Transactions of the ASME . Journal of fluids engineering, Vol. 130 N° 4. Journal of fluids engineering (Transactions of the ASME) - Avril 2008
| Titre : | Transactions of the ASME . Journal of fluids engineering, Vol. 130 N° 4. Journal of fluids engineering (Transactions of the ASME) - Avril 2008 |
| Type de document : | Bulletin |
| Paru le : | 29/09/2009 |
Dépouillements
Article : texte imprimé
Jesús Manuel Fernández Oro, Auteur ;
Rafael Ballesteros-Tajadura, Auteur ;
Eduardo Blanco Marigorta, Auteur
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This paper analyzes the structure of turbulence and secondary flows at the exit of an axial flow fan with variable pitch blades. The influence of changing the blades’ pitch angle over the turbulent structures is assessed by means of turbulence i[...]
Article : texte imprimé
Yantao Yang, Auteur ;
Hong Wu, Auteur ;
Qiushi Li, Auteur
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It is well recognized that vorticity and vortical structures appear inevitably in viscous compressor flows and have strong influence on the compressor performance. However, conventional analysis and design procedure cannot pinpoint the quantitat[...]
Article : texte imprimé
Yeng-Yung Tsui, Auteur ;
Yu-Chang Hu, Auteur
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The circulating flow in a vessel induced by rotating impellers has drawn a lot of interests in industries for mixing different fluids. It used to rely on experiments to correlate the performance with system parameters because of the theoretical [...]
Article : texte imprimé
Donald P. Rizzetta, Auteur ;
Miguel R. Visbal, Auteur
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Recent numerical simulations have indicated the potential of plasma-based active flow control for improving the efficiency of highly loaded low-pressure turbines. The configuration considered in the current and earlier simulations correspond to [...]
Article : texte imprimé
Peter Vassallo, Auteur ;
Paul Symolon, Auteur
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Friction factor data for adiabatic cross flow of water in a staggered tube array were obtained over a Reynolds number range (based on hydraulic diameter and gap velocity) of about 10,000–250,000. The tubes were 12.7mm(0.5in.) outer diameter in a[...]
Article : texte imprimé
Changkun Chen, Auteur ;
Nicolet, Christophe, Auteur ;
Koichi Yonezawa, Auteur
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One-dimensional stability analysis of a hydraulic system composed of a penstock, a runner, and a draft tube was carried out to determine the cause of the full load draft tube surge. It is assumed that the cavity volume at the runner exit is a fu[...]
Article : texte imprimé
Jiu-hong Jia, Auteur ;
Hong-xing Hua, Auteur
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The oscillating flow of the viscoelastic fluid in cylindrical pipes has been applied in many fields, such as industries of petroleum, chemistry, and bioengineering. It is studied using the fractional derivative Maxwell model in this paper. The e[...]
Article : texte imprimé
Noor Afzal, Auteur
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The present work deals with four new alternate transitional surface roughness scales for description of the turbulent boundary layer. The nondimensional roughness scale ϕ is associated with the transitional roughness wall inner variable ζ=Z+∕ϕ, [...]
Article : texte imprimé
V. A. Sandborn, Auteur
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At the location of intermittent turbulent boundary layer separation a finite positive mean surface shear stress still exists. It is demonstrated that viscous coordinates and a mixing length turbulent model may still be used at the location of in[...]
Article : texte imprimé
N. I. Hewedy, Auteur ;
Mofreh H. Hamed, Auteur ;
F. Sh. Abou-Taleb, Auteur
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The optimum geometries of the ejectors, which give maximum efficiency, are numerically predicted and experimentally measured. The numerical investigation is based on flow equations governing turbulent, compressible, two-dimensional, steady, time[...]
Article : texte imprimé
A. L. Kastengren, Auteur ;
C. F. Powell, Auteur ;
T. Riedel, Auteur
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X-ray radiography was used to measure the behavior of four fuel sprays from a light-duty common-rail diesel injector. The sprays were at 250bar injection pressure and 1bar ambient pressure. Injection durations of 400μs and 1000μs were tested, as[...]
Article : texte imprimé
Benoît Pouffary, Auteur ;
Regiane Fortes Patella, Auteur ;
Jean-Luc Reboud, Auteur
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The cavitation behavior of a four-blade rocket engine turbopump inducer was simulated by the computational fluid dynamics (CFD) code FINE∕TURBO ™. The code was modified to take into account a cavitation model based on a homogeneous approach of c[...]
Article : texte imprimé
Huseyin Akilli, Auteur ;
Cuma Karakus, Auteur ;
Atakan Akar, Auteur
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In the present work, passive control of vortex shedding behind a circular cylinder by splitter plates of various lengths attached on the cylinder base is experimentally investigated in shallow water flow. Detailed measurements of instantaneous a[...]
Article : texte imprimé
Jie Liu, Auteur ;
Walfre, Franco, Auteur ;
Guillermo Aguilar, Auteur
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Cryogen spray cooling is an auxiliary procedure to dermatologic laser surgery, which consists of precooling the superficial skin layer (epidermis) during laser irradiation of subsurface targets to avoid nonspecific epidermal thermal damage. Whil[...]
Article : texte imprimé
I. da S. Rêgo, Auteur ;
T. Ando, Auteur ;
K. Misumi, Auteur
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A double piston-actuated structure designed for replacing the use of diaphragms in conventional shock tubes has been recently developed. In order to clarify the piston sliding process for this structure, a simplified model based on the motion eq[...]
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