Rozprawy doktorskie na temat „Canal hydraulique”
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Nehmé, Haissam. "Étude de l'ébullition dans un canal rectangulaire, inclinable, de grand diamètre hydraulique". Grenoble INPG, 1997. http://www.theses.fr/1997INPG0027.
Pełny tekst źródłaGuiot, Isabelle. "Première contribution à l'étude de la perturbation provoquée par une grille dans un canal de pisciculture". Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL137N.
Pełny tekst źródłaThis thesis is devoted to the preparation of the homogenization of a flow through a grid in an open channel ; it is particularly concerned with the influence of all the significant non dimensional numbers which occur in the problem : first of all the classical ones (Reynolds, Foude, Weber and Bond numbers) ; then, those obtained with the parameters linked to the grid (height, thickness, holes period and percentage). One chapter is based on simplified hypotheses (ideal fluid and continuous obstacle) ; it enables to focus on the effects of the Foude and Weber numbers, and of the obstacle height, on the shape of the free surface. The last two chapters consider the complete problem and try to determine the length of the perturbed zone (boundary layer thickness), and the free surface height around the obstacle (whiche has to be controled in order to avoid floodin)
Canivet, Eric. "Réconciliation et validation des mesures sur un système hydraulique complexe : le canal de Provence". Lyon 1, 2002. http://www.theses.fr/2002LYO10011.
Pełny tekst źródłaAmblard, Alain. "Comportement hydraulique et thermique d'un canal plan corrugué application aux échangeurs de chaleur à plaques". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375954351.
Pełny tekst źródłaGaudin, Alexandre. "Sociétés sous pression : une anthropologie historique d'un dispositif hydraulique intermédiaire : le cas du canal de Manosque (1990-2010)". Paris, EHESS, 2014. http://www.theses.fr/2014EHES0591.
Pełny tekst źródłaQuestioning the relatioship between social order and irrigation, this thesis explores the trajectory of an intermediary hydraulic apparatus that combines state and collective action: l'Association Syndicale du Canal de Manosque (france). This study investigates the controversies since the 1990s abiut the future of the irrigation canal that have involved engineers of a paragovernmental enterprise, state agents, elected representatives and members of the local population. It shows how interventions of these engineers around the canal generatepolitical tensions. They create a game of legal pluralism. They interfere with structural tensions between authorities about the definition of their field of action. They reconfigure dependencies among the local population about water and land access. They accompany the emergence of different negocoations arenas. The modernization of irrigation is thus a conflict-ridden process, which leads to the reconfiguration of hydraulic, juridical, social and public space. Whereas the paragovernmental enterprise put some of the water into market-based regulations, the activity of the association syndicale changesby organizing strategic actor's interests around the management of the externalities produced. This thesis proposes the development of an approach that tackles the internal and external relational aspects of hydraulic affairs as they come under state, industry, collective or individual action. It seeks to consider the limits between these different fields of social life as the outcome of a conflict-ridden and negotiated process
Quentin, Françoise. "Contrôle du mouvement de la houle dans un canal". Compiègne, 1992. http://www.theses.fr/1992COMPD547.
Pełny tekst źródłaNguyen, Thi-Le-Quyen. "Couplage VOF-LPT pour l'étude de l'érosion : application à l'affouillement autour des piles d'ouvrages maritimes". Electronic Thesis or Diss., Amiens, 2021. http://www.theses.fr/2021AMIE0062.
Pełny tekst źródłaStructures located in a fluvial and maritime environment undergo variable hydromechanical, physicochemical, and climatic stresses that possibly contribute to their possible deterioration. Bridge piers and offshore wind turbine foundations (monopile and suction monopod foundations) are examples of such structures. Among the resulting phenomena, local scour has been identified as one of the main phenomena resulting from the aforementioned conditions. In the United States, over the past 30 years, a thousand bridges have collapsed due to erosion-related failures. However, the factors causing this phenomenon remain a problem to be radically addressed. To numerically highlight the erosion processes mentioned above, a VOF-LTP (Volume Of Fluid - Lagrangian Particle Tracking) coupling was studied and integrated into the OpenFOAM code. The movement of particles in the LPT is governed by Newton's three laws while the movement of the fluid is locally based on the Navier-Stokes equation. The possibility of a collision between two particles is then estimated directly as a function of their positions and their relative velocity during a computational time step. The solid-fluid interaction is taken into account by the drag force and the pressure forces acting on the particles. The numerical results of dam break flows in a hydraulic channel were compared with experimental measurements of free surface profiles and flow velocities to validate the coupling between two fluid-air phases. Then, the hydrodynamics of the flow around a vertical cylinder on a semi-industrial scale was studied. In the presence of a solid phase, the trajectory and sedimentation velocity of a sphere as a function of time is compared with the experimental results obtained from the literature for different fluid viscosities. During the experimental campaign, several tests were carried out concerning the erosion of a granular bed downstream of a dam break. Three particle sizes were used to focus on the influence of the porosity of the granular bed on the depth of erosion. The numerical results have shown a good adequation with experimental results. Finally, to achieve a full-size simulation, multi-scale modelling of the scour around a vertical cylinder was carried out. The comparisons between the numerical results with the experimental data from the literature have enabled us to identify risk areas, to interpret the role of porosity, cohesion, and flow regimes
Debiane, Khaled. "Hydraulique des écoulements laminaires à surface libre dans un canal pour des milieux visqueux ou viscoplastiques : régimes uniforme, graduellement varié, et rupture de barrage". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10199.
Pełny tekst źródłaNEDELEC, Yves. "Interactions en crue entre drainage souterrain et assainissement agricole". Phd thesis, ENGREF (AgroParisTech), 2005. http://tel.archives-ouvertes.fr/tel-00009180.
Pełny tekst źródłaBouhadef, Malek. "Contribution à l'étude des ondes de surface dans un canal : application à l'écoulement au-dessus d'un obstacle immergé". Poitiers, 1988. http://www.theses.fr/1988POIT2008.
Pełny tekst źródłaLongchamp, Quentin. "Analyse expérimentale et numérique de l'écoulement dans le canal d'entrée d'un modèle de turbine bulbe". Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30591/30591.pdf.
Pełny tekst źródłaThis work is part of the research activities of the Hydraulic Machines Laboratory of the Laval University and its objective is to contribute to the characterisation of the intake flow in a model of a bulb turbine. The representation of the mean velocity fields and the turbulent fluctuations under predefined operating conditions were obtained by the use of a LDV measurement system. Mass-flow imbalance and vortices in the intake channel were identified. The conception of an obstacle geometry causing a non-uniformity in the intake channel has been developed taking in consideration the predictions of numerical simulation. Numerical simulations of the complete machine for both steady and unsteady case were performed with and without obstacle in the intake channel. The objective of this process was to evaluate the influence of the intake flow condition on the turbine performances. Moreover, comparisons between experimental and numerical quantities were made.
Lemay, Sébastien. "Étude expérimentale de l'écoulement dans le canal inter-aube d'une turbine de type bulbe". Master's thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/25156.
Pełny tekst źródłaCe mémoire présente l'étude expérimentale de l'écoulement dans le canal inter-aube d’une roue de turbine de type bulbe. Pour ce faire, deux campagnes de mesures ont été réalisées. La première a fait usage de l’anémométrie laser à effet Doppler (LDV). La seconde campagne a fait appel à l’anémométrie par image de particules (PIV) et à un montage stéréoscopique endoscopique conçu sur mesure pour atteindre la région ciblée. Les données recueillies permettent de caractériser plusieurs phénomènes. L’importance du sillage des directrices entre les aubes de la roue est mise en évidence par les deux techniques de mesure. La campagne de mesure par LDV permet plus spécifiquement de cibler les tourbillons de jeu de bout d’aube et d’identifier des débalancements fixe et rotatif. En complément, les mesures par PIV révèlent la présence d’un tourbillon qui provient du bord d’attaque près du moyeu lorsque la turbine opère à charge partielle.
This work presents the experimental study of the flow in the inter-blade channel of the runner of a bulb turbine. To do so, two measurement campaigns were carried out. The first used laser Doppler velocimetry (LDV). The second campaign used particle image velocimetry (PIV) and a custom designed stereoscopic endoscopic setup allowed reaching this otherwise difficult to access measurement plane. A comparison of the two sets of data collected indicates a good match over the entire area on which they overlap. The gathered data allows characterising many phenomena. The importance of the guide vanes wake on the runner flow is highlighted by both measurement techniques. The LDV measurement campaign allows characterizing the blade tip vortices and identifying fixed and rotary flow imbalances. In addition, the PIV measurements reveal the presence of a vortex that originates from the leading edge near the hub when the turbine operates at partial load.
Rolland, Romain. "Caractérisation de l'interaction fluide-structure d'un assemblage de coeur de réacteur sous forçage sismique". Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAE005.
Pełny tekst źródłaWithin the framework of safety studies, it is necessary to have validated models of the fluid forces exerted on fuel assemblies in the event of an earthquake. In the PWR (Pressurized Water Reactor) technology used in France, fuel assemblies are made of cylindrical rods bundles arranged in a square array and subjected to an axial flow. In case of an earthquake, these assemblies are subjected to lateral oscillations. These vibrations can lead to the deformation of the assemblies. Test campaigns on real fuel assemblies have been carried out and have revealed the existence of dissipative fluid forces whose evolution and spatial distribution are still poorly documented. The objective of the present work is to contribute to the description of these forces in dynamics. The reference model for the description of the dynamics of slender structures under axial flow is the TLP model (Taylor-Lighthill-Païdoussis). In the literature this model has been validated for a structure very close to the cylinder bundle. Static studies performed on a cylinder in a bundle have shown a non-negligible influence of the extremities on the forces exerted by the fluid on the structure. The literature proposes few validation cases of the TLP model for more complex structures close to a fuel assembly. In order to evaluate the capacity of the model to describe the fluid forces exerted on a structure closer to a fuel assembly, a new test bench was designed and put into service. This test rig allows to laterally oscillate a cylinder bundle 5 x 5 with grids at each end in an axial flow. Force measurements at each grid give access to the resultant force of the structure. A numerical model completes this experimental approach and gives access to the distribution of forces in the structure. The forces obtained experimentally seem to indicate an important effect of the grids. The forces obtained from the simulations confirm the observations made on a bundle of cylinders and bring new elements on the distribution of the local forces as well as the influence of the extremities
Dubois, Assia. "Ecoulements à surface libre de fluides à seuil : rhéométrie et validation des caractéristiques hydrauliques dans un canal à fond mobile. Application aux laves torrentielles". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00721734.
Pełny tekst źródłaGhemmour, Assia. "Ecoulements à surface libre de fluides à seuil : rhéométrie et validation des caractéristiques hydrauliques dans un canal à fond mobile. Application aux laves torrentielles". Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENI060/document.
Pełny tekst źródłaThis thesis presents an experimental study dedicated to characterise the hydraulic propertiesof free surface flows of complex fluids : viscoplastic fluids and mixtures made of viscoplasticfluids and grains. This study is motivated by the need to improve knowledge on properties ofthe flow of debris flows in a context of protection against natural hazards in the mountains.We have developed an original laboratory device - a channel with a mobile bottom - togenerate gravitary flows that are globally stationary in the laboratory frame. The flows have avery steep front followed upstream by a zone of uniform thickness. Viscoplastic fluids used(carbopol and kaolin) were selected so to model the matrix of natural mud flows, taking intoaccount the criteria of similarity adapted. These fluids follow a behavior law of Herschel-Bulkley, and their rheological properties were determined using a laboratory rheometer byproviding a particular care to the establishment of the associated uncertainties. We presentaccurate measurements of the evolution of the thickness of the flow in the uniform zone withthe the velocity speed of channel belt. These results are compared with theoretical predictionscorresponding to a steady uniform flow of a fluid of Herschel-Bulkley, and we show that theagreement is satisfactory through the uncertainties on the rheological measurements. We alsoanalyzed the shape of front, and here too, the agreement with hydraulic models (models likeSaint-Venant) is good. Both of the studies allowed to validate the hydraulic predictionsobtained from behavior laws measured with the rheometer. Finally, in a last section, wepresent a Preliminary study about the dynamics of isolated rigid particles placed in the flow,by paying attention to longitudinal velocities and falling velocities for different particle sizesand densities
Chen, Mei-Ling. "Commandes optimale et robuste des équations aux dérivées partielles régissant le comportement des systèmes hydrauliques à surface libre". Grenoble INPG, 2001. http://www.theses.fr/2001INPG0053.
Pełny tekst źródłaBeaulieu, Sébastien. "Étude expérimentale par la technique PIV de l'écoulement dans le canal inter-aube d'une turbine axiale de type hélice". Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27758/27758.pdf.
Pełny tekst źródłaRudi, Gabrielle. "Modélisation et analyse de services éco-hydrauliques des réseaux de canaux et fossés des agrosystèmes méditerranéens". Thesis, Montpellier, SupAgro, 2019. http://www.theses.fr/2019NSAM0007.
Pełny tekst źródłaAgroecological infrastructures are semi-natural landscape elements providing ecosystem services and disservices. In Mediterranean agrosystems, ditches and irrigation channels provide eco-hydraulic services relying on interactions between vegetation and water, sediments and plant propagules (seeds) transport. Management operations aiming at restoring the hydraulic capacity of these infrastructures are likely to modify the expression of these services. However, the interactions between practices, vegetation cover traits and ecosystem services provided by these infrastructures are still poorly characterized. The objective of this work was to understand in which extent ditch and channel management regimes, in terms of typology, but also in terms of temporality and location, influence eco-hydraulic services provided by vegetation.The approach relies on the development of a model proposing an explicit representation of the hydraulic network which functioning is simulated for reference events on the considered time horizon. The model is based on semi-empirical formalisms taking into account the effect of plant traits on transport processes, and especially their dynamical effect on hydraulic resistance. It was parameterized based on field experiments made in two Mediterranean agricultural study areas. These experiments aimed at : (i) characterizing the influence ofdifferent geomorphological factors and management regimes in the spatial distribution of ditch plant communities and their traits (ii) identifying the factors implied in the transport and deposition of propagules during an hydraulic event.The experimental results show that management regimes influence the dynamics of the vegetation cover at short-term, but that the spatial distribution of species (and therefore traits of the vegetation cover) is largely associated with geomorphological factors. They helped to improve our understanding of major key-processes of agricultural channel networks, especially propagules dispersal, and to propose a methodology for the relocation of the propagules in intermittent waterways. The spatialized model, integrating the main experimental results atthe catchment scale, enabled a ranking of the impact of practices regarding the bundle of services provided by agricultural ditches’ vegetation. Mowing provides the best trade-off between services in the short and medium term, although it is temporarily unfavourable for sediments and seeds retention, aswell as for bank stabilization, at the beginning of autumn. The developed semi-empirical approach gives the opportunity to question the level of description of processes and required indicators for services evaluation in complex ecosystems
Macia, Julie. "Identification et essais de techniques biochimiques de devitalisation sur des essences ligneuses générant des risques sur les ouvrages hydrauliques". Thesis, Avignon, 2018. http://www.theses.fr/2018AVIG0342.
Pełny tekst źródłaThe woody vegetation implanted on dikes and dams is well known for its many positive effects including bank stabilization, biodiversity, shade, etc. Thus, managers have left trees growing on these sites. But, recent studies show that trees and their root systems in particular may cause a range of damage such as uprising, cracking and deconstruction leading to internal risks and external erosion risks for hydraulic structures. A strengthening of the regulations for dikes and dams has obliged managers and owners to ensure the control, the technical monitoring and maintenance of their structures. However, regulations about use of plant protection products have also been reinforced, particularly with the ministerial ruling of 4 may 2017 (NOR : AGRG1632554A) forbidding the use of such products (including chemical herbicides) less than 5 m from bodies of water. These regulations in constant evolution forced a change in the usual practices thereby leaving managers confronted with an important problem of vegetation developing on their dikes and dams. Management plans must be elaborated in order to conciliate security, environmental and landscape issues. But traditional mechanical methods (logging, cutting and root extraction) are destructive for hydraulic structures and landscapes. It is urgent to set up preventive management techniques on young trees which potentially could constitute a risk when they grow.This thesis focuses on the search of alternative methods of devitalization of young trees generating risks on dikes and dams. The first part of research, divided in three Phases, consisted of screening and optimizing in greenhouse and field a range of possible and effective methods on the most predominant tree species found on hydraulic structures in France. The second part, also divided in three Phases, aimed to put in place a screening of selected methods on field test methods, and, at the same time, optimize methods according to specific parameters (trees shape, security of workers…). This second part, only conducted on black Poplars, has highlighted various constraint and revealed partially effective methods. The last Phase in field, realized only on black Poplars, has shown the effectiveness of three methods (mechanical wounding, mechanical wounding coupled with biochemical, mechanical wounding coupled with thermal) at six months after treatment. The trees treated in the field will be observed by ARBEAUSOLutions staff in 2018 to confirm the efficiency twelve months after treatment. In September 2017, two potential effective methods have been submitted for patent protection in order to enable further tests in situ and ensure protection of industrial property rights. The results of this research suggest that the effectiveness of strategies for devitalization depends on the intensity and timing of treatments to avoid that the tree responds by initiating resprouts and suckers for its survival