Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 6261-6280 of 9564
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Aerodynamically Induced Radial Forces in a Centrifugal Gas Compressor: Part 2—Computational Investigation
(The American Society of Mechanical Engineers (ASME), 1999)Radial loads and direction of a centrifugal gas compressor containing a high specific speed mixed flow impeller and a single tongue volute were determined both experimentally and computationally ... -
Computational Evaluation of Low NOx Operating Conditions in Arch-Fired Boilers
(The American Society of Mechanical Engineers (ASME), 1999)In the present paper, a computational model is used to simulate the aero-dynamic, thermal, and chemical conditions inside an arch-fired coal boiler. The model is based on the Eulerian-Eulerian ... -
A Parametric Starting Study of an Axial-Centrifugal Gas Turbine Engine Using a One-Dimensional Dynamic Engine Model and Comparisons to Experimental Results: Part I—Model Development and Facility Description
(The American Society of Mechanical Engineers (ASME), 1999)A generic one-dimensional gas turbine engine model, development at the Arnold Engineering Development Center, has been configured to represent the gas generator of a General Electric axial-centrifugal ... -
Combined Biomass and Black Liquor Gasifier/Gas Turbine Cogeneration at Pulp and Paper Mills
(The American Society of Mechanical Engineers (ASME), 1999)Kraft pulp and paper mills generate large quantities of black liquor and byproduct biomass suitable for gasification. These fuels are used today for onsite cogeneration of heat and power in ... -
Analysis of Heat, Mass, and Momentum Transfer in the Rain Zone of Counterflow Cooling Towers
(The American Society of Mechanical Engineers (ASME), 1999)The rate of heat, mass, and momentum transfer in the rain zone of three counterflow cooling tower geometries is analyzed using simplifying assumptions and numerical integration. The objective ... -
The Creep Damage Behavior of the Plasma-Sprayed Thermal Barrier Coating System NiCr22Co12Mo9-NiCoCrAlY-ZrO2/7%Y2O3
(The American Society of Mechanical Engineers (ASME), 1999)During creep loading metallic substrates impose deformation on deposited ceramic thermal barrier coatings (TBC). Strain accomodation of the TBC is not attained by plastic deformation, but by means ... -
Reduction of the Dynamic Load Capacity in a Squeeze Film Damper Operating With a Bubbly Lubricant
(The American Society of Mechanical Engineers (ASME), 1999)Squeeze film dampers (SFDs) are effective means to reduce vibrations and to suppress instabilities in rotor-bearing systems. However, at operating conditions while traversing critical speeds with ... -
A Metallographic Technique for High Temperature Creep Damage Assessment in Single Crystal Alloys
(The American Society of Mechanical Engineers (ASME), 1999)The use of single crystal (SX) nickel-base superalloys will increase in the future with the introduction of SX blades into large gas turbines for base-load electricity production. Prolonged ... -
Experimentally Determined Rotor Power Losses in Homopolar and Heteropolar Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 1999)The identification of parameters that dictate the magnitude of rotor power losses in radial magnetic bearings is very important for many applications. Low loss performance of magnetic bearings ... -
Statistics of Response of a Mistuned Bladed Disk Assembly Subjected to White Noise and Narrow Band Excitation
(The American Society of Mechanical Engineers (ASME), 1999)This paper deals with the statistics of the response of a mistuned bladed disk assembly subjected to random excitation. Analytical techniques are developed to compute this statistics for two ... -
Influence of an Aluminide Coating on the TMF Life of a Single Crystal Nickel-Base Superalloy
(The American Society of Mechanical Engineers (ASME), 1999)TMF tests were conducted with bare and aluminide coated single crystal nickel-based superalloy specimens. Temperature cycling was between 400°C and 1100°C with a phase shift (135 deg) ... -
Rotor Power Losses in Planar Radial Magnetic Bearings—Effects of Number of Stator Poles, Air Gap Thickness, and Magnetic Flux Density
(The American Society of Mechanical Engineers (ASME), 1999)Rotor Power losses in magnetic bearings cannot be accurately calculated at this time because of the complexity of the magnetic field distribution and several other effects. The losses are due ... -
CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles: Part A—With Oxygen-Blown Combustion
(The American Society of Mechanical Engineers (ASME), 1999)This paper analyzes the fundamentals of IGCC power plants where carbon dioxide produced by syngas combustion can be removed, liquefied and eventually disposed, to limit the environmental problems ... -
An Iterative CFD and Mechanical Brush Seal Model and Comparison With Experimental Results
(The American Society of Mechanical Engineers (ASME), 1999)The position of the bristles within a brush seal is dictated by the pressure distribution within the seal, which is itself influenced by the position of the bristle matrix. In order to predict ... -
Characteristics of Discharge Coefficient in a Rotating Disk System
(The American Society of Mechanical Engineers (ASME), 1999)The discharge coefficient of a long orifice in a rotating system is measured to examine the rotational effect on discharge behavior. The rotating system is comprised of a rotating disk and ... -
CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles: Part B—With Air-Blown Combustion and CO2 Physical Absorption
(The American Society of Mechanical Engineers (ASME), 1999)This paper analyzes the fundamentals of IGCC power plants with carbon dioxide removal systems, by a cycle configuration alternative to the one discussed in Part A (with oxygen-blown combustion). ... -
Nonlinear Model Predictive Control of a Laboratory Gas Turbine Installation
(The American Society of Mechanical Engineers (ASME), 1999)The feasibility of model predictive control (MPC) applied to a laboratory gas turbine installation is investigated. MPC explicitly incorporates (input and output) constraints in its optimizations, ... -
Off-Design Performance of Various Gas-Turbine Cycle and Shaft Configurations
(The American Society of Mechanical Engineers (ASME), 1999)The design-point performance of various gas turbine cycles such as simple, regenerative, and intercooled-regenerative, is well understood. It is also understood that more elaborate shaft arrangements ... -
High Temperature Silicon Integrated Circuits and Passive Components for Commercial and Military Applications
(The American Society of Mechanical Engineers (ASME), 1999)Advances in silicon-on-insulator (SOI) integrated circuit technology and the steady development of wider band gap semiconductors like silicon carbide are enabling the practical deployment of high ... -
Correlations of the Convection Heat Transfer in Annular Channels With Rotating Inner Cylinder
(The American Society of Mechanical Engineers (ASME), 1999)In the internal air system of gas turbine engines or generators, a large variety of different types of annular channels with rotating cylinders are found. Even though the geometry is very ...