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 106 for “"refueling"”.
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Modeling Aerial Refueling Operations
Aerial Refueling: AR) is the act of offloading fuel from one aircraft: the tanker) to another aircraft: the receiver) in mid flight. Meetings between tanker and receiver aircraft are referred to as AR events and are scheduled to: escort one or more receivers across a large body of water; refuel one …
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Improving Aircraft Refueling Procedures at Naval Air Station Oceana
This thesis seeks to improve aircraft refueling at Naval Air Station (NAS) Oceana, VA, using aircraft waiting time for fuel as a measure of performance. We develop a computer-assisted discrete-event simulation to model refueling at NAS Oceana using airfield data from October 2011. Our study focuses …
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On-line refueling for the advanced high temperature reactor
… reference design is based on a traditional batch refueling approach, which requires to shut down the reactor and replace/reshuffle a certain amount of fuel assemblies in the core at a specific frequency. Several options have been evaluated in the design process, in order to maximize the lifetime …
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Multidisciplinary Architectural Study of On-Orbit Space Vehicle Refueling
… In space servicing, specifically on-orbit refueling offers a chance to achieve these ambitious space mission goals. To understand how on-orbit architectures can produce value for space systems a Technology Roadmapping method is used to analyze the foundations of on-orbit refueling, …
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Study of advanced railgun hydrogen pellet injectors for fusion reactor refueling
An advanced railgun system has been developed to assess its feasibility as a hypervelocity hydrogen pellet injector for magnetically confined plasmas. It consists of a pellet generator/gas gun assembly for freezing hydrogen pellets and injecting them into the railgun at velocities as high as 1.5 …
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Alternative fuel vehicles evacuation: routing, refueling infrastructure planning, and behavioral insights
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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System design and optimization of an aerial refueling system for transcontinental flights
… In this study, we propose a floating air refueling system (FARS) to reduce fuel costs on intercontinental flights. In this system, we launch a tanker to refuel incoming intercontinental aircraft. Through the refueling process, intercontinental flights avoid the exponential fuel consumption …
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After the gas station : redevelopment opportunities from rethinking America's vehicle refueling infrastructure
… to go largely unnoticed. Because their purpose - refueling vehicles - is so uniform and so integral to the existing automotive transportation system, stations share extensive siting and design similarities across many contexts. Recent corporate, market, and regulatory pressures have led to the …
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Nonlinear equilibrium and perturbation solutions for a hose-drogue aerial refueling system
… models are developed for a hose-drogue refueling system in an attempt to represent the physical system accurately and to subsequently observe the dynamic response of the system under different initial conditions. The mathematical models examined include a flexible hose model and a model …
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The Effects of Hackberry Psyllids on Refueling Migratory Songbirds and Autumnal Seed Rain
… abundant insect, affect migrating songbird refueling indices estimated from blood samples, foraging activity, and subsequent bird-dispersed seed rain patterns. I used end-point assays to measure bird metabolites to find that hackberry presence and hackberry psyllid were associated with …
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Optimization Models and Approximate Algorithms for the Aerial Refueling Scheduling and Rescheduling Problems
<p>The Aerial Refueling Scheduling Problem (ARSP) can be defined as determining the refueling completion times for fighter aircrafts (jobs) on multiple tankers (machines) to minimize the total weighted tardiness. ARSP can be modeled as a parallel machine scheduling with release times and due …
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Multi-Objective Exploration of Refueling Architecture for Sustainable Crewed and Cargo Space Transportation
… new integrated framework for evaluating in-space refueling architectures, focusing on their application to the human space missions such as Artemis. The framework tightly couples vehicle sizing with a boil-off control model, allowing the evaluation of various combinations of propellant types, …
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Stopover behavior and refueling physiology in relation to migration distance in Wilson's Warblers (Wilsonia Pusilla)
… within a species affects stopover behavior and refueling rate. Wilson’s Warbler is a leapfrog migrant passerine that winters in Central America and breeds throughout North America. Birds were captured in the spring and fall of 2006 during passage through a desert stopover site in southern …
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Application of Criteria for Hydrogen Transportation Refueling for Several Countries Considering Energy Resource and Use Implications
… study investigates the feasibility of hydrogen refueling for ground transportation by implementing the established criteria for transitioning from conventional fuels to hydrogen. The United States and the United Kingdom serve as base case studies for defining six primary criteria: feedstock, …
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The Design for Manufacturing and Assembly Analysis and Redesign of an Aircraft Refueling Door Hinge Utilizing Additive Manufacturing
<p>In this thesis, an aircraft door hinge assembly provided by Gulfstream Aerospace was analyzed following an established process called DFMA. The hinge was then redesigned to be additively manufactured, which is uncommon currently in industry for load bearing components. It was shown that the …
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Dynamic Modelling and Optimization of Hydrogen Refuelling Stations and Their Integration with Renewable Microgrids
… heavy-duty applications thanks to their short refueling times and high gravimetric energy density. However, the implementation of FCEVs requires the design of efficient hydrogen refueling stations (HRS) capable of ensuring safe, fast, and complete refueling, in compliance with international …
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Investigation of a Lagrangian-point Propellant Depot Rendezvous Approach for an Interplanetary Mission to Mars
<p>This thesis investigates the feasibility of a refueling station for a beyond Earth orbit (BEO) mission. The propellant depot is located at the <em> L</em><sub>2</sub> -Lagrangian point within the Earth-Moon system. This investigation determines if a refueling mission will reduce propulsive …
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Comparative Analysis of Source Term Removal at Cook Nuclear Plant
… Unit 1 has completed 22 cycles and refueling outages and Unit 2 has completed 18 cycles and refueling outages. Specialty resin was utilitized during the Unit 2 shutdown chemistry protocol to capture and remove Co-60 from the reactor coolant. A CRUD burst was achieved during the first …
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