Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5021-5040 of 9564
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Interlaminar Crack Growth Resistances of Various Ceramic Matrix Composites in Mode I and Mode II Loading
(The American Society of Mechanical Engineers (ASME), 2008)Interlaminar crack growth resistances were evaluated for five different SiC fiber-reinforced ceramic matrix composites (CMCs) including three gas-turbine grade melt-infiltrated SiC∕SiC composites. ... -
Development of a Highly Reduced Mechanism for Iso-Octane HCCI Combustion With Targeted Search Algorithm
(The American Society of Mechanical Engineers (ASME), 2008)This paper describes recent development of iso-octane skeletal and reduced mechanisms for speeding up numerical simulations of homogeneous charge compression ignition (HCCI) engines. A novel targeted ... -
Laboratory Study of Premixed H2-Air and H2–N2-Air Flames in a Low-Swirl Injector for Ultralow Emissions Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2008)The objective of this study is to conduct laboratory experiments on low-swirl injectors (LSIs) to obtain the basic information for adapting LSI to burn H2 and diluted H2 fuels that will be ... -
Creep-Fatigue Tests on Full Scale Directionally Solidified Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2008)A new experimental method, in which a full scale directionally solidified (DS) alloy turbine blade is loaded by a special design rig employing friction force and heated by eddy current induction, ... -
Characteristic Response of a Production Diesel Oxidation Catalyst Exposed to Lean and Rich PCI Exhaust
(The American Society of Mechanical Engineers (ASME), 2008)Although low-temperature premixed compression ignition (PCI) combustion in a light-duty diesel engine offers dramatic and simultaneous reductions in nitric oxides (NOx) and soot, associated increases ... -
Fuel Injection Scheme for a Compact Afterburner Without Flameholders
(The American Society of Mechanical Engineers (ASME), 2008)State-of-the-art afterburners employ spray bars and flameholders to burn the fuel. Such afterburner designs significantly increase the length (and thus weight), pressure losses, and observability ... -
Off-Design Performance Investigation of a Low Calorific Value Gas Fired Generic-Type Single-Shaft Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2008)When low calorific value gases are fired, the performance and stability of gas turbines may deteriorate due to a large amount of inertballast and changes in working fluid properties. Since it ... -
Active Air Control System Development Using Charge Air Integrated Manifold Engine Numerical Simulation (CAIMENS)
(The American Society of Mechanical Engineers (ASME), 2008)This paper reports on an investigation into the transient, compressible flow physics that impact the trapped equivalence ratio. A comprehensive, variable geometry, multicylinder turbocharger-reciprocating ... -
Testing of a Small Turbocharger/Turbojet Sized Simulator Rotor Supported on Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2008)A small rotor designed to simulate a miniature turbojet engine or turbocharger rotor mounted on compliant foil bearings was tested at speeds in excess of 150,000rpm and temperatures above ... -
Effect of Misalignment on the Characteristics of Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2008)Due to the renewed interest in the effect of misalignment on the dynamic characteristics of journal bearings, this paper presents a study of the effect of misalignment on the dynamic characteristics ... -
The Fuel Mix Limits and Efficiency of a Stoichiometric, Ammonia, and Gasoline Dual Fueled Spark Ignition Engine
(The American Society of Mechanical Engineers (ASME), 2008)An overall stoichiometric mixture of air, gaseous ammonia, and gasoline was metered into a single cylinder, variable compression ratio, supercharged cooperative fuel research (CFR) engine at varying ... -
Flexure Pivot Tilting Pad Hybrid Gas Bearings: Operation With Worn Clearances and Two Load-Pad Configurations
(The American Society of Mechanical Engineers (ASME), 2008)Gas film bearings enable the successful deployment of high-speed microturbomachinery. Foil bearings are in use; however, cost and lack of calibrated predictive tools prevent their widespread ... -
The Impact of Real Gas Properties on Predictions of Static and Rotordynamic Properties of the Annular Gas Seals for Injection Compressors
(The American Society of Mechanical Engineers (ASME), 2008)Predictions are presented for an annular gas seal that is representative of the division-wall seal of a back-to-back compressor or the balance-piston seal of an in-line compressor. A two-control-volume ... -
Model Calibration of Anisotropic Rotordynamic Systems With Speed-Dependent Parameters
(The American Society of Mechanical Engineers (ASME), 2008)In this paper, a method for calibrating rotordynamic models of speed-dependent systems with anisotropic support is presented. The method is based on the comparison between the calculated eigenvalues ... -
Experimental and Numerical Investigation of Rotating Bladed Disk Forced Response Using Underplatform Friction Dampers
(The American Society of Mechanical Engineers (ASME), 2008)In this paper, we present a methodology and results from an experimental investigation of forced vibration response for a bladed disk with fitted underplatform “cottage-roof” friction dampers, ... -
Method and Detailed Analysis of Individual Hydrocarbon Species From Diesel Combustion Modes and Diesel Oxidation Catalyst
(The American Society of Mechanical Engineers (ASME), 2008)An undiluted exhaust hydrocarbon (HC) speciation method, using flame ionization detector gas chromatographs, is developed to investigate HC species from conventional and low-temperature premixed ... -
Probabilistic Engine Performance Scatter and Deterioration Modeling
(The American Society of Mechanical Engineers (ASME), 2008)The change of performance parameters over time due to engine deterioration and production scatter plays an important role to ensure safe and economical engine operation. A tool has been developed ... -
An Experimental Study of Spark Anemometry for In-Cylinder Velocity Measurements
(The American Society of Mechanical Engineers (ASME), 2008)It has been demonstrated by previous researchers that an approximate value of the bulk flow velocity through the spark plug gap of a running spark ignition engine may be deduced from the ... -
Squeeze Film Damper With a Mechanical End Seal: Experimental Force Coefficients Derived From Circular Centered Orbits
(The American Society of Mechanical Engineers (ASME), 2008)The paper presents parameter identification measurements conducted on a squeeze film damper (SFD) featuring a nonrotating mechanical seal that effectively eliminates lubricant side leakage. The ... -
Combustion Chamber Steam Injection for Gas Turbine Performance Improvement During High Ambient Temperature Operations
(The American Society of Mechanical Engineers (ASME), 2008)The gas turbines are generally used for large scale power generation. The basic gas turbine cycle has low thermal efficiency, which decreases in the hard climatic conditions of operation, so ...