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Статті в журналах з теми "Couches de cisaillement turbulentes"
Leducq, D., and R. Perret. "Génération de vibrations par les couches limites turbulentes." La Houille Blanche, no. 3-4 (June 1988): 209–16. http://dx.doi.org/10.1051/lhb/1988016.
Повний текст джерелаSamb, Ndongo, Georges El-Saikaly, and Omar Chaallal. "Effet de la rigidité, du taux du polymère renforcé de fibres (PRF) et de l’armature transversale interne sur la contribution à la résistance à l’effort tranchant d’un renfort en PRF collé en surface : état de l’art et besoins en recherche." Canadian Journal of Civil Engineering 47, no. 11 (November 2020): 1276–96. http://dx.doi.org/10.1139/cjce-2019-0409.
Повний текст джерелаBalachandar, Ram, and Deighen Blakely. "Surface roughness effects on turbulent boundary layers on a flat plate located in an open channel / Effets de la rugosité de surface sur les couches limites turbulentes d'une plaque plane située dans un canal ouvert." Journal of Hydraulic Research 42, no. 3 (January 2004): 247–61. http://dx.doi.org/10.1080/00221686.2004.9641193.
Повний текст джерелаBouterra, Mourad, Afif El Cafsi, Ali Belghith, and Patrick Le Quéré. "Etude de l’effet d’une perturbation périodique sur la structure d’un écoulement turbulent stratifié autour d’un obstacle." Journal of Renewable Energies 12, no. 3 (October 26, 2023). http://dx.doi.org/10.54966/jreen.v12i3.147.
Повний текст джерелаДисертації з теми "Couches de cisaillement turbulentes"
Malecki, Pierre. "Étude de modèles de turbulence pour les couches limites tridimensionnelles." Toulouse, ENSAE, 1994. http://www.theses.fr/1994ESAE0013.
Повний текст джерелаMartin, Martin Laura. "Numerical study of sound scattering by isolated elliptic vortices and turbulent jet shear layers." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2024. http://www.theses.fr/2024ECDL0025.
Повний текст джерелаThis study is consecrated to the scattering of acoustic waves by isolated vortices and turbulent jet shear layers. When the acoustic waves pass through a volume of turbulence, the fluctuations in the turbulence change the propagation direction of the waves. In addition, if the turbulence evolves in time, there is also a change in the sound spectral content, causing spectral broadening. In order to better understand these phenomena, a series of numerical analyses have been carried out. For this purpose, a code provided by Siemens has been used where the Linearised Euler Equations are solved by the Discontinuous Galerkin method. It simulates the acoustic wave propagation over a base flow defined by the user. To take into account the spectral broadening, the code has been modified to be able to interpolate time-dependent external data in time and space onto the base flow. The interpolation has been tested by different convergence studies of the pressure field scattered by a 2-dimensional mixing layer. Other features have been also implemented to cope with the numerical instability waves caused by the inhomogeneity of the base flow. Initially, the scattering of acoustic waves caused by an isolated Kirchhoff elliptic vortex is investigated. When the vortex is fixed in space, the study focuses on the effects of the ellipticity, the orientation of the vortex regarding the direction of propagation of the incident acoustic wave, the tangential velocity of the vortex and its size regarding the acoustic waves. The scattering has been investigated also when the vortex is convected. Special attention has been devoted to its ellipticity and the velocity convection. The results show that the ellipticity and especially the orientation of the vortex play a key role in the scattering. Finally, the study of the scattering of sound by turbulent jet shear layers is conducted, where the acoustic source is located at the jet axis. For that, the data interpolated in the base flow of the DGM code belong to an external database of round jets simulated by LES. These jets have Mach numbers varying between 0.3 and 1.3, and their temperature is 1, 1.5 or 2.25 times the ambience temperature. These parameters modify the properties of the turbulent fluctuations. Therefore, the spectral content of these fluctuations is compared between the jets. After that, the pressure fields obtained with mean base flows and turbulent base flows, and the difference between them are presented. Their directivities are also discussed, as well as the spectra of the acoustic field. The spectra are characterized by a central tone at the source frequency and two lateral lobes. They are symmetric for high Mach numbers. The position of the lateral lobes shifts closer to the central tone and their levels increase with the jet temperature for jets with constant Mach number, which can be explained by the changes undergone by the turbulence fluctuations
Martinez, Ferrer Pedro José. "Simulation numérique directe dans la combustion turbulente sur une couche de cisaillement." Phd thesis, ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechique - Poitiers, 2013. http://tel.archives-ouvertes.fr/tel-00937313.
Повний текст джерелаBéharelle, Stéphane. "Influence du cisaillement transversal sur le développement d'une couche cisaillée libre turbulente incompressible." Poitiers, 1999. http://www.theses.fr/1999POIT2307.
Повний текст джерелаMrabet-Hanine, Faïza. "Physique, modélisation et simulation des couches limites turbulentes compressibles." Toulouse, INPT, 1992. http://www.theses.fr/1992INPT081H.
Повний текст джерелаBraud, Caroline. "Etude de la dynamique d'un écoulement à cisaillements croisés : interaction couche de mélange - sillage." Poitiers, 2003. https://tel.archives-ouvertes.fr/tel-00004751.
Повний текст джерелаThe aim of this study is to understand the dynamics of a complex flow: a mixing layer - wake interaction. This flow, 3D and inhomogeneous in all three directions, is first analyzed with hot wire and wall pressure measurements. From those data, the Reynolds number, the aspect ratio and the shear parameter influence have been analyzed on the Strouhal number, the base pressure coefficient and the vortex-formation length. In particular, analyses show that, above the impact area of the mixing layer (the low velocity side), the spectral analysis systematically shows at least two cells of different frequency. The main organization is then analyzed by means of PIV (Particle Image Velocimetry) and of POD (Proper Orthogonal Decomposition). First POD modes, which are representative of the energetically dominant coherent structures, clearly show the presence of oblique structures on each side of the mixing layer impact area. In the high velocity zone, where flow is three-dimensional, the higher POD modes show linkages of structures, longitudinal structures and dislocation of structures, close to those found at the time of the wake three-dimensionalisation (both by their intrinsic nature or by perturbations along the span of the cylinder). In addition, a LODS (Low Order Dynamical System) is constructed using a Galerkin projection in the plane behind the cylinder axis. The analysis reveals the existence of a low beating frequency of an injecting flow on the high velocity side. Lastly, low Reynolds number simulated data comfort experimental results on the characteristic behaviour for this flow configuration
Arzoumanian, Edouard. "Corrélations spatiotemporelles en couches limites turbulentes : cas d'une mobilité de la paroi." Aix-Marseille 2, 1987. http://www.theses.fr/1987AIX22058.
Повний текст джерелаQuine, Christian. "Etude expérimentale et numérique de couches de mélange turbulentes supersoniques et isobares." Aix-Marseille 2, 1990. http://www.theses.fr/1990AIX22081.
Повний текст джерелаArzoumanian, Edouard. "Corrélations spatiotemporelles en couches limites turbulentes cas d'une mobilité de la paroi /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37602405p.
Повний текст джерелаGratiot, Nicolas. "Étude expérimentale de la formation des couches de crême de vase turbulentes." Université Joseph Fourier (Grenoble ; 1971-2015), 2000. http://www.theses.fr/2000GRE10153.
Повний текст джерелаКниги з теми "Couches de cisaillement turbulentes"
Jean-Paul, Dussauge, Saric W. S, and North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel., eds. Turbulent boundary layers in subsonic and supersonic flow =: Les couches limites turbulentes dans les écoulements subsoniques et supersoniques. Neuilly-sur-Seine: AGARD, 1996.
Знайти повний текст джерелаТези доповідей конференцій з теми "Couches de cisaillement turbulentes"
Belkhir, Samir, Daniel Levacher, Walid Hamadeh, and Salim Mezazigh. "Modélisation numérique du comportement non-linéaire d'un pieu chargé latéralement avec prise en compte du cisaillement à l'interface des couches de sable." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 1998. http://dx.doi.org/10.5150/jngcgc.1998.043-b.
Повний текст джерела