Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3201-3220 of 9564
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Increasing Flashback Resistance in Lean Premixed Swirl Stabilized Hydrogen Combustion by Axial Air Injection
(The American Society of Mechanical Engineers (ASME), 2015)Since lean premixed combustion allows for fuelefficiency and low emissions, it is nowadays state of the art in stationary gas turbines. In the long term, it is also a promising approach for aero engines, when safety issues ... -
A New Approach to the Gray Box Identification of Wiener Models With the Application of Gas Turbine Engine Modeling
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, a new approach is presented for the graybox identification of Wiener models (WM); and to evaluate the performance of the proposed method, it is used to estimate the dynamic behavior of a twoshaft industrial ... -
Multi objective Optimization of Conceptual Rotorcraft Powerplants: Trade off Between Rotorcraft Fuel Efficiency and Environmental Impact
(The American Society of Mechanical Engineers (ASME), 2015)This paper aims to present an integrated rotorcraft conceptual design and analysis framework, deployed for the multidisciplinary design and optimization of regenerative powerplant configurations in terms of rotorcraft ... -
An Approach for Optimal Measurements Selection on Gas Turbine Engine Fault Diagnosis
(The American Society of Mechanical Engineers (ASME), 2015)Gas path fault diagnosis plays an important role in guaranteeing safe, reliable and costeffective operation for gas turbine engines. Measurements selection is among the most critical issues for diagnostic method implementation. ... -
Numerical Simulations of a Turbulent High Pressure Premixed Cooled Jet Flame With the Flamelet Generated Manifolds Technique
(The American Society of Mechanical Engineers (ASME), 2015)In the present paper, a computational analysis of a high pressure confined premixed turbulent methane/air jet flames with heat loss to the walls is presented. In this scope, chemistry is reduced by the use of the flamelet ... -
Nonlinear Dynamics of a Simplified Model of an Overhung Rotor Subjected to Intermittent Annular Rubs
(The American Society of Mechanical Engineers (ASME), 2015)The dynamic forced response of a twodegreesoffreedom model of an unbalanced overhung rotor with clearance and symmetric piecewiselinear stiffness is examined in the time domain. The stiffness nonlinearity is representative ... -
Thermofluid Dynamic Analysis of a Gas Turbine Transition Piece
(The American Society of Mechanical Engineers (ASME), 2015)The transitionpiece of a gas turbine engine is subjected to high thermal loads as it collects high temperature combustion products from the gas generator to a turbine. This generally produces high thermal stress levels in ... -
Impact of Cooling Injection on the Transonic Over Tip Leakage Flow and Squealer Aerothermal Design Optimization
(The American Society of Mechanical Engineers (ASME), 2015)In the present work, the effect of coolant injection on the overtipleakage (OTL) flow and squealer designs has been investigated in a transonic flow regime. After an experimental verification of the computational tool ... -
Model Validation for Identification of Damage Dynamics
(The American Society of Mechanical Engineers (ASME), 2015)Robust control techniques have allowed engineers to create more descriptive models by including uncertainty in the form of additive noise and plant perturbations. As a result, the complete model set is robust to any ... -
Rotor Blade Heat Transfer of High Pressure Turbine Stage Under Inlet Hot Streak and Swirl
(The American Society of Mechanical Engineers (ASME), 2015)A key consideration in high pressure (HP) turbine designs is the heat load experienced by rotor blades. Impact of turbine inlet nonuniformity of combined temperature and velocity traverses, typical for a leanburn combustor ... -
Application of Possibilistic C Means for Fault Detection in Nuclear Power Plant Data
(The American Society of Mechanical Engineers (ASME), 2015)This paper describes a classification method for automatic fault detection in nuclear power plant (NPP) data. The method takes as input time series associated to specific parameters and realizes signal classification by ... -
Experiments on an Axial Fan Stage: Time Resolved Analysis of Rotating Instability Modes
(The American Society of Mechanical Engineers (ASME), 2015)Rotating instability (RI) occurs at offdesign conditions in axial compressors, predominantly in rotor configurations with large tip clearances. Characteristic spectral signatures with sidebyside peaks below the blade passing ... -
Pressure Activated Leaf Seal Technology Readiness Testing
(The American Society of Mechanical Engineers (ASME), 2015)This paper continues the evaluation of pressure actuated leaf seals (PALSs) technology readiness for shaft and shroud sealing in power generation and aerospace applications. Seal designs tested are prototypical and constructed ... -
Dynamic Response of a Metal and a CMC Turbine Blade During a Controlled Rub Event Using a Segmented Shroud
(The American Society of Mechanical Engineers (ASME), 2015)Ceramic matrix composites (CMCs) provide several benefits over metal blades including weight and increased temperature capability, and have the potential for increased engine performance by reduction of the cooling flow ... -
Starting Characteristic Analysis of a Radial Inflow Turbine for the Regenerative Brayton Cycle
(The American Society of Mechanical Engineers (ASME), 2015)Microturbines have been developed as compact gas turbines to be applied in the regenerative Brayton cycle. A typical microturbine is composed of a centrifugal compressor and a radial inflow turbine. As such, the microturbine ... -
Model Analysis of Syngas Combustion and Emissions for a Micro Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2015)The purpose of this study is to investigate the combustion and emission characteristics of syngas fuels applied in a micro gas turbine, which is originally designed for a natural gas fired engine. The computation results ... -
Mistuned Response Prediction of Dual Flow Path Integrally Bladed Rotors With Geometric Mistuning
(The American Society of Mechanical Engineers (ASME), 2015)The geometric mistuning problem is investigated for dual flowpath integrally bladed rotors (DFIBRs) by outlining two methods that explicitly account for blade geometry surface deviations. The methods result in reducedorder ... -
Dynamic Analysis of Active Magnetic Bearing Rotor Dropping on Auto eliminating Clearance Auxiliary Bearing Devices
(The American Society of Mechanical Engineers (ASME), 2015)Autoeliminating clearance auxiliary bearing devices (ACABD) can automatically eliminate the protective clearance between the ball bearing's outer race and the ACABD's supports, thus recenter the rotor when active magnetic ... -
Modeling Investigation of Different Methods to Suppress Engine Knock on a Small Spark Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2015)Knock is the main obstacle toward increasing the compression ratio and using lower octane number fuels. In this paper, a small twovalve aircraft spark ignition engine, Rotax914, was used as an example to investigate different ... -
Analysis of Azimuthal Thermo acoustic Modes in Annular Gas Turbine Combustion Chambers
(The American Society of Mechanical Engineers (ASME), 2015)Modern gas turbine combustors operating in leanpremixed mode are prone to thermoacoustic instabilities. In annular combustion chambers, usually azimuthal acoustic modes are the critical ones interacting with the flame. In ...