Transactions of the ASME . Journal of fluids engineering, Vol. 132 N° 7. Journal of fluids engineering (Transactions of the ASME) - Juillet 2010
| Titre : | Transactions of the ASME . Journal of fluids engineering, Vol. 132 N° 7. Journal of fluids engineering (Transactions of the ASME) - Juillet 2010 |
| Type de document : | Bulletin |
| Paru le : | 28/09/2010 |
Dépouillements
Article : texte imprimé
Junichi Kurokawa, Auteur ;
Hiroshi Imamura, Auteur ;
Young-Do Choi, Auteur
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The purpose of this study is to examine the validity of J-grooves in controlling and suppressing the swirl flow in a conical diffuser, for draft surge suppression in a Francis turbine, which is caused by the swirl flow from the runner outlet int[...]
Article : texte imprimé
Bingwei Song, Auteur ;
Hironori Horiguchi, Auteur ;
Zhenyue Ma, Auteur
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This paper addresses the rotordynamic instability of an overhung rotor caused by a hydrodynamic moment due to whirling motion through the structural coupling between whirl and precession modes. First, the possibility of instability is discussed [...]
Article : texte imprimé
Emin Issakhanian, Auteur ;
Chris J. Elkins, Auteur ;
Kin Pong Lo, Auteur
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The wake of the front tires affects the airflow over the remainder of a fenderless race car. The tires can also be responsible for up to 40% of the vehicle’s drag. Prior experiments have used compromised models with solid, symmetric hubs and non[...]
Article : texte imprimé
K. F. K. Adane, Auteur ;
M. F. Tachie, Auteur
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Three-dimensional laminar wall jet flows of shear-thinning non-Newtonian fluids have been studied using a particle image velocimetry technique. The non-Newtonian fluids were prepared from xanthan gum solutions of various concentrations. The velo[...]
Article : texte imprimé
Denis Lepchev, Auteur ;
Daniel Weihs, Auteur
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We study the creeping flow of an incompressible fluid in spiral microchannels such as that used in DNA identifying “lab-on-a-chip” installations. The equations of motion for incompressible, time-independent flow are developed in a three-dimensio[...]
Article : texte imprimé
Henrique Stel, Auteur ;
Rigoberto E. M. Morales, Auteur ;
Admilson T. Franco, Auteur
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This article describes a numerical and experimental investigation of turbulent flow in pipes with periodic “d-type” corrugations. Four geometric configurations of d-type corrugated surfaces with different groove heights and lengths are evaluated[...]
Article : texte imprimé
Afshin Goharzadeh, Auteur ;
Peter Rodgers, Auteur ;
Chokri Touati, Auteur
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This paper presents an experimental study of three-phase flows (air-water-sand) inside a horizontal pipe. The results obtained aim to enhance the fundamental understanding of sand transportation due to saltation in the presence of a gas-liquid t[...]
Article : texte imprimé
E. Sansone, Auteur ;
C. Pellone, Auteur ;
T. Maitre, Auteur
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The noncavitating and cavitating flows over a cross-flow water turbine are simulated by using an unsteady Navier–Stokes formulation. For the cavitating flow case, a homogeneous mixture with a varying density is considered and one additional tran[...]
Article : texte imprimé
Samy M. El-Behery, Auteur ;
Mofreh H. Hamed, Auteur ;
K. A. Ibrahim, Auteur
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This paper investigates numerically the erosion phenomenon that occurs in 90 deg and 180 deg curved ducts. The erosion prediction model comprises from three stages: flow modeling, particle tracking, and erosion calculations. The proposed three s[...]
Article : texte imprimé
A. R. Kabiri-Samani, Auteur ;
S. M. Borghei, Auteur
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The study of air-water, two-phase flows in hydraulic structures such as pressurized flow tunnels, culverts, sewer pipes, junctions, and similar conduits is of great importance for design purposes. Air can be provided by vortices at water intakes[...]
Article : texte imprimé
A. Abdel-Fattah, Auteur
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In the present, a steady laminar of two dimensional and incompressible fluid flow induces from wall injection in a circular chamber has been studied experimentally and numerically. The water is injected from injection system into the chamber thr[...]
Article : texte imprimé
Shu Wang, Auteur
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This paper discusses and analyzes the control volume of a piston bore constrained by the valve plate in axial piston pumps. The vacuum within the piston bore caused by the rise volume needs to be compensated by the flow; otherwise, the low press[...]
Article : texte imprimé
M. A. Hamdan, Auteur ;
M. A. Al-Nimr, Auteur ;
Vladimir A. Hammoudeh, Auteur
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In this work, the effect of the second-order term to the velocity-slip/temperature-jump boundary conditions on the solution of four cases in which the driving force is fluctuating harmonically was studied. The study aims to establish criteria th[...]
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