Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 6301-6320 of 9564
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The Effect of Squeeze Film Damper Parameters on the Unbalance Response and Stability of a Flexible Rotor
(The American Society of Mechanical Engineers (ASME), 1998)There has been much research work carried out on various aspects of individual squeeze-film dampers (SFDs) but very little on the interplay between a damper and the rotating assembly of which ... -
Creep Life of Ceramic Components Using a Finite-Element-Based Integrated Design Program (CARES/CREEP)
(The American Society of Mechanical Engineers (ASME), 1998)The desirable properties of ceramics at high temperatures have generated interest in their use for structural applications such as in advanced turbine systems. Design lives for such systems can ... -
SNECMA Experience With Cost-Effective DS Airfoil Technology Applied Using CM 186 LC® Alloy
(The American Society of Mechanical Engineers (ASME), 1998)From a cost point of view SNECMA has found DS columnar grain manufacturing technology to be highly attractive compared to single crystal. CM 186 LC alloy exhibits enhanced mechanical and ... -
Friction Damping of Hollow Airfoils: Part I—Theoretical Development
(The American Society of Mechanical Engineers (ASME), 1998)The quest for higher performance engines in conjunction with the requirement for lower life cycle costs has resulted in stage configurations that are more susceptible to high cycle fatigue. One ... -
High-Speed Rotor Losses in a Radial Eight-Pole Magnetic Bearing: Part 1—Experimental Measurement
(The American Society of Mechanical Engineers (ASME), 1998)The continual increase in the use of magnetic bearings in various capacities, including high-speed aerospace applications such as jet engine prototypes, dictates the need to quantify power losses ... -
Friction Damping of Hollow Airfoils: Part II—Experimental Verification
(The American Society of Mechanical Engineers (ASME), 1998)The use of hollow airfoils in turbomachinery applications, in particular fans and turbines, is an essential element in reducing the overall engine weight. However, state-of-the-art airfoil geometries ... -
The Maximum Factor by Which Forced Vibration of Blades Can Increase Due to Mistuning
(The American Society of Mechanical Engineers (ASME), 1998)In 1966 it was shown that the maximum factor by which the amplitude of forced vibration of blades can increase due to mistuning is, with certain assumptions, 1/2(1 + N), where N is the ... -
Dynamic Stability of a Water Brake Dynamometer
(The American Society of Mechanical Engineers (ASME), 1998)A lumped parameter model to predict the high frequency pressure oscillations observed in a water brake dynamometer is presented. It explains how the measured low frequency variations of the ... -
Control System for a 373 kW, Intercooled, Two-Spool Gas Turbine Engine Powering a Hybrid Electric World Sports Car Class Vehicle
(The American Society of Mechanical Engineers (ASME), 1998)SatCon Technology Corporation has completed design, fabrication, and the first round of test of a 373 kW (500 hp), two-spool, intercooled gas turbine engine with integral induction type alternators. ... -
High-Speed Rotor Losses in a Radial Eight-Pole Magnetic Bearing: Part 2—Analytical/Empirical Models and Calculations
(The American Society of Mechanical Engineers (ASME), 1998)The continual increase in the use of magnetic bearings in various capacities, including high-speed aerospace applications such as jet engine prototypes, dictates the need to quantify power losses ... -
The Applicability of Jet-Shear-Layer Mixing and Effervescent Atomization for Low-NOx Combustors
(The American Society of Mechanical Engineers (ASME), 1998)An investigation has been conducted to develop appropriate technologies for a low-NOx , liquid-fueled combustor. The combustor incorporates an effervescent atomizer used to inject fuel into a ... -
An Experimental/Computational Study of Airflow in the Combustor–Diffuser System of a Gas Turbine for Power Generation
(The American Society of Mechanical Engineers (ASME), 1998)This paper presents an experimental/computational study of cold flow in the combustor–diffuser system of industrial gas turbines employing can-annular combustors and impingement-cooled transition ... -
Optical Measurement of Gas Turbine Engine Soot Particle Effluents
(The American Society of Mechanical Engineers (ASME), 1998)This paper addresses optical-based techniques for measuring soot particulate loading in the exhaust stream of gas turbine engines. The multi-angle scattering and multi-wavelength extinction of light ... -
Numerical Studies on Trapped-Vortex Concepts for Stable Combustion
(The American Society of Mechanical Engineers (ASME), 1998)Spatially locked vortices in the cavities of a combustor aid in stabilizing the flames. On the other hand, these stationary vortices also restrict the entrainment of the main air into the ... -
Prediction of the Three-Dimensional Reacting Two-Phase Flow Within a Jet-Stabilized Combustor
(The American Society of Mechanical Engineers (ASME), 1998)Numerical calculations of the two-phase flow in an experimentally well-investigated research combustor are presented. The comparison between measurements and calculations demonstrates the capabilities ... -
Development of a Dry Ultra-Low NOx Double Swirler Staged Gas Turbine Combustor
(The American Society of Mechanical Engineers (ASME), 1998)This paper describes the development of an ultra-low NOx gas turbine combustor for cogeneration systems. The combustor, called a double swirler staged combustor, utilizes three-staged premixed ... -
NOx-Abatement Potential of Lean-Premixed GT Combustors
(The American Society of Mechanical Engineers (ASME), 1998)The influence of the structure of perfectly premixed flames on NOx formation is investigated theoretically. Since a network of reaction kinetics modules and model flames is used for this purpose, ... -
Combustion Instability Investigations on the BR710 Jet Engine
(The American Society of Mechanical Engineers (ASME), 1998)During the development of the BR710 jet engine, audible combustor instabilities (termed “rumble”) occurred. Amplitudes measured with test cell microphones were up to 130 dB at around 100 Hz. ... -
Oxidation Resistance and Critical Sulfur Content of Single Crystal Superalloys
(The American Society of Mechanical Engineers (ASME), 1998)Single crystal superalloys had greatly improved cyclic oxidation resistance when their sulfur content was reduced from impurity levels, typically 5–10 ppmw in past years, down to 1 ppmw or below ... -
Characterization of Contact Kinematics and Application to the Design of Wedge Dampers in Turbomachinery Blading: Part 2—Prediction of Forced Response and Experimental Verification
(The American Society of Mechanical Engineers (ASME), 1998)In the second part of this paper, the application of the proposed dual-interface model to the prediction of the forced response of a blade constrained by wedge dampers will be presented. When ...