Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 5101-5120 of 9564
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Editorial
(The American Society of Mechanical Engineers (ASME), 2007)Let me begin by wishing all of you a very happy and prosperous new year. I am proud to have been appointed editor of this journal, and I wish to take this opportunity to share with you ... -
On-Line Measurements of Engine Oil Aeration by X-Ray Absorption
(The American Society of Mechanical Engineers (ASME), 2007)The oil aeration in a V-6 spark-ignition passenger car engine under motoring condition was measured by the X-ray absorption method in the speed range of 2000–6000 rpm. Measurements were made ... -
Supplementary Backward Equations T(p,h), v(p,h), and T(p,s), v(p,s) for the Critical and Supercritical Regions (Region 3) of the Industrial Formulation IAPWS-IF97 for Water and Steam
(The American Society of Mechanical Engineers (ASME), 2007)In modeling advanced steam power cycles, thermodynamic properties as functions of pressure and enthalpy (p,h) or pressure and entropy (p,s) are required in the critical and supercritical regions ... -
Development of a Semi-implicit Solver for Detailed Chemistry in Internal Combustion Engine Simulations
(The American Society of Mechanical Engineers (ASME), 2007)An efficient semi-implicit numerical method is developed for solving the detailed chemical kinetic source terms in internal combustion (IC) engine simulations. The detailed chemistry system forms ... -
Modeling Diesel Spray Flame Liftoff, Sooting Tendency, and NOx Emissions Using Detailed Chemistry With Phenomenological Soot Model
(The American Society of Mechanical Engineers (ASME), 2007)A detailed chemistry-based CFD model was developed to simulate the diesel spray combustion and emission process. A reaction mechanism of n-heptane is coupled with a reduced NOx mechanism to ... -
A Study of the Effects of Inlet Preswirl on the Dynamic Coefficients of a Straight-Bore Honeycomb Gas Damper Seal
(The American Society of Mechanical Engineers (ASME), 2007)Honeycomb seals are frequently used as replacements for labyrinth seals in high-pressure centrifugal compressors to enhance rotordynamic stability. A concern exists that this enhanced stability ... -
Comparisons of Diesel PCCI Combustion Simulations Using a Representative Interactive Flamelet Model and Direct Integration of CFD With Detailed Chemistry
(The American Society of Mechanical Engineers (ASME), 2007)Diesel engine simulation results using two different combustion models are presented in this study, namely the representative interactive flamelet (RIF) model and the direct integration of ... -
Field Methods for Identification of Bearng Support Parameters—Part I: Identification From Transient Rotor Dynamic Response due to Impacts
(The American Society of Mechanical Engineers (ASME), 2007)A simple procedure, with the potential as a field resource, for identification of a bearing support parameter from recorded transient rotor responses due to impact loads follows. The method is ... -
Application of Controllable Electric Coolant Pump for Fuel Economy and Cooling Performance Improvement
(The American Society of Mechanical Engineers (ASME), 2007)The engine cooling system for a typical class 3 pickup truck with a medium duty diesel engine was modeled with a commercial code, GT-Cool, in order to explore the benefit of a controllable ... -
Effects of Multi-Injection Mode on Diesel Homogeneous Charge Compression Ignition Combustion
(The American Society of Mechanical Engineers (ASME), 2007)Early injection, well before top dead center (TDC), has perhaps been the most commonly investigated approach to obtain homogeneous charge compression ignition (HCCI) combustion in a direct-injection ... -
Field Methods for Identification of Bearing Support Parameters—Part II: Identification From Rotor Dynamic Response due to Imbalances
(The American Society of Mechanical Engineers (ASME), 2007)This paper describes a procedure suitable for field implementation that allows identification of synchronous bearing support parameters (force coefficients) from recorded rotor responses to imbalance. ... -
A Bulk-Flow Model of Angled Injection Lomakin Bearings
(The American Society of Mechanical Engineers (ASME), 2007)This paper introduces a bulk-flow model for prediction of the static and dynamic force coefficients of angled injection Lomakin bearings. The analysis accounts for the flow interaction between ... -
CO2 Sequestration From IGCC Power Plants by Means of Metallic Membranes
(The American Society of Mechanical Engineers (ASME), 2007)This paper investigates novel IGCC plants that employ hydrogen separation membranes in order to capture carbon dioxide for long-term storage. The thermodynamic performance of these membrane-based ... -
A Bulk Flow Model for Off-Centered Honeycomb Gas Seals
(The American Society of Mechanical Engineers (ASME), 2007)A computational analysis for prediction of the static and dynamic forced performance of gas honeycomb seals at off-centered rotor conditions follows. The bulk-flow analysis, similar to the ... -
High-Pressure Turbine Deposition in Land-Based Gas Turbines From Various Synfuels
(The American Society of Mechanical Engineers (ASME), 2007)Ash deposits from four candidate power turbine synfuels were studied in an accelerated deposition test facility. The facility matches the gas temperature and velocity of modern first-stage ... -
Effects of Bearing Stiffness Anisotropy on Hydrostatic Micro Gas Journal Bearing Dynamic Behavior
(The American Society of Mechanical Engineers (ASME), 2007)The high-speed microhydrostatic gas journal bearings used in the high-power density MIT microengines are of very low aspect ratio with an L∕D of less than 0.1 and are running at surface speeds ... -
Operation of a Mesoscopic Gas Turbine Simulator at Speeds in Excess of 700,000rpm on Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2007)A small mesoscopic gas turbine engine (MGTE) simulator was tested at speeds over 700,000rpm. The MGTE was operated with specially designed miniature compliant foil journal and thrust air bearings. ... -
Some Experiments on Oil Whirl and Oil Whip
(The American Society of Mechanical Engineers (ASME), 2007)The oil whirl and oil whip phenomena have been well known since the early twentieth century. However, there is a lot of confusion on the parameters that affect the onset of instability. In ... -
Advancements in the Structural Stiffness and Damping of a Large Compliant Foil Journal Bearing: An Experimental Study
(The American Society of Mechanical Engineers (ASME), 2007)This paper presents the results of an experimental investigation into the dynamic structural stiffness and damping characteristics of a 21.6‐cm(8.5in.)-diameter compliant surface foil journal bearing. ... -
Development of an Improved High Cycle Fatigue Criterion
(The American Society of Mechanical Engineers (ASME), 2007)An integrated computational-experimental approach for prediction of total fatigue life applied to a uniaxial stress state is developed. The approach consists of the following elements: (1) development ...