Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 6061-6080 of 9564
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Periodic Response of Blades Having Three-Dimensional Nonlinear Shroud Constraints
(The American Society of Mechanical Engineers (ASME), 2001)In this paper, a three-dimensional shroud contact model is employed to predict the periodic response of blades having three-dimensional nonlinear shroud constraint. When subjected to periodic ... -
Comparison of the Dynamic Characteristics of Smooth Annular Seals and Damping Seals
(The American Society of Mechanical Engineers (ASME), 2001)Annular seals are known to enhance rotordynamic stability margins and minimize vibration response levels in high-speed rotating machinery. Theoretical predictions for the rotordynamic characteristics ... -
Reliable Rotor Dynamic Design of High-Pressure Compressors Based on Test Rig Data1
(The American Society of Mechanical Engineers (ASME), 2001)The overall design of high-pressure centrifugal compressors is largely influenced by rotordynamic aspects. Rotor instability may restrict operating speed and/or maximum discharge pressure if the ... -
Self-Sensing in Fault Tolerant Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2001)Several schemes have recently been proposed for achieving either fault tolerance or self-sensing in magnetic bearings. The present work describes the fundamental connection between ability to ... -
Sliding Mode Control of Magnetic Bearings: A Hardware Perspective
(The American Society of Mechanical Engineers (ASME), 2001)The physical hardware of magnetic bearing systems has a very strong impact on the application of sliding mode control to this technology. Finite current slew rates affect the character of ... -
Air Entrainment Versus Lubricant Vaporization in Squeeze Film Dampers: An Experimental Assessment of Their Fundamental Differences
(The American Society of Mechanical Engineers (ASME), 2001)Squeeze film dampers (SFDs) provide structural isolation and energy dissipation in air-breathing engines and process gas compressors. However, SFDs are prone to develop a flow regime where the ... -
Numerical Simulation of Swirl-Stabilized Premixed Flames With a Turbulent Combustion Model Based on a Systematically Reduced Six-Step Reaction Mechanism
(The American Society of Mechanical Engineers (ASME), 2001)This paper presents the application of a detailed combustion model for turbulent premixed combustion to a swirl-stabilized premix burner. Computations are carried out for atmospheric pressure and ... -
The Nonlinear Response of Multimode Rotors Supported on Squeeze Film Dampers
(The American Society of Mechanical Engineers (ASME), 2001)This paper describes the development of an extremely fast method to obtain the unbalance response of multiple mode rotors supported on squeeze film dampers (SFDs). Planar modal analysis theory ... -
A Reduced-Order Model of Mistuning Using a Subset of Nominal System Modes
(The American Society of Mechanical Engineers (ASME), 2001)Reduced-order models have been reported in the literature that can be used to predict the harmonic response of mistuned bladed disks. It has been shown that in many cases they exhibit structural ... -
Blade Life: A Comparison by Cumulative Damage Theories
(The American Society of Mechanical Engineers (ASME), 2001)A turbine blade is modeled as a rotating pretwisted beam and subjected to aerodynamic excitation from the flow path interference. The resonant stresses are determined using a modal analysis. ... -
Acoustic Resonances of an Industrial Gas Turbine Combustion System
(The American Society of Mechanical Engineers (ASME), 2001)A theory is developed to describe low-frequency acoustic waves in the complicated diffuser/combustor geometry of a typical industrial gas turbine. This is applied to the RB211-DLE geometry to ... -
Experimental and Numerical Investigation of a Planar Combustor Sector at Realistic Operating Conditions
(The American Society of Mechanical Engineers (ASME), 2001)Results of an ongoing collaboration between the engine manufacturer MTU and the German aerospace research center DLR on the NOx reduction potential of conventional combustors are reported. A ... -
Evaluation of Advanced Two-Phase Flow and Combustion Models for Predicting Low Emission Combustors
(The American Society of Mechanical Engineers (ASME), 2001)The development of low-emission aero-engine combustors strongly depends on the availability of accurate and efficient numerical models. The prediction of the interaction between two-phase flow and ... -
Self-Excited Oscillations in Combustors With Spray Atomizers
(The American Society of Mechanical Engineers (ASME), 2001)Combustors with fuel-spray atomizers are susceptible to a low-frequency oscillation, particularly at idle and sub-idle conditions. For aero-engine combustors, the frequency of this oscillation is ... -
Reduced NOx Diffusion Flame Combustors for Industrial Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2001)This paper describes reduced NOx diffusion flame combustors that have been developed for both simple cycle and regenerative cycle MS3002 and MS5002 gas turbines. Laboratory tests have shown that ... -
Integrated Experimental and Numerical Approach for Fuel-Air Mixing Prediction in a Heavy-Duty Gas Turbine LP Burner
(The American Society of Mechanical Engineers (ASME), 2001)An integrated experimental-numerical procedure has been developed for fuel-air mixing prediction in a heavy-duty gas turbine burner. Optical measurements of the degree of mixing have been performed ... -
Flamelet Model of NOx in a Diffusion Flame Combustor
(The American Society of Mechanical Engineers (ASME), 2001)This paper describes a model used for the prediction of the formation of nitrogen oxides in modifications of an industrial diffusion flame, natural gas fueled can combustor. The flowfield inside ... -
Response of a Model Gas Turbine Combustor to Variation in Gaseous Fuel Composition
(The American Society of Mechanical Engineers (ASME), 2001)The effect of fuel composition on performance is evaluated on a model gas turbine combustor designed to mimic key features of practical devices. A flexible fuel injection system is utilized ... -
Research on a Methane-Fueled Low NOx Combustor for a Mach 3 Supersonic Transporter Turbojet Engine
(The American Society of Mechanical Engineers (ASME), 2001)Methane-fueled low NOx combustor research had been conducted under the Japanese supersonic/hypersonic propulsion research program. A unique form of premixture jet swirl combustor (PJSC) was proposed ... -
Application of Macrolamination Technology to Lean, Premixed Combustion
(The American Society of Mechanical Engineers (ASME), 2001)Macrolamination, a novel manufacturing technique, is used to develop a dual-fuel premixer. A spatially distributed injection strategy is used to enhance fuel placement, distribution, and mixing ...