0
TECHNICAL PAPERS

Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—II: Addressing Passage-Averaged and Large-Eddy Simulation Modeling Issues in Turbomachinery Flows

[+] Author and Article Information
Manish Sinha, Joseph Katz, Charles Meneveau

Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD 21218

J. Fluids Eng 122(1), 108-116 (Nov 17, 1999) (9 pages) doi:10.1115/1.483232 History: Received January 08, 1999; Revised November 17, 1999
Copyright © 2000 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
The pump geometry. The blade tip in sample area is at 206 deg phase.
Grahic Jump Location
(a) Passage averaged velocity field in the stator reference frame. Contours represent velocity magnitude. (b) Distribution of deterministic kinetic energy, k*S det(x).
Grahic Jump Location
(right column) (a) An example of matched profiles acquired from phases 206 deg and 246 deg of the impeller. (b) Passage averaged velocity field in the impeller reference frame. For clarity we do not add Ωr to the circumferential velocity. Above the red dashed line all the data involves averaging of the same number of phase averaged distributions. (c) Distribution of deterministic kinetic energy, k*R det(x,t) (impeller reference frame).
Grahic Jump Location
Distribution of k*turb(x,t) at a phase of 226 deg
Grahic Jump Location
Distribution of deterministic shear stresses. The gray and white areas denote negative and positive shear stresses, respectively. The normalized deterministic shear stress (τ12det/ut2) contours are plotted in increments of 0.25×10−3.
Grahic Jump Location
Distribution of Reynolds shear stress based on phase averaging at 226 deg
Grahic Jump Location
Instantaneous distribution of SGS shear stress (τ12smag×103/Ut2) obtained from spatial filtering at scale=6.3 mm. The phase angle is 226 deg
Grahic Jump Location
Instantaneous distribution of SGS shear stress (τ12smag×103/Ut2) as predicted by the Smagorinsky model, for same filter scale and phase angle as Fig. 7
Grahic Jump Location
Filtered vorticity distribution of a single realization at same scale and phase angle as Fig. 7
Grahic Jump Location
Unfiltered vorticity distribution of same single realization as Figs. 7, 8, and 9
Grahic Jump Location
Filtered strain-rate distribution of same realization
Grahic Jump Location
Filtered strain-rate distribution of a different realization at phase angle of 226 deg
Grahic Jump Location
Distribution of SGS dissipation for a single realization at the same scale and phase as Fig. 7. The physical interpretation of this variable is as flux of kinetic energy from large to small scale (when positive). Negative regions denote backscatter.
Grahic Jump Location
Phase-averaged distribution of SGS dissipation at the same scale and phase as Fig. 13
Grahic Jump Location
Subgrid stresses (τ12), derived using a 12×12 filter on a 128×128 vector map for flow in a jet
Grahic Jump Location
Subgrid stresses (τ12), derived using a 3×3 filter on the prefiltered (4×4 filter) vector map. The computation is for the same realization of unfiltered velocity field as in Fig. 15.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In