Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5641-5660 of 9564
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Dwell Sensitive Fatigue Response of Titanium Alloys for Power Plant Applications
(The American Society of Mechanical Engineers (ASME), 2003)The phenomenon of “dwell sensitivity” in the α+β and near α titanium alloys and the intrinsic relationship with quasi-cleavage facet formation is discussed. In the present paper, particular ... -
Application of Pulse Detonation Combustion to Turbofan Engines
(The American Society of Mechanical Engineers (ASME), 2003)The potential performance gain of utilizing pulse detonation combustion in the bypass duct of a turbofan engine for possible elimination of the traditional afterburner was investigated in this ... -
Predicted Effects of Shunt Injection on the Rotordynamics of Gas Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2003)A recent CFD perturbation model for turbomachinery seal rotordynamics was extended for labyrinth shunt injection with an arbitrarily high pressure gas. A large number of measured cases with ... -
Effects of Multistage Coupling and Disk Flexibility on Mistuned Bladed Disk Dynamics
(The American Society of Mechanical Engineers (ASME), 2003)The effects of disk flexibility and multistage coupling on the dynamics of bladed disks with and without blade mistuning are investigated. Both free and forced responses are examined using ... -
Technical Risks and Mitigation Measures in Combustion Turbine Project Development
(The American Society of Mechanical Engineers (ASME), 2003)Project developers, insurers, financiers, and maintenance organizations have an interest in quantifying technical risks and evaluating risk mitigation alternatives for combustion turbine (CT) power ... -
Optimization of Intentional Mistuning Patterns for the Reduction of the Forced Response Effects of Unintentional Mistuning: Formulation and Assessment
(The American Society of Mechanical Engineers (ASME), 2003)The focus of the present investigation is on the use of intentional mistuning of bladed disks to reduce their sensitivity to unintentional random mistuning. The class of intentionally mistuned ... -
Identification of the Modal Parameters of a Flexibly Supported Rigid Casing
(The American Society of Mechanical Engineers (ASME), 2003)Satisfactory means for evaluating the vibration behavior of gas turbine installations where it is impractical to obtain a satisfactory model of the support structure and where it has natural ... -
Experimental Study of Aerodynamic and Structural Damping in a Full-Scale Rotating Turbine
(The American Society of Mechanical Engineers (ASME), 2003)Damping in turbomachinery blades has been an important parameter in the study of forced response and high-cycle fatigue, but because of its complexity the sources and physical nature of damping ... -
Predicted Geometry Effects on Oil Vapor Flow Through Buffer-Gas Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2003)Mass transport characteristics of buffer-gas labyrinth seals operating in the flooded, nonmist regime were studied using numerical simulations. Discussion is given of the extension, to account for ... -
Model Identification of a Rotor With Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2003)The experimental identification of a long flexible rotor with three magnetic bearing journals is presented. Frequency response functions are measured between the magnetic bearing journals and the ... -
Design Study of Part-Flow Evaporative Gas Turbine Cycles: Performance and Equipment Sizing—Part I: Aeroderivative Core
(The American Society of Mechanical Engineers (ASME), 2003)The evaporative gas turbine cycle is a new high-efficiency power cycle that has reached the pilot testing stage. This paper presents calculation results of a new humidification strategy based ... -
Forced Response of Turbine Engine Bladed Disks and Sensitivity to Harmonic Mistuning
(The American Society of Mechanical Engineers (ASME), 2003)The mistuned forced response of turbine engine bladed disks is treated using harmonic perturbations in the properties of a continuous ring. A continuous shear spring is attached to the ring ... -
Chebyshev Polynomials Fits for Efficient Analysis of Finite Length Squeeze Film Damped Rotors
(The American Society of Mechanical Engineers (ASME), 2003)The nonlinear behavior of the hydrodynamic forces generated by squeeze film dampers makes dynamical analyses of rotor-bearing systems incorporating such devices a complex and often long task. ... -
Development of High-Speed Gas Bearings for High-Power Density Microdevices
(The American Society of Mechanical Engineers (ASME), 2003)A 4.2-mm diameter silicon rotor has been operated in a controlled and sustained manner at rotational speeds greater than 1.3 million rpm and power levels approaching 5 W. The rotor, supported ... -
Dynamic Modeling and Validation of a Lorentz, Self-Bearing Motor Test Rig
(The American Society of Mechanical Engineers (ASME), 2003)A new type of self-bearing motor that uses Lorentz-type forces to generate both bearing force and motoring torque has been developed. The motor stator is of slotless construction with four ... -
Design Study of Part-Flow Evaporative Gas Turbine Cycles: Performance and Equipment Sizing—Part II: Industrial Core
(The American Society of Mechanical Engineers (ASME), 2003)This is Part II of a two-part paper and presents calculation results of a part-flow EvGT cycle based on gas turbine data for the ABB GTX100 (modified for intercooling). The evaporative gas ... -
Internal Reforming Solid Oxide Fuel Cell Gas Turbine Combined Cycles (IRSOFC-GT)—Part II: Exergy and Thermoeconomic Analyses
(The American Society of Mechanical Engineers (ASME), 2003)The aim of this work is to investigate the performance of internal reforming solid oxide fuel cell (IRSOFC) and gas turbine (GT) combined cycles. A mathematical model of the IRSOFC steady-state ... -
Combustion Test Results of an Uncooled Combustor With Ceramic Matrix Composite Liner
(The American Society of Mechanical Engineers (ASME), 2003)A reverse-flow annular combustor with its casing diameter of 400 mm was developed using an uncooled liner made of a three-dimensional woven ceramic matrix composite. The combustor was tested ... -
Control System Design for Active Lubrication With Theoretical and Experimental Examples
(The American Society of Mechanical Engineers (ASME), 2003)This work focuses on the theoretical and experimental behavior of rigid rotors controlled by tilting-pad journal bearings with active oil injection. Initially the mathematical model of the active ... -
A Harmonic Wavelets Approach for Extracting Transient Patterns From Measured Rotor Vibration Data
(The American Society of Mechanical Engineers (ASME), 2003)Vibration analysis is a powerful diagnostic tool for rotating machinery problems. Traditional approaches to vibration signature analysis have focused on the Fourier transform, which tends to average ...