Reduced order model of draft tube flow

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F14%3APU111794" target="_blank" >RIV/00216305:26210/14:PU111794 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1755-1315/22/2/022022" target="_blank" >http://dx.doi.org/10.1088/1755-1315/22/2/022022</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1755-1315/22/2/022022" target="_blank" >10.1088/1755-1315/22/2/022022</a>

Result language
angličtina
Original language name
Reduced order model of draft tube flow
Original language description
Swirling flow with compact coherent structures is very good candidate for proper orthogonal decomposition (POD), i.e. for decomposition into eigenmodes, which are the cornerstones of the flow field. Present paper focuses on POD of steady flows, which correspond to different operating points of Francis turbine draft tube flow. Set of eigenmodes is built using a limited number of snapshots from computational simulations. Resulting reduced order model (ROM) describes whole operating range of the draft tube. ROM enables to interpolate in between the operating points exploiting the knowledge about significance of particular eigenmodes and thus reconstruct the velocity field in any operating point within the given range. Practical example, which employs axisymmetric simulations of the draft tube flow, illustrates accuracy of ROM in regions without vortex breakdown together with need for higher resolution of the snapshot database close to location of sudden flow changes (e.g. vortex breakdown). ROM based on POD interpolation is very suitable tool for insight into flow physics of the draft tube flows (especially energy transfers in between different operating points), for supply of data for subsequent stability analysis or as an initialization database for advanced flow simulations.
Czech name
—
Czech description
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
IOP Conference Series-Earth and Environmental Science
ISBN
—
ISSN
1755-1315
e-ISSN
—
Number of pages
10
Pages from-to
1-10
Publisher name
IOP Science
Place of publication
Neuveden
Event location
Montreal
Event date
Sep 22, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000347441900056

Similar results(10)