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 80 for “"jet engine"”.
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De-commoditizing the commercial jet engine business
… application of the Delta Model at a major jet engine manufacturer. It will assess and contrast customer segmentation and customer value proposition via primary research. It will also assess and contrast the current and future state "bundle of competencies" within the firm. Utilizing the …
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Driving robust jet engine design through metrics
Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2000.
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Fault tolerant issues in jet engine compressor control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Virtual five-axis flank milling of jet engine impellers
… to simulate the five-axis flank milling of jet-engine impellers in a virtual environment. The impellers are used in the compression stage of the engine and are costly, difficult to machine, and time-consuming to manufacture. To improve the productivity of the flank milling operations, a …
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Lean transformation and relocation of jet engine assembly operations
… efforts at Pratt & Whitney, the Middletown Engine Center has turned its focus on the GP7000 turbofan engine as a target for lean implementation. Projected increases in GP7000 production volume over the next few years, along with aggressive cost reduction targets, are driving the current push …
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Predicting jet engine component wear to enable proactive fleet maintenance
… driver of maintenance costs for commercial jet engines is the replacement of components that, upon inspection, are determined to be damaged beyond their repairable limits. In order to better predict the lifetime cost of maintaining engines through its flight hour agreement program, Pratt & …
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Adaptive update method for embedded real-time jet engine models
… Institute of Technology, Dept. of Mechanical Engineering, 1985.
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Strategic Sourcing of Serial Production Processes in Jet Engine Manufacturing
Fabrication of an individual jet engine component at Pratt & Whitney can go through upwards of 40 manufacturing processes, from an airfoil’s single crystal casting to thermal plasma spray coatings and wire EDM-drilled cooling holes. Many of these processes are extremely specialized, requiring …
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Data driven low-bandwidth intelligent control of a jet engine combustor
<p>This thesis introduces a low-bandwidth control architecture for navigating the input space of an un-modeled combustor system between desired operating conditions while avoiding regions of instability and blow-out. An experimental procedure is discussed for identifying regions of instability and …
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A New Method for Generating Swirl Inlet Distortion for Jet Engine Research
Jet engines operate by ingesting incoming air, adding momentum to it, and exhausting it through a nozzle to produce thrust. Because of their reliance on an inlet stream, jet engines are very sensitive to inlet flow nonuniformities. This makes the study of the effects of inlet nonuniformities …
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Tip leakage flow, heat transfer and blade lifing in a jet engine turbine
… were determined. calculations for typical jet engine conditions, In the present a maximum tip temperature of 1488 K was predicted which would lead to high oxidation rates for present day turbine blade alloys.
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Numerical Investigation of Liquid Film Dynamics and Atomisation in Jet Engine Fuel Injectors
… example pollutant formation. In the context of jet engines, kerosene is usually injected in its liquid form via an airblast-type fuel injector. A coflowing high-speed airstream destabilises the liquid fuel, which is thus sprayed into fine droplets into the combustion chamber. The prediction of …
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Business modeling as a decision support tool in the jet engine aftermarket business
… Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Sloan School of Management, 1999.
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High-Fidelity Computational Analysis of the Aerothermal Performance of In-serviced Jet Engine Blades
… today’s civil aviation, the struggle for higher jet engine efficiencies has pushed the manufactures into the continuous challenge of developing new and better design and optimization strategies. In the information age, it is only natural that a great deal of this effort is going to be carried out …
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An application of modern control theory to a high bypass variable compressor geometry jet engine
… Institute of Technology, Dept. of Mechanical Engineering, 1981.
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Design development and analysis of a dual mode free piston jet engine with applications to light aircraft
Thesis. 1975. M.S.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Dynamic surface temperature measurement on the first stage turbine blades in a turbofan jet engine test rig
… studied during transient operation in a turbofan engine test rig. A single fiber radiation pyrometer was used to view the suction side of the blades from approximately 60 percent axial chord to the trailing edge at an average radial location of 70 percent blade height. A single ceramic-coated …
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A case study in application of robust design methods to waterjet processes in overhaul and repair of jet engine components
The North Berwick Engine Services (NBES) Business Unit at the Pratt & Whitney (PW) facility in North Berwick, Maine has identified the need to develop new for cleaning/stripping parts in the overhaul and repair cycle of jet engine components. I investigate the issues that must be answered for the …
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