Дисертації з теми "Jet Vehicle"
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Nyberg, Ludwig. "Thrust Allocation for Jet Driven Surface Vessels." Thesis, KTH, Mekatronik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-271905.
Повний текст джерелаDynamiska positioneringssystem har vart under utveckling sedan den första implementeringen i början av 1960-talet. Syftet med ett dynamiskt positioneringssystem är att möjliggöra automatisk positionering av ett fartyg när omständigheterna inte tillåter förtöjning eller förankring. Historiskt har utvecklingen drivits framåt av behovet inom offshoreindustrin, men under senare år har systemen visat sig vara användbara även i andra delar av den marina industrin. Idag finns dock få alternativ anpassade för jetdrivna fartyg. En av huvuddelarna i ett dynamiskt positioneringssystem är kraftallokering. Syftet med denna del är att fördela önskad styrkraft till tillgängliga ställdon. Ofta är det önskvärt att göra detta samtidigt som ett sekundärt mål tas hänsyn till, vanligtvis energiförbrukning. Ett alternativ för kraftallokering är en direkt allokeringsalgoritm, detta är en ganska enkel algoritm. Mer avancerade alternativ finns i litteraturen, men implementerade exempel är fortfarande ovanliga. Ett exempel på ett mer avancerat alternativ, som möjliggör bättre anpassning, är att använda modellbaserade algoritmer. Att formulera allokeringsproblemet som ett linjärt kvadratiskt problem och använda en linjär kvadratisk regulator är ett alternativ som har visat sig fungera bra för icke jetdrivna fartyg. En generell fartygsmodell utvecklas och anvnnds för att simulera och testa de olika allokeringsalgoritmerna. Vidare föreslås en metod för att omvandla den allokerade styrkraften till parametrar som kan styra jetmotorerna. Detta är ett nödvändigt steg för att, i slutändan, kunna implementera styrkrafterna på ett riktigt fartyg. En jämförelse av allokeringsalgoritmer baserade på stegsvar med och utan störningar visar att den linjära kvadratiska regulatorn hanterar de uppsatta testfallen bättre än den direkta allokeraren. Däremot dras den modellbaserade algoritmen med det problemet att omfattande kunskapen krävs angående systemets dynamik. Detta är något som inte krävs för direktallokeraren och är värt att ta hänsyn till.
Bergman, Niklas. "Effects of Mach cruise number on conventional civil jet aircraft sizing." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-7450.
Повний текст джерелаThis thesis work was executed at Swift Engineering Incorporated located in San Clemente, California during spring in 2009. Placement supervisor from Swift was Mark Page and advisor and examiner from the Division of future products at Mälardalen University, Sweden was Gustaf Enebog.
The objective with this thesis work was to examine the effects of fitness ratio, lift over drag, lift coefficient at cruise, winglet span, wing sweep angle, wing aspect ratio, wing area and weights with respect to Mach number for a conventional business jet capable of 18 passengers. The cruise speed study range from Mach 0.88 to 0.99.
The Excel based conceptual design tool Jetsizer 2008c was used to make four models with similar configuration and mission but with different cruise Mach numbers.
A new Jetsizer module was then created to handle a modification process where the models are optimized for their speed and configuration. The result in this report gives guidelines for the needed values when creating an initial CFD model for this type of airplane.
Schumacher, Viking Alex. "Jet Stream Velocity fromAzipod on Stadsgården : A Litterature Study of PIANC W.G. 180Application for Stadsgården." Thesis, KTH, Marina system, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-243091.
Повний текст джерелаFartygsföretaget VIKING LINE har beställt ett nytt fartyg med planerad leverans år 2020. Fartyget kommer att trafikera dagligen från Stockholm hamnen, Stadsgården. Fartyget är utrustat med två 10 MW Azipod propeller system. Detta nya framdrivningssystem har förmågan att rotera riktningen för propellern 360° vilket skiljer sig från andra fartyg som för närvarande använder samma hamn. Propeller riktning och avstånd från kajen har uppmärksammats hos Stockholms Hamnar. Stabiliteten av kajväggen på Stadsgården ska relateras till de riktlinjer som fastställs av PIANC Arbetsgrupp 180: "Guidelines for Protecting Berthing Structures from Scour Caused by Ships." Riktlinjerna har jämförts med ’actuator disc theory’ för att validera den ursprungliga jetströmhastigheten från den nya propellern. Spridningen av strålströmmen analyserades senare och en hastighet vid kajväggen beräknas. Brist på information från vissa parametrar i riktlinjerna har lett till implementeringar av antaganden. Osäkerheter i de metoder och ekvationer som presenteras i riktlinjerna diskuteras. Jetströmshastigheten från det nya fartyget jämförs med hastigheten från ett liknande fartyg som för närvarande utnyttjar samma hamn. Från jämförelsen framgår det att kajfronten kommer att exponeras för hastigheter fyra gånger större än de nuvarande jetströmshastigheterna på Stadsgården. En lista med rekommenderad åtgärd som kan utföras av Stockholms Hamnar presenteras.
Fung, Pearl Haiyan. "Flow control over a micro unmanned aerial vehicle using synthetic jet actuators." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/16950.
Повний текст джерелаOhanian, Osgar John. "Ducted Fan Aerodynamics and Modeling, with Applications of Steady and Synthetic Jet Flow Control." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27687.
Повний текст джерелаPh. D.
Wemming, Hannes. "Validation and integration of a rubber engine model into an MDO environment." Thesis, Linköpings universitet, Fluid och mekanisk systemteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-61028.
Повний текст джерелаKiran, Amit. "Jet noise : aeroacoustic distribution of a subsonic co-axial jet." Thesis, University of Warwick, 2008. http://wrap.warwick.ac.uk/3914/.
Повний текст джерелаMuse, Jonathan Adam. "An H-Infinity norm minimization approach for adaptive control." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34830.
Повний текст джерелаLuo, Xinfu. "Plasma based jet actuators for flow control." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/348870/.
Повний текст джерелаMcLaughlin, Philip. "A contribution to the jet noise installation problem." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/190205/.
Повний текст джерелаHu, Xiaowei. "A study of nozzle jet application to winter maintenance vehicles." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1447630.
Повний текст джерелаWhitehead, James Anthony. "Aerodynamics and propulsion of synthetic jet based micro air vehicles." Thesis, University of Bath, 2004. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409883.
Повний текст джерелаPreston, Giles Andrew. "Modelling sound source regions for the prediction of coaxial jet noise." Thesis, University of Southampton, 1995. https://eprints.soton.ac.uk/173779/.
Повний текст джерелаAzarpeyvand, Mahdi. "Some aspects of RANS based jet noise prediction." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/66622/.
Повний текст джерелаPerera, Guruge Elmo Lakshman. "A vertical axis wind turbine generator based on the tangential wall-jet action." Thesis, University of Huddersfield, 1988. http://eprints.hud.ac.uk/id/eprint/7480/.
Повний текст джерелаBassetti, Alessandro. "A statistical jet-noise model based on the acoustic analogy and a RANS solution." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/64784/.
Повний текст джерелаAl, Haddabi Naser Hamood. "Subsonic open cavity flows and their control using steady jets." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/9096/.
Повний текст джерелаToulson, Elisa. "Applying alternative fuels in place of hydrogen to the jet ignition process /." Connect to thesis, 2008. http://repository.unimelb.edu.au/10187/3532.
Повний текст джерелаLawrence, Jack. "Aeroacoustic interactions of installed subsonic round jets." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/367059/.
Повний текст джерелаGildner, Matthew Lee. "Framework for multi-vehicle adaptive sampling of jets and plumes in coastal zones." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/80664.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 125-130).
This thesis presents a framework for the sampling of thermal and effluent jets and plumes using multiple autonomous surface vehicles. The framework was developed with the goal of achieving rapid and accurate in-situ measurement and characterization of these features. The framework is presented as a collection of simulation, estimation and field tools for use within the Mission Oriented Operations Suite (MOOS) and a novel Acoustic Doppler Current Profiling system that is capable of reorientation and real-time feedback. Key features developed within MOOS include a multi-parameter model of thermal and effluent jet and plume fields, online parameter estimation and sensor fusion. Using these tools, a collaborative adaptive sampling strategy is implemented to efficiently sample an industrial jet and plume. The capabilities of this strategy are demonstrated in realistic mission simulations and in field trials using a fleet of autonomous kayaks equipped with environmental sensors.
by Matthew Lee Gildner.
S.M.
Beales, Brian O. "F-22 versus UCAV fixing today's deficiencies leaves questions about tomorrow's dominance." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FBeales.pdf.
Повний текст джерелаThesis Advisor(s): Looney, Robert E. ; McNab, Robert M. "December 2009." Description based on title screen as viewed on January 27, 2010. Author(s) subject terms: F-22, MQ-1, MQ-9, UCAV, homeland defense, aircraft effectiveness, defense spending, manned flight, unmanned flight. Includes bibliographical references (p. 71-76). Also available in print.
Zakaria, Rami. "Jet fuel spray characterisation using optical methods : an experimental study of high speed fuel injection systems in small rotary engines." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/54103/.
Повний текст джерелаHennig, Christian [Verfasser]. "Improvements in thrust and fuel consumption for future jet engines for unmanned aerial vehicles (UAV) using variable cycle technology / Christian Hennig." München : Verlag Dr. Hut, 2017. http://d-nb.info/1139539094/34.
Повний текст джерелаKrolak, Matthew Joseph. "Optimization of a magnetoplasmadynamic arc thruster." Link to electronic thesis, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-042607-155701/.
Повний текст джерелаJewkes, James. "An improved turbulent boundary layer inflow condition, applied to the simulation of jets in cross-flow." Thesis, University of Warwick, 2008. http://wrap.warwick.ac.uk/2372/.
Повний текст джерелаLittlewood, Rob. "Novel methods of drag reduction for squareback road vehicles." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12534.
Повний текст джерелаSchroeder, Olivia. "Verification and Validation Studies for the KATS Aerothermodynamics and Material Response Solver." UKnowledge, 2018. https://uknowledge.uky.edu/me_etds/122.
Повний текст джерелаSerdane, Thierry. "Le jeu vidéo, un art mécanique ? : se réapproprier la contre-culture." Thesis, Montpellier 3, 2014. http://www.theses.fr/2014MON30093/document.
Повний текст джерелаFrom the problematic confrontation of a video game project with the multiple conditions ofits creation, the present thesis tries to highlight the constraints and the interrogations whichthey arouse. Contemporary to the information society, the video game is a witness of thecomplex evolution of the postmodern paradigm born from cybernetics. From the genesis ofthe video game to present time, technologies, the ways of playing and the productions revealthe significant oppositions in their visions of the world. The thesis shows that behind theimage of entertainment and of a consensual industry, a form of resistance can express/voiceitself from a technological, artistic and political point of view. Through the history of videogame and its future, one can read some of society’s stakes/challenges linked to new formsof power. It is within a counter cultural interstice, and fed by a prior critical exam, thata resistant work/piece is developed. An original creation is progressively built in reflexivecounter cultural opposition to the mainstream dominant liberal world and its accelerationand dematerialization... From a plastic point of view, the thesis questions the return of thevirtual reality technologies, and elaborates two new notions: the experiential vehicle and thesufficient decoy. Taking advantage of this new field of investigation of creation, the thesisinvites the player to let it be used so as to do so. Keywords: Video games. Counter culture.Experiential vehicle. Counter dematerialization. Sufficient decoy
Raszka, Aleš. "Klasifikace vozidel s použitím radaru." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2017. http://www.nusl.cz/ntk/nusl-363896.
Повний текст джерелаAdler, Martin, Stefanie Peer, and Tanja Sinozic. "Autonomous, connected, electric shared vehicles (ACES) and public finance: An explorative analysis." Elsevier, 2019. http://epub.wu.ac.at/7200/1/main.pdf.
Повний текст джерелаKorzun, Ashley Marie. "Aerodynamic and performance characterization of supersonic retropropulsion for application to planetary entry and descent." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43667.
Повний текст джерелаChaligné, Sébastien. "Contrôle du sillage d'un corps non profilé : application expérimentale à une maquette simplifiée de véhicule industriel." Phd thesis, Ecole Centrale de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00995837.
Повний текст джерелаBirhanie, Habtamu. "Resource Allocation in Vehicular Fog Computing for an Optimal Use of EVs Electric Vehicles Energy." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK042.
Повний текст джерелаAbstract: Technological advancements made it possible for Electric vehicles (EVs) to have onboard computation, communication, storage, and sensing capabilities. Nevertheless, most of the time these EVs spend their time in parking lots, which makes onboard devices cruelly underutilized. Thus, a better management and pooling these underutilized resources together would be strongly recommended. The new aggregated resources would be useful for traffic safety applications, comfort related applications or can be used as a distributed data center. Moreover, parked vehicles might also be used as a service delivery platform to serve users. Therefore, the use of aggregated abundant resources for the deployment of different local mobile applications leads to the development of a new architecture called Vehicular Fog Computing (VFC). Through VFC, abundant resources of vehicles in the parking area, on the mall or in the airport, can act as fog nodes. In another context, mobile applications have become more popular, complex and resource intensive. Some sophisticated embedded applications require intensive computation capabilities and high-energy consumption that transcend the limited capabilities of mobile devices. Throughout this work, we tackle the problem of achieving an effective deployment of a VFC system by aggregating unused resources of parked EVs, which would be eventually used as fog nodes to serve nearby mobile users’ computation demands. At first, we present a state of the art on EVs and resource allocation in VFC. In addition, we assess the potential of aggregated resources in EVs for serving local mobile users’ applications demands by considering the battery State of Health (SOH) and State of Charge (SOC). Here, the objective is to choose EVs with a good condition of SOH and SOC so that owners secure tolerable amount of energy for mobility. Then, we address the problem of resource allocation scheme with a new solution based on Markov Decision Process (MDP) that aims to optimize the use of EVs energy for both computing users’ demands and mobility. Hence, the novelty of this contribution is to take into consideration the amount of aggregated EVs resource for serving users’ demands. Finally, we propose a stochastic theoretical game approach to show the dynamics of both mobile users’ computation demands and the availability of EVs resources
Matucha, Tomáš. "Nezávislý nízkonapěťový trakční asynchronní pohon." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233490.
Повний текст джерелаTošer, Pavel. "Zkoumání teplotních změn vlastností olověného akumulátoru v režimu hybridních vozidel." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218567.
Повний текст джерелаMariette, Kevin. "Contrôle en boucle fermée pour la réduction active de traînée aérodynamique des véhicules." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI088.
Повний текст джерелаActive flow control techniques can decrease the aerodynamic drag acting on a vehicle moving at high velocity. Instead of exclusively passive techniques, active control can reduce the pressure drag on a vehicle under a wider range of operating conditions without requiring large modifications of the functional shape of the vehicles. However, active control devices require an additional source of energy, which may decrease the global efficiency of the control. Our work aims to reduce significantly the drag of ground vehicles with efficiency and robustness thanks to high frequency pulsed jet control. We present experimental studies on a simplified bluff body mock-up of a ground vehicle and we seek to understand the phenomena linked to the pressure drag on a vehicle. In this thesis, we propose a modelling methodology of the vehicle’s turbulent wake adapted for control purposes. Finally, we design and test experimentally different closed-loop control methods of the wake with high frequency pulsed air jets. The experimental studies performed in a wind tunnel show the efficient application of sliding mode control and extremum seeking techniques for a robust drag control with energy cost considerations. This thesis was financed by the French National Research Agency (ANR) and contributes to the project ActivRoad involving three French laboratories: Ampère (INSA, Lyon), Pprime Institute (ENSMA, Poitiers), and the LMFA (Centrale, Lyon); and two automotive companies: PSA group and Volvo Trucks
CHEN, YU-HENG, and 陳昱恆. "The Study on the Performance and Design Analysis of the Pump-Jet for Amphibious Wheel Type Vehicle." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/w2r35u.
Повний текст джерелаMiller, Warrick Alan. "Reaction Control Jet Actuators for Air-Breathing Hypersonic Vehicles." Thesis, 2019. http://hdl.handle.net/2440/120374.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Mechanical Engineering, 2019
Gangadharan, Sathya Narayan. "Feasibility study of jet propulsion for remote operated underwater vehicles /." 1986. http://collections.mun.ca/u?/theses2,4018.
Повний текст джерелаToulson, E. "Applying alternative fuels in place of hydrogen to the jet ignition process." 2008. http://repository.unimelb.edu.au/10187/3532.
Повний текст джерелаThe benefits from the low temperature combustion at λ = 2 and leaner are that almost zero NOx is formed and there is an improvement in thermal efficiency. Efficiency improvements are a result of the elimination of dissociation, such as CO2 to CO, which normally occurs at high temperatures, together with reduced throttling losses to maintain the same road power. It is even possible to run the engine in an entirely unthrottled mode, but at λ = 5.
Although only a small amount of H2 is required for the HAJI process, it is difficult to both refuel H2 and store it onboard. In order to overcome these obstacles, the viability of a variety of more convenient fuels was experimentally assessed based on criteria such as combustion stability, lean limit and emission levels. The prechamber fuels tested were liquefied petroleum gas (LPG), natural gas, reformed gasoline and carbon monoxide. Additionally, LPG was employed as the main fuel in conjunction with H2 or LPG in the prechamber. Furthermore, the effects of HAJI operation under sufficient exhaust gas recirculation to allow stoichiometric fuel-air supply, thus permitting three-way catalyst application were also examined.
In addition to experiments, prechamber and main chamber flame propagation modeling was completed to examine the effects of each prechamber fuel on the ignition of the main fuel, which consisted of either LPG or gasoline. The modeling and experimental results offered similar trends, with the modeling results giving insight into the physiochemical process by which main fuel combustion is initiated in the HAJI process.
Both the modeling and experimental results indicate that the level of ignition enhancement provided by HAJI is highly dependent on the generation of chemical species and not solely on the energy content of the prechamber fuel. Although H2 was found to be the most effective fuel, in a study of a very light load condition (70 kPa MAP) especially when running in the ultra-lean region, the alternative fuels were effective at running between λ = 2-2.5 with almost zero NOx formation. These lean limits are about twice the value possible with spark ignition (λ = 1.25) in this engine at similar load conditions. In addition, the LPG results are very encouraging as they offer the possibility of a HAJI like system where a commercially available fuel is used as both the main and prechamber fuel, while providing thermal efficiency improvements over stoichiometric operation and meeting current NOx emission standards.
Lopez, Mejia Omar Dario. "Computational study of a NACA4415 airfoil using synthetic jet control." 2009. http://hdl.handle.net/2152/10683.
Повний текст джерелаtext