Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5461-5480 of 9564
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Strain-Life Assessment of Grainex Mar-M 247 for NASA’s Turbine Seal Test Facility
(The American Society of Mechanical Engineers (ASME), 2005)NASA’s turbine seal facility tests air-to-air seals for advanced jet engines. High temperature, speed, and pressure combinations limit test disk life, due to crack initiation in the Grainex Mar-M ... -
Blade Manufacturing Tolerances Definition for a Mistuned Industrial Bladed Disk
(The American Society of Mechanical Engineers (ASME), 2005)This paper deals with the characterization of the blade manufacturing geometric tolerances in order to get a given level of amplification in the forced response of a mistuned bladed-disk. The ... -
Optimal Operational Planning of Cogeneration Systems With Microturbine and Desiccant Air Conditioning Units
(The American Society of Mechanical Engineers (ASME), 2005)Economic and energy-saving characteristics of cogeneration systems with microturbine and desiccant air-conditioning units are investigated on system operational planning. An optimization approach is ... -
Experiment on Gas Ingestion Through Axial-Flow Turbine Rim Seals
(The American Society of Mechanical Engineers (ASME), 2005)It has been suggested by researchers that ingestion, through rim seals, of mainstream gas into axial-flow turbine disk cavities is a consequence of the prevailing unsteady three-dimensional flow ... -
Modeling and Validation of the Thermal Effects on Gas Turbine Transients
(The American Society of Mechanical Engineers (ASME), 2005)Secondary effects, such as heat transfer from fluid to engine structure and the resulting changes in tip and seal clearances affect component performance and stability. A tip clearance model ... -
Numerical Simulation of Three-Dimensional Bristle Bending in Brush Seals
(The American Society of Mechanical Engineers (ASME), 2005)This paper presents a new method for predicting the three-dimensional (3D) bending behavior of bristles in brush seals. The model builds on and addresses shortcomings in an earlier two-dimensional ... -
A Feasibility Study of Inverted Brayton Cycle for Gas Turbine Repowering
(The American Society of Mechanical Engineers (ASME), 2005)In the paper a feasibility study of inverted Brayton cycle (IBC) engines, for the repowering of existing gas turbines, is presented. The following main phases have been carried out: (i) ... -
H2∕O2 Cycles: Thermodynamic Potentialities and Limits
(The American Society of Mechanical Engineers (ASME), 2005)In this paper, the thermodynamic potentialities and limits of the H2∕O2 turbine cycles (afterward named only H2∕O2 cycles) are investigated. Starting from the conventional gas turbine and steam ... -
Models for the Prediction of Transients in Closed Regenerative Gas Turbine Cycles With Centrifugal Impellers
(The American Society of Mechanical Engineers (ASME), 2005)This paper presents transient-flow component models for the prediction of the transient response of gas turbine cycles. The application is to predict the transient response of a small solar-powered ... -
Preliminary Study of a Novel R718 Compression Refrigeration Cycle Using a Three-Port Condensing Wave Rotor
(The American Society of Mechanical Engineers (ASME), 2005)Using a novel 3-port condensing wave rotor enhancing the turbocompression in a R718 refrigeration cycle, which uses only water as a refrigerant, has been introduced. The wave-rotor implementation ... -
Adapting the Micro-Gas Turbine Operation to Variable Thermal and Electrical Requirements
(The American Society of Mechanical Engineers (ASME), 2005)This paper examines the possibilities for a micro-gas turbine operation under a wide range of thermal and mechanical load requirements. The authors focus the attention on a partially recuperated ... -
Analysis of Gas-Steam Combined Cycles With Natural Gas Reforming and CO2 Capture
(The American Society of Mechanical Engineers (ASME), 2005)In the last several years greenhouse gas emissions, and, in particular, carbon dioxide emissions, have become a major concern in the power generation industry and a large amount of research ... -
Turbocharger-Design Effects on Gasoline-Engine Performance
(The American Society of Mechanical Engineers (ASME), 2005)Specification of a turbocharger for a given engine involves matching the turbocharger performance characteristics with those of the piston engine. Theoretical considerations of matching turbocharger ... -
Laser-Based Investigations of Periodic Combustion Instabilities in a Gas Turbine Model Combustor
(The American Society of Mechanical Engineers (ASME), 2005)The driving mechanism of pulsations in gas turbine combustors depends on a complex interaction between flow field, chemistry, heat release, and acoustics. Experimental data on all these factors ... -
Economic and Scenario Analyses of New Gas Turbine Combined Cycles With No Emissions of Carbon Dioxide
(The American Society of Mechanical Engineers (ASME), 2005)In this paper economic and scenario analyses of new gas turbine combined cycles with no emissions of carbon dioxide (CO2) and nitrogen oxides are described. The cycles, already presented in a ... -
Evaluation of an Enhanced Bank of Kalman Filters for In-Flight Aircraft Engine Sensor Fault Diagnostics
(The American Society of Mechanical Engineers (ASME), 2005)In this paper, an approach for in-flight fault detection and isolation (FDI) of aircraft engine sensors based on a bank of Kalman filters is developed. This approach utilizes multiple Kalman ... -
Time-Resolved Temperature Profiling of Flames With Highly Preheated/Low Oxygen Concentration Air in an Industrial Size Furnace
(The American Society of Mechanical Engineers (ASME), 2005)A high-speed video camera was combined with a newly developed optical system to measure time resolved two-dimensional (2D) temperature distribution in flames. This diagnostics has been applied ... -
Online Combustor Stability Margin Assessment Using Dynamic Pressure Data
(The American Society of Mechanical Engineers (ASME), 2005)This paper describes a strategy for determining a combustor’s dynamic stability margin. Currently, when turbines are being commissioned or simply going through day to day operation, the operator ... -
A Critical Evaluation of NOx Modeling in a Model Combustor
(The American Society of Mechanical Engineers (ASME), 2005)Reliable NOx modeling depends on the accurate prediction of both velocity and temperature fields. The velocity and temperature fields of a propane diffusion flame combustor, with interior and ... -
An Analysis of Turbocharged Diesel Engine Dynamic Response Improvement by Electric Assisting Systems
(The American Society of Mechanical Engineers (ASME), 2005)It is well known that turbocharged diesel engines suffer from an inadequate response to sudden load increase, this being a consequence of the nature of the energy exchange between the engine ...