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 “"Aircraft Engine"”.
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Analysis of Japanese aircraft engine
… Institute of Technology. Dept. of Mechanical Engineering, 1947.
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Demand forecasting for aircraft engine aftermarket
… model aiming to supply spare parts to non-OEM engines with minimum 95% on-time delivery and fill-rate. Lacking essential technical knowledge of the target engines, predictability and associated confidence of the parts demands are very limited. This thesis focuses on exploring alternative and …
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Statistical modeling of aircraft engine fuel burn
Fuel burn is a key driver of aircraft performance, and contributes to airline costs and aviation emissions. While the trajectory (ground track) of a flight can be observed using surveillance systems, its fuel consumption is generally not disseminated by the operating airline. Emissions inventories …
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System integration analysis of a large commercial aircraft engine
… commercial high bypass-ratio turbofan engine, the Pratt & Whitney PW4098. This product is a derivative design of an existing configuration, or family of engines. Recommendations based upon the PW4098 application include specific interface management and system integration improvements, …
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In-Flight Fatigue Crack Monitoring of an Aircraft Engine Cowling
… a precursor of problems to come, as our nation’s aircraft age. These planes experience fatigue as they perform their daily routine of ferrying passengers from location to location. Fatigue can initiate cracking within the aircraft’s structure and at least damage a small expendable part of the …
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Impact of parametric aerothermal variability on aircraft engine operating cost
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
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Adaptive model-based control applied to a turbofan aircraft engine
… Institute of Technology, Dept. of Mechanical Engineering, 1990.
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An Intermittent-Combustion General Aviation Aircraft Engine Exhaust Noise Prediction Algorithm
… an environmental point of view, the reduction of aircraft noise has become an important factor recently. There are two factors that make airplane noise: propeller noise and engine noise. This report puts emphasis on only the engine noise in order to begin understanding what airplane engine exhaust …
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Marketing strategy in the commercial aircraft engine business : a case study
Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1986.
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Internal dynamics of the short-term commercial aircraft engine leasing market
General trends in the commercial aircraft aftermarket indicate an increased reliance of leased engines in operators' spare engine strategies. A methodology for forecasting short-term engine lease demand is developed using Pratt & Whitney's existing simulation capability. This method demonstrates …
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Design of a Total Pressure Distortion Generator for Aircraft Engine Testing
… for generating non-uniform, or distorted, aircraft engine inlet flow is being developed in order to account for dynamic changes during the creation and propagation of the distortion. Total pressure distortions occur in gas turbine engines when the incoming flow is disturbed. Dynamic total …
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Commericalization and transfer of technology in the U.S. jet aircraft engine industry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Aircraft engine performance improvements using multistage compressors with actively controlled stall lines
… Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Best practices in aircraft engine MRO : a study of commercial and military systems
… (MRO) is a key activity in the lifecycle of an aircraft and its engines. Because of the typically long operational lifetimes expected from these costly assets, MRO is necessary to maintain these systems in a safe and functional condition, so that they can fulfill the operational role that they …
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Designing a Make vs. Buy Strategy for Expendable and Attritable Aircraft Engine Development
Military aircraft engine customers are increasingly demanding agility and affordability for both engine development and production. In this thesis, we propose that this inflection point in aerospace and defense towards agility and affordability will be characterized by time-based competition and …
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Next generation commercial aircraft engine maintenance, repair, and overhaul capacity planning and gap analysis
A critical element in maintaining engine safety and in providing post-production service and support of a commercial aircraft engine is the complete worldwide network of maintenance, repair, and overhaul facilities. Matching forecasted shop visit demand to network-wide capacity is essential to …
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An Investigation on Acoustic Metamaterial Physics to Inspire the Design of Novel Aircraft Engine Liners
Attenuation of low frequency turbofan engine noise has been a challenging task in an industry that requires low weight and tightly-packed solutions. Without innovative advancements, the technology currently used will not be able to keep up with the increasingly stringent requirements on aircraft …
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Development of an object-oriented graphical user interface for an aircraft engine cycle analysis program
… an overwhelming amount of in-house and custom engineering software has been written. In the effort to reduce the cost of maintaining existing codes and producing new applications, the recent introduction of the object-oriented design approach has proved successful. At the same time graphical …
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Comparative Analysis of Serrated Trailing Edge Designs on Idealized Aircraft Engine Fan Blades for Noise Reduction
… on the flow-field downstream of an idealized aircraft engine fan blade row were investigated in detail. The measurements were performed in the Virginia Tech low speed linear cascade tunnel on one set of baseline GE-Rotor-B blades and four sets of GE-Rotor-B blades with serrated trailing edges. …
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Investigation of a compact acoustic source array for the active control of aircraft engine fan noise
… with a duct similar to that of a turbofan engine inlet. The sources were cylindrically curved aluminum panels excited in vibration by the application of a sinusoidally varying voltage to a piezoceramic actuator bonded to them. The finite element method was used as a design tool to size the …
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