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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Affes, Habib. "Tip-vortex/airframe interactions /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487777170407828.

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2

Peng, Di. "Vortex Dynamics and Induced Pressure/Load Fluctuations During Blade-Vortex Interactions." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408967632.

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3

Wu, Junxiao. "Numerical studies of plume-vortex interactions." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/11906.

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4

Thom, Alasdair D. "Analysis of vortex-lifting surface interactions." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/3037/.

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The interaction of a vortex with a lifting surface occurs in many aerodynamic systems, and can induce significant airloads and radiate impulsive noise. Yet due to their complex nature, the ability to accurately model the important flow physics and noise radiation characteristics of these interactions in realistic situations has remained elusive. This work examines two cases of vortex-lifting surface interactions by enhancing the capabilities of a high fidelity flow solver. This flow solver utilises high spatial discretisation accuracy with a 5th order accurate WENO scheme, and overset meshes t

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5

O'Reilly, Gerard Kieran Pullin Dale Ian. "Compressible vortices and shock-vortex interactions /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-05262004-145030.

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6

Pesce, Matthew M. "Unsteady pressure and vorticity fields in blade-vortex interactions." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03122009-040643/.

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7

鄧志剛 and Chi-kong Clief Tang. "The interactions of two perturbed vortex rings." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31241025.

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8

Tang, Chi-kong Clief. "The interactions of two perturbed vortex rings /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22050474.

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9

Clough, Ray Charles 1950. "Vortex interactions in an axisymmetric water jet." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276978.

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An axially symmetric water jet was designed and constructed to complement an existing air jet facility. The water jet operates at Reynolds numbers, based on nozzle diameter, up to 50,000. The jet is forced at high levels by a reciprocating Scotch yoke mechanism. By using an output signal from the Scotch yoke as a phase reference, it is possible to obtain either phase-locked hot film data or phase-locked photographs of the dye-marked coherent vortical structures in the shear layer. By assuming zero azimuthal velocity, continuity allows reconstruction of the vorticity field from the data obtaine

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10

Chaluvadi, Venkata Siva Prasad. "Blade-vortex interactions in high pressure steam turbines." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621152.

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11

Blackhurst, Tyler D. "Numerical Investigation of Internal Wave-Vortex Dipole Interactions." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3133.

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Three-dimensional linear ray theory is used to investigate internal waves interacting with a Lamb-Chaplygin pancake vortex dipole. These interactions involve waves propagating in the same (co-propagating) and opposite (counter-propagating) horizontal directions as the dipole translation. Co-propagating internal waves in the vertical symmetry plane between the vortices of the dipole can approach critical levels where the wave energy is absorbed by the dipole or where the waves are overturned and possibly break. As wave breaking cannot be simulated with this linear model, changes in wave steepne

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12

鄧兆強 and Shiu-keung Tang. "The aeroacoustics of free shear layers and vortex interactions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31233235.

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13

Dunn, David Christopher. "Vortex interactions with topographic features in geophysical fluid dynamics." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395836.

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14

Nilawar, R. S. "Effects of finite Rossby radius on vortex-boundary interactions." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1348497/.

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The effect of the finite Rossby radius on vortex motion is examined in a two-dimensional inviscid incompressible fluid, assuming quasigeostrophic dynamics in a single layer of fluid with reduced gravity for two geophysically significant problems: a vortex near a gap in a wall and a pair of steady translating vortices. For the motion of a point vortex near a gap in an infinite barrier, a key parameter determining the behaviour of the vortex is a, the ratio of the Rossby radius of deformation and the half-width of the gap. For large a, depending on the location of the vortex, a vortex sheet is p

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15

Weiland, Christopher. "Modification of Blade-Vortex Interactions Using Leading Edge Blowing." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/31723.

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The interaction of an unsteady wake with a solid body can induce sizable loading of the structure, which has many detrimental side effects in both the structural and acoustic senses. These interactions are ubiquitous in nature and engineering. A flow control technique is sought to mitigate this interaction, thereby decreasing the level of structural vibration. This thesis investigates the effectiveness of steady leading-edge blowing (LEB) flow control for modifying the vortex induced vibrations on an airfoil in the wake of a circular cylinder. The airfoil was allowed to oscillate perpendicu

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16

Fuller, Raymond Preston. "Fuel-vortex interactions for enhanced mixing in supersonic flow." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-154721/.

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17

Tang, Shiu-keung. "The aeroacoustics of free shear layers and vortex interactions /." [Hong Kong] : University of Hong Kong, 1992. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13311633.

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18

Edström, Alexander. "Non-Pairwise Vortex Interactions in Ginzburg-Landau Theory of Superconductivity." Thesis, KTH, Fysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95350.

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19

Roberts, Douglas A. "Experimental study of loadings during high-incidence airfoil-vortex interactions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0004/MQ42254.pdf.

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20

Vasudeo, Nikhil Baburam. "The Regime Diagram for Premixed Flame Kernel-Vortex Interactions - Revisited." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-10302009-145332/.

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Regimes of flame kernel-vortex (KV) interactions are investigated numerically using a detailed mechanism for hydrogen chemistry. The parametric simulations explore a wide range of conditions that are representative of conditions encountered at various degrees of turbulence intensity. The results show that KV interactions can be classified into five different regimes, which include 1) the laminar kernel regime, 2) the wrinkled kernel regime, 3) the breakthrough regime, 4) the global extinction regime, and 5) the regeneration after global extinction (RGE) regime. With the exception of the last r

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21

Maestri, Joseph. "Vortex-wave interactions and exact coherent structures in shear flows." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/51109.

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Recent studies of transition to turbulence in linearly stable shear flows have been dominated by finding, and characterising, so-called exact coherent structures which exist as either equilibrium or travelling wave solutions of the governing Navier-Stokes equations. These structures have been shown to act as either edge states between laminar and turbulent flow or become associated with attractors for turbulent flows, making the quest to understand these structures equally as mathematically interesting as it is industrially relevant. In this thesis, vortex-wave interaction theory, an asymptoti

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22

Barnes, Caleb J. "Unsteady Physics and Aeroelastic Response of Streamwise Vortex-Surface Interactions." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1431937866.

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23

鄭世有 and Sai-yau Vincent Cheng. "Interactions of flows over two unequal circular cylinders." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31236686.

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24

Cheng, Sai-yau Vincent. "Interactions of flows over two unequal circular cylinders /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19161402.

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25

Saunders, Daniel Curtis. "Wind Turbine Wake Interactions - Characterization of Unsteady Blade Forces and the Role of Wake Interactions in Power Variability Control." ScholarWorks @ UVM, 2017. http://scholarworks.uvm.edu/graddis/745.

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Growing concerns about the environmental impact of fossil fuel energy and improvements in both the cost and performance of wind turbine technologies has spurred a sharp expansion in wind energy generation. However, both the increasing size of wind farms and the increased contribution of wind energy to the overall electricity generation market has created new challenges. As wind farms grow in size and power density, the aerodynamic wake interactions that occur between neighboring turbines become increasingly important in characterizing the unsteady turbine loads and power output of the farm. Tu

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26

趙遠宏 and Yuen-wang Alex Chiu. "Near wake flow interactions of two square cylinders." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31238348.

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27

Chiu, Yuen-wang Alex. "Near wake flow interactions of two square cylinders /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20297099.

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28

Crocker, Elspeth Louise. "Vortex interactions and the significance of balance in two dimensional flows." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398292.

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29

Weiler, Justin D. "Numerical Simulation of Flame-Vortex Interactions in Natural and Synthetic Gas Mixtures." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4774.

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The interactions between laminar premixed flames and counter-rotating vortex pairs in natural and synthetic gas mixtures have been computationally investigated through the use of Direct Numerical Simulations and parallel processing. Using a computational model for premixed combustion, laminar flames are simulated for single- and two-component fuel mixtures of methane, carbon monoxide, and hydrogen. These laminar flames are forced to interact with superimposed laminar vortex pairs, which mimic the effects of a pulsed, two-dimensional slot-injection. The premixed flames are parameterized by t

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30

Ng, Chi-wing. "Interactions of vortices from two circular cylinders in bistable flow regime /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18037379.

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31

Michelin, Sébastien Honoré Roland. "Falling, flapping, flying, swimming,... high-Re fluid-solid interactions with vortex shedding /." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3369655.

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Thesis (Ph. D.)--University of California, San Diego, 2009.<br>Title from first page of PDF file (viewed September 17, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 200-210).

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32

Gsell, Simon. "Vortex-induced vibrations of a rigid circular cylinder." Phd thesis, Toulouse, INPT, 2016. http://oatao.univ-toulouse.fr/17430/1/gsell.pdf.

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When a flexible body with bluff cross-section is immersed in a flow, the unsteady fluid forces accompanying the vortex-shedding phenomenon may lead to structural vibrations. These vortexinduced vibrations (VIV) occur through a mechanism of synchronization between flow unsteadiness and body displacement, referred to as lock-in. VIV are detrimental to many industrial systems, but may also be used as mechanical energy converter in the context of flow energy harvesting. In the present work, the VIV of a rigid circular cylinder mounted on a elastic support are investigated in various configurations

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33

伍智榮 and Chi-wing Ng. "Interactions of vortices from two circular cylinders in bistable flow regime." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B3123608X.

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34

Bambrey, Ross R. "Strong interactions between two co-rotating vortices in rotating and stratified flows /." St Andrews, 2007. http://hdl.handle.net/10023/341.

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35

Sellin, Karl. "Phase transitions and vortex structures in multicomponent superconductors." Licentiate thesis, KTH, Statistisk fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177141.

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Theoretical aspects of multicomponent superconductivity and systemswith competing interactions are studied using Monte Carlo techniques.Motivated by recent experimental and theoretical results of complex struc-ture formation of vortices in multicomponent systems, possible vortex struc-ture formations due to vortex interactions that are not purely attractive orrepulsive are considered. Vortex structures such as clusters, superclusters,hierarchical structure formation, stripes, gossamer patters, glassy phases, aswell as checkerboard lattices and loops are demonstrated to be possible.The order of

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36

Patel, Rupa Ashyinkumar. "Theory and computation on nonlinear vortex/wave interactions in internal and external flows." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8597.

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37

Kolera-Gokula, Hemanth. "Numerical Investigation of the Mechanisms of Local Extinction Using Flame Kernel-Vortex interactions." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-07262006-192222/.

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The response of premixed flames to unsteady stretch is studied via kernel-vortex interactions. In this configuration a spark ignited kernel interacts with a vortex pair of variable strength. Both detailed and simple chemistry approaches are explored. In the detailed chemistry effort a dilute Hydrogen-air mixture is used. The vortex causes significant distortion of the kernel topography. Two distinct regimes; ?Breakthrough? and ?Extinction? are observed. A continuous increase in flame area and volumetric reaction rate values are observed throughout interactions in the breakthrough regime. Howev

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38

Morgan, Claire Elizabeth. "Unsteady vortex interactions related to a Formula One car front wing and wheel." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608608.

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39

Yemenici, Oznur. "Investigation Of Rotor Wake Interactions In Helicopters Using 3d Unsteady Free Vortex Wake Methodology." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611374/index.pdf.

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This thesis focuses on developing and examining the capabilities of a new in-house aerodynamic analysis tool, AeroSIM+, and investigating rotor-rotor aerodynamic interactions for two helicopters, one behind the other in forward flight. AeroSIM+ is a 3-D unsteady vortex panel method potential flow solver based on a free vortex wake methodology. Validation of the results with the experimental data is performed using the Caradonna-Tung hovering rotor test case. AeroSIM+ code is improved for forward flight conditions so that, the blades are allowed to move according to the rotor dynamics. In the s

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40

Moulin, Frédéric Y. "Interactions onde-vortex en milieu stratifié tournant et transport à travers une barrière dynamique." Université Joseph Fourier (Grenoble), 2002. http://www.theses.fr/2002GRE10156.

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41

Ghadimi, nassiri Mikaël. "Mise en forme topologique large-bande de la lumière." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0187/document.

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Aujourd'hui les outils permettant de moduler la phase d'une onde lumineuse sont nombreux etpour certains disponibles commercialement, seulement ces éléments ne fonctionnentgénéralement que pour une seule longueur d'onde de travail simultanément. Nous développonsplusieurs approches expérimentales pour la mise en forme de la phase de faisceaux à largebande spectrales. Après un état de l'art sur les principales techniques, nous focalisons notreétude sur la mise en forme de vortex optiques large-bande par l'intermédiaire d'élémentspermettant de moduler la phase géométrique, dont nous abordons quat

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42

Basu, Saikat. "Dynamics of vortices in complex wakes: modeling, analysis, and experiments." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/51749.

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The thesis develops singly-periodic mathematical models for complex laminar wakes which are formed behind vortex-shedding bluff bodies. These wake structures exhibit a variety of patterns as the bodies oscillate or are in close proximity of one another. The most well-known formation comprises two counter-rotating vortices in each shedding cycle and is popularly known as the vk vortex street. Of the more complex configurations, as a specific example, this thesis investigates one of the most commonly occurring wake arrangements, which consists of two pairs of vortices in each shedding period. Th

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43

Loyez, Marc Jason. "Free Lagrange simulations of flame/vortex interactions, including detailed finite rate chemical kinetics and heat release." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241965.

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44

Rajamani, Gokul Krishnan, and s3076297@student rmit edu au. "CFD analysis of air flow interactions in vehicle platoons." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061114.122130.

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The increasing use of Intelligent Transport System (ITS) can enable very close vehicle spacings which generally results in a net drag reduction for the resulting convoys. The majority of vehicle development has, to date, been for vehicles in isolation, thus the study of interaction effects is becoming increasingly important. The main objective of this research is to investigate the use of Computational Fluid Dynamics (CFD) for understanding convoy aerodynamics and to further the understanding of airflow interaction between vehicles via CFD. In this study, time-averaged characteri

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45

Bambrey, Ross R. "Strong interaction between two co-rotating vortices in rotating and stratified flows." Thesis, University of St Andrews, 2007. http://hdl.handle.net/10023/341.

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In this study we investigate the interactions between two co-rotating vortices. These vortices are subject to rapid rotation and stable stratification such as are found in planetary atmospheres and oceans. By conducting a large number of simulations of vortex interactions, we intend to provide an overview of the interactions that could occur in geophysical turbulence. We consider a wide parameter space covering the vortices height-to-width aspect-ratios, their volume ratios and the vertical offset between them. The vortices are initially separated in the horizontal so that they reside at an es

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46

Violette, Rémi. "Modèle linéaire des vibrations induites par vortex de structures élancées." Phd thesis, Ecole Polytechnique X, 2009. http://pastel.archives-ouvertes.fr/pastel-00005094.

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Les structures dites « offshores » vibrent sous l'effet des courants marins. Ces vibrations, induites par le détachement périodique de tourbillons dans le sillage de la structure (d'où le nom vibrations induites par vortex), endommagent par fatigue les câbles et les éléments de tuyauteries qui relient à la plateforme d'exploitation les têtes de puits de pétrole situés au niveau du sol marin. Une compréhension du comportement dynamique de ces structures sous l'effet du détachement tourbillonnaire est donc essentielle à l'étape de design. A l'intérieur de cette thèse, nous démontrons qu'en utili

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47

Geyman, Matthew Kenneth. "Wing/Wall Aerodynamic Interactions in Free Flying, Maneuvering MAVs." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1335113432.

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48

Belakroum, Rassim. "Contribution à la modélisation des interactions fluides-structures." Thesis, Reims, 2011. http://www.theses.fr/2011REIMS009/document.

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Les buts principaux recherchés de la présente thèse visent au développement et à l’expertise d’une méthodologie de simulation numérique des problèmes d’interactions fluides-structures. Afin de cerner progressivement le problème étudié, nous nous sommes intéressés en premier lieu à la simulation numérique des écoulements autour d’obstacles solides, plus particulièrement au phénomène d’éclatements tourbillonnaires dans la zone de sillage d’obstacles de différentes formes. Nous avons utilisé la méthode des éléments finis en adoptant la technique de stabilisation GLS (Galerkin Least-Square). Pour

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49

Mycek, Paul. "Etude numérique et expérimentale du comportement d'hydroliennes." Thesis, Le Havre, 2013. http://www.theses.fr/2013LEHA0010/document.

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$aCe manuscrit traite de la caractérisation numérique et expérimentale du comportement d’hydroliennes. D’un point de vue expérimental, des essais ont été réalisés au bassin à houle et courant de l’IFREMER de Boulogne-Sur-Mer, sur des maquettes d’hydroliennes tri-pales à axe horizontal. Des configurations comprenant une seule hydrolienne, d’une part, et deux hydroliennes alignées avec l’écoulement, d’autre part, ont été considérées pour une large gamme de TSR et, le cas échéant, de distances interhydroliennes. Le comportement des hydroliennes est analysé à la fois en termes de performances (coe

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50

Watterson, John Kenneth. "A new, pressure-based, unstructured mesh, Navier-Stokes solver and application to 3D compressible vortex/boundary layer interactions." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337910.

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