Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5861-5880 of 9564
-
Estimation of Distributed Unbalance of Rotors
(The American Society of Mechanical Engineers (ASME), 2002)Mass unbalance commonly causes vibration of rotor-bearing systems. Lumped mass modeling of unbalance was adapted in most previous research. The lumped unbalance assumption is adequate for thin ... -
Transient Rotordynamic Modeling of Rolling Element Bearing Systems
(The American Society of Mechanical Engineers (ASME), 2002)Nonlinearity effects in rolling element bearings arise from Hertzian contact force deformation relationships, clearance between rolling elements and races, and the bearing-to-housing clearance. ... -
Series of Parallel Arrangement in a Two-Unit Compressor Station
(The American Society of Mechanical Engineers (ASME), 2002)This paper discusses how to determine the arrangement of compressors in a two-unit gas pipeline station where there is no standby unit. The compressors are driven by variable speed drivers ... -
A Comparison of Two Finite Element Reduction Techniques for Mistuned Bladed Disks
(The American Society of Mechanical Engineers (ASME), 2002)The high performance bladed disks used in today’s turbomachines must meet strict standards in terms of aeroelastic stability and resonant response level. One structural characteristic that can ... -
Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part I: Test Facility and Apparatus
(The American Society of Mechanical Engineers (ASME), 2002)An experimental facility and apparatus are described for measuring the dynamic impedance and leakage characteristics of annular gas seals. The apparatus currently has a top speed of 29,800 rpm ... -
Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part II: Smooth and Honeycomb Geometries
(The American Society of Mechanical Engineers (ASME), 2002)Results are presented from tests conducted using an experimental test facility to measure the leakage and dynamic impedance of smooth and honeycomb straight-bore annular gas seals. The test seals ... -
Effects of Wheel-Shaft-Fluid Coupling and Local Wheel Deformations on the Global Behavior of Shaft Lines
(The American Society of Mechanical Engineers (ASME), 2002) -
Using Guided Balls to Auto-Balance Rotors
(The American Society of Mechanical Engineers (ASME), 2002)By using balancing balls constrained to move in a circular groove filled with oil, the vibration of rotating machinery can, under certain circumstances, be reduced. This paper shows that the ... -
Designing Hot Working Processes of Nickel-Based Superalloys Using Finite Element Simulation
(The American Society of Mechanical Engineers (ASME), 2002) -
Development of a Maintenance Program for Major Gas Turbine Hot Gas Path Parts
(The American Society of Mechanical Engineers (ASME), 2002)The thermal efficiency of gas turbine combined cycle power generation plants increase significantly in accordance with turbine inlet temperature. Gas turbine combined cycle power plants operating ... -
A Unique Approach for Thermoeconomic Optimization of an Intercooled, Reheat, and Recuperated Gas Turbine for Cogeneration Applications
(The American Society of Mechanical Engineers (ASME), 2002)In the present paper, a comprehensive methodology for the thermoeconomic performance optimization of an intercooled reheat (ICRH) gas turbine with recuperation for cogenerative applications has ... -
Real-Time On-Line Performance Diagnostics of Heavy-Duty Industrial Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2002)This paper describes the results of real-time, on-line performance monitoring of two gas turbines over a period of five months in 1997. A commercially available software system is installed to ... -
Thermoeconomic Analysis of an Intercooled, Reheat, and Recuperated Gas Turbine for Cogeneration Applications—Part II: Part-Load Operation
(The American Society of Mechanical Engineers (ASME), 2002)The knowledge of off-design performance for a given gas turbine system is critical particularly in applications where considerable operation at low load setting is required. This information ... -
Delamination Cracking in Thermal Barrier Coating System
(The American Society of Mechanical Engineers (ASME), 2002)Delamination cracking in thermal barrier coating (TBC) system is studied with the newly developed theoretical model. A semi-infinite long interface crack is pre-existing. The thermal stress and ... -
Droplet Entrainment From a Shear-Driven Liquid Wall Film in Inclined Ducts: Experimental Study and Correlation Comparison
(The American Society of Mechanical Engineers (ASME), 2002)The primary objective of the present study is to clarify the droplet disintegration mechanism and the film properties of liquid oil films driven by shear stress, which is induced by a co-current ... -
Conformable Eddy-Current Sensors and Arrays for Fleetwide Gas Turbine Component Quality Assessment
(The American Society of Mechanical Engineers (ASME), 2002)The conformable Meandering Winding Magnetometer (MWM® ) eddy current sensors and MWM-arrays provide new inspection capabilities for gas turbine components. The sensors provide measurements of ... -
Gas Turbine Mach Number Control With Simplified Fuel System
(The American Society of Mechanical Engineers (ASME), 2002)The compressor exit Mach number control theory presented here will enable improved control of transient compressor working point trajectories of a turbine engine. This will allow the steady ... -
The Ubiquitous Personal Turbine—A Power Vision for the 21st Century
(The American Society of Mechanical Engineers (ASME), 2002)Having a personal computer (PC) and related electronic equipment in the majority of U.S. homes today is accepted without question. In the same vein, having a personal turbine (PT) in the home ... -
Data Rectification and Detection of Trend Shifts in Jet Engine Path Measurements Using Median Filters and Fuzzy Logic
(The American Society of Mechanical Engineers (ASME), 2002)Filtering methods are explored for removing noise from data while preserving sharp edges that many indicate a trend shift in gas turbine measurements. Linear filters are found to be have ... -
A Multiple Harmonic Open-Loop Controller for Hydro/Aerodynamic Force Measurements in Rotating Machinery Using Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2002)