Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 191 for “"Gas Turbines"”.
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Modeling, simulation, and control of gas turbines.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1972. M.S.
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Simulation of Isothermal Combustion in Gas Turbines
Current improvements in gas turbine engine performance have arisen primarily due to increases in turbine inlet temperature and compressor pressure ratios. However, a maximum possible turbine inlet temperature exits in the form of the adiabatic combustion temperature of the fuel. In addition, …
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Data-driven models for reliability prognostics of gas turbines
… data-driven models of a commercially operating gas turbine, and applies inference techniques for reliability prognostics. The models focus on capturing feature signals (continuous state) and operating modes (discrete state) that are representative of the remaining useful life of the solid welded …
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Hot section components life usage analyses for industrial gas turbines
Industrial gas turbines generally operate at a bit stable power levels and the hot section critical components, especially high pressure turbine blades are prone to failure due to creep. In some cases, plants are frequently shut down, thus, in addition to creep low cycle fatigue failure equally …
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Investigation of Pin Fin Cooling Channels for Applications in Gas Turbines
<p>Gas turbine blades are often cooled using internal cooling channels to prevent failure at temperatures beyond material limitations. Pin fin channels are commonly used on the trailing edge of the blades, where they enhance heat transfer and also provide structural support. This study focuses on …
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Development of mesoscale burner arrays for next generation compact gas turbines
… a multi-node mesoscale burner array for compact gas turbines was developed. The burner array was designed to improve the overall combustion stability by exploiting flame-to-flame interactions under fuel-lean operation. Moreover, its design can be adjusted by scaling the element dimensions or …
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Aero-thermal-mechanical interactions in ultra high-speed micro gas turbines
… engine components in an ultra high-speed micro gas turbine engine system is assessed. Scaling down gas turbine engines for high performance requirement dictates substantial thermal-induced effects on engine operation due to high temperature gradient relative to that in conventional large gas …
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Acoustic and thermal packaging of small gas turbines for portable power
… number of studies have focused on portable small gas turbines. This research is concerned with gas turbine generator units in the 1 kW range. The compact and small-scale architecture of the portable gas turbine engine poses major challenges in the acoustic treatment that is required to attenuate …
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Design and application of advanced control methods to gas turbines and networked systems
… control techniques to a Rolls Royce aircraft gas turbine engine and networked systems. It is motivated by the need to fully exploit recent advances in control engineering and investigate the suitability of various control methods to gas turbine engines and networked systems.<br/><br/>The main …
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Thermoeconomic Diagnosis of anUrban District Heating System based onCogenerative Steam and Gas Turbines
… to two energy systems: a steam turbine and a gas turbine plants, both able to also provide thermal power to an urban district heating network. A mathematical model of the plants, described in the first chapter, has been built in order to simulate their behaviour. Some anomalies have been …
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A new diagnostics tool for water injected gas turbines - emissions monitoring and modeling
Natural gas-fired cogeneration systems are commonly used for large-scale industrial energy production – both electricity generation and heat recovery. Industrial cogeneration currently represents about 8% of the U.S. total electricity generation capacity. Plans call for cogeneration to increase to …
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The simulation of gas turbines by a state of the art analog device.
Thesis. 1978. Ocean E.--Massachusetts Institute of Technology. Dept. of Ocean Engineering.
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Heat Transfer Performance Improvement Technologies for Hot Gas Path Components in Gas Turbines
… past few decades, the operating temperatures of gas turbine engines have increased significantly with a view towards increasing the overall thermal efficiency and specific power output. As a result of increased turbine inlet temperatures, the hot gas path components downstream of the combustor …
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A Lean-Premixed Hydrogen Injector with Vane Driven Swirl for Application in Gas Turbines
… the potential to increase the efficiency of a gas turbine as well as reduce emissions of greenhouse gases. In addition to significantly reducing the number of pollutants due to the absence of carbon, burning hydrogen at low equivalence ratios can significantly reduce emissions of oxides of …
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Multi-point temperature sensing in gas turbines using fiber-based intrinsic Fabry-Perot interferometers
… were installed on a 2â x2â coupon in a simulated gas turbine environment. Final results are presented and analyzed. The work that went into developing this chain lays the foundation for future efforts in developing quasi-distributed temperature sensors by identifying potential obstacles and …
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Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines
… and deposition is an issue of concern for gas turbine engines operating in harsh environments. The ingested particles accelerate the deterioration of engine components and thus reduce its service life. This effect is observed to a greater extent in aircrafts/helicopters operating in …
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