechanical Properties of Overaluminized MCrAlY Coatings at Room Temperature
(The American Society of Mechanical Engineers (ASME), 2005)The objective of this study is to compare the mechanical properties of overaluminized MCrAlY coatings sprayed by a vacuum plasma spraying process for the protection against high-temperature ... -
Influence of Fluid Dynamics on Heat Transfer in a Preswirl Rotating-Disk System
(The American Society of Mechanical Engineers (ASME), 2005)Modern gas turbines are cooled using air diverted from the compressor. In a “direct-transfer” preswirl system, this cooling air flows axially across the wheel space from stationary preswirl ... -
Modeling Oil Flows on Seal Runners and Engine Sump Walls
(The American Society of Mechanical Engineers (ASME), 2005)Oil flow behavior within a lubrication system utilized in a turbofan engine has been studied using a two-dimensional model for a seal runner and a sump wall. A two-dimensional, axisymmetric ... -
Life Prediction for Complex Structures
(The American Society of Mechanical Engineers (ASME), 2005)The surface integral method, an indirect boundary element method that represents a crack as a distribution of force dipoles, has been developed to model three-dimensional nonplanar crack growth ... -
Application of Computational Fluid Dynamics Analysis for Rotating Machinery—Part II: Labyrinth Seal Analysis
(The American Society of Mechanical Engineers (ASME), 2005)Labyrinth seals are used in various kinds of turbo machines to reduce internal leakage flow. The working fluid, or the gas passing through the rotor shaft labyrinth seals, often generates ... -
Observations of Flame Behavior in a Laboratory-Scale Premixed Natural Gas/Air Gas Turbine Combustor From Planar Laser Induced Fluorescence Measurements of OH, Laser Doppler Anemometer Velocity Measurements, and Coherent Anti-Stokes Roman Spectrometer Temperature Measurements
(The American Society of Mechanical Engineers (ASME), 2005)Instantaneous planar laser induced fluorescence (PLIF) images of OH, simultaneous axial/radial and axial/tangential velocity measurements with an LDA (laser Doppler anemometer), and instantaneous gas ... -
Active Instability Control: Feedback of Combustion Instabilities on the Injection of Gaseous Fuel
(The American Society of Mechanical Engineers (ASME), 2005)Modern low-emission premix combustion systems are often susceptible to combustion instabilities. Active instability control (AIC) systems are commonly used to attenuate these oscillations. For the ... -
Thermodynamic and Economic Investigation of an Improved Graz Cycle Power Plant for CO2 Capture
(The American Society of Mechanical Engineers (ASME), 2005)Introduction of closed-cycle gas turbines with their capability of retaining combustion generated CO2 can offer a valuable contribution to the Kyoto goal and to future power generation. Therefore, ...