Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 10. Journal of engineering for gas turbines and power - Octobre 2011
| Titre : | Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 10. Journal of engineering for gas turbines and power - Octobre 2011 |
| Type de document : | Bulletin |
| Paru le : | 17/10/2011 |
Dépouillements
Article : texte imprimé
David Munday, Auteur ;
Nick Heeb, Auteur ;
Ephraim Gutmark, Auteur
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This paper presents observations and simulations of the impact of several technologies on modifying the flow-field and acoustic emissions from supersonic jets from nozzles typical of those used on military aircraft. The flow-field is measured ex[...]
Article : texte imprimé
Stephan Burmberger, Auteur ;
Thomas Sattelmayer, Auteur
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A frequently employed method for aerodynamic flame stabilization in modern premixed low emission combustors is the breakdown of swirling flows; with carefully optimized tailoring of the swirler, a sudden transition in the flow field in the combu[...]
Article : texte imprimé
Sebastian Schimek, Auteur ;
Jonas P. Moeck, Auteur ;
Christian Oliver Paschereit, Auteur
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Due to stringent emission restrictions, modern gas turbines mostly rely on lean premixed combustion. Since this combustion mode is susceptible to thermoacoustic instabilities, there is a need for modeling tools with predictive capabilities. Line[...]
Article : texte imprimé
Amin Akbari, Auteur ;
Scott Hill, Auteur ;
Vincent McDonell, Auteur
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The mixing of fuel and air in combustion systems plays a key role in overall operability and emissions performance. Such systems are also being looked to for operation on a wide array of potential fuel types, including those derived from renewab[...]
Article : texte imprimé
Marvin Zaluski, Auteur ;
Sylvain Létourneau, Auteur ;
Jeff Bird, Auteur
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The CF-18 (CF denotes Canadian Forces) aircraft is a complex system for which a variety of data are systematically being recorded: flight data from sensors, built-in test equipment data, and maintenance data. Without proper analytical and statis[...]
Article : texte imprimé
R. Bettocchi, Auteur ;
M. Morini, Auteur ;
M. Pinelli, Auteur
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At present, inlet fogging and wet compression are two of the most widely used approaches to enhance gas turbine performance, especially during hot seasons. However, potentially negative effects of these practices on long-term operational integri[...]
Article : texte imprimé
S. Sato, Auteur ;
S. Jovanovic, Auteur ;
J. Lang, Auteur
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A compact, high power density turbo-generator system was conceived, designed, and experimentally tested. The air-to-power (A2P) device with a nominal design point of 50 W electric power output operates on high pressure air such as from a plant p[...]
Article : texte imprimé
Bruce A. Pint, Auteur ;
Michael P. Brady, Auteur ;
Yukinori Yamamoto, Auteur
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A corrosion- and creep-resistant austenitic stainless steel has been developed for advanced recuperator applications. By optimizing the Al and Cr contents, the alloy is fully austenitic for creep strength while allowing the formation of a chemic[...]
Article : texte imprimé
Jerzy T. Sawicki, Auteur ;
Dmitry L. Storozhev, Auteur ;
John D. Lekki, Auteur
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This paper addresses self-diagnostic properties of active magnetic bearing (AMB) supported rotors for online detection of the transverse crack on a rotating shaft. In addition to pure levitation, the rotor supporting bearing also serves as an ac[...]
Article : texte imprimé
Y.-J. Chan, Auteur ;
D. J. Ewins, Auteur
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It is known that small differences between nominally identical turbomachine blades, known as mistuning, can lead to significant variation in their vibration response levels. A commonly used term in mistuning studies called the “amplification fac[...]
Article : texte imprimé
E. P. Petrov, Auteur
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A highly accurate and computationally efficient method is proposed for reduced modeling of jointed structures in the frequency domain analysis of nonlinear steady-state forced response. The method has significant advantages comparing with the po[...]
Article : texte imprimé
J. Jeffrey Moore, Auteur ;
Andrew Lerche, Auteur ;
Timothy Allison, Auteur
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The use of gas bearings has increased over the past several decades to include microturbines, air cycle machines, and hermetically sealed compressors and turbines. Gas bearings have many advantages over traditional bearings, such as rolling elem[...]
Article : texte imprimé
Baratta, Mirko, Auteur ;
Andrea E. Catania, Auteur ;
Alessandro Ferrari, Auteur
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A new multizone premixed-diffusive combustion model has been developed, assessed, and applied to diagnose the burning process and emission formation in a conventional and in a premixed charge compression ignition (PCCI) diesel engine. The model [...]
Article : texte imprimé
Vadim Verlotski, Auteur ;
Rudolf H. Stanglmaier, Auteur ;
Günter Moormann, Auteur
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Many marine and stationary engines operate on fuels that contain corrosive elements, with the result that some highly loaded combustion chamber components must be replaced frequently. Märkisches Werk, GmbH (MWH) has pioneered the development of [...]
Article : texte imprimé
Dustin Osborne, Auteur ;
Steve Fritz, Auteur ;
Doug Glenn, Auteur
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This paper documents the exhaust emission test results from a Tier 2 General Electric ES44DC line-haul locomotive with 3280 kW rated traction power and the impact of biodiesel fuel blends on regulated exhaust emissions. Baseline exhaust emission[...]
Article : texte imprimé
William F. Northrop, Auteur ;
Stanislav V. Bohac, Auteur ;
Jo-Yu Chin, Auteur
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Partially premixed low temperature combustion (LTC) is an established advanced engine strategy that enables the simultaneous reduction of soot and NOx emissions in diesel engines. Measuring extremely low levels of soot emissions achievable with [...]
Article : texte imprimé
Sage L. Kokjohn, Auteur ;
Rolf D. Reitz, Auteur
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In this work, a multimode combustion model that combines a comprehensive kinetics scheme for volumetric heat release and a level-set-based model for turbulent flame propagation is applied over the range of engine combustion regimes from non-prem[...]
Article : texte imprimé
Shigeki Senoo, Auteur ;
Kiyoshi Segawa, Auteur ;
Hisashi Hamatake, Auteur
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A computational technique for multistage steam turbines, which can allow for thermodynamic properties of steam, is presented. Conventional three-dimensional multistage calculations for unsteady flows have two main problems. One is the long compu[...]
Article : texte imprimé
Ibrahim A. Sultan, Auteur ;
Carl G. Schaller, Auteur
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Positive displacement expanders are quickly gaining popularity in the fields of micropower generation and refrigeration engineering. Unlike turbomachines, expanders can handle two-phase flow applications at low speed and flow rate levels. This p[...]
Article : texte imprimé
Bryan Li, Auteur ;
Mike J. Gross, Auteur ;
Thomas P. Schmitt, Auteur
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Gas turbine thermal performance is dependent on many external conditions, including fuel gas composition. Measured performance must be corrected to specified reference conditions prior to comparison against performance specifications. A performa[...]
Article : texte imprimé
V. N. Guruprakash, Auteur ;
Ranjan Ganguli, Auteur
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Measured health signals incorporate significant details about any malfunction in a gas turbine. The attenuation of noise and removal of outliers from these health signals while preserving important features is an important problem in gas turbine[...]
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