izpis_h1_title_alt

Hitrostno polje vodnega toka v območju bočnega preliva : doktorska disertacija
Novak, Gorazd (Author), Steinman, Franci (Mentor) More about this mentor... This link opens in a new window, Bajcar, Tom (Co-mentor), Mikoš, Matjaž (Thesis defence commission member), Kompare, Boris (Thesis defence commission member), Širok, Brane (Thesis defence commission member), Klasinc, Roman (Thesis defence commission member)

URLURL - Presentation file, Visit http://drugg.fgg.uni-lj.si/3829/ This link opens in a new window
.pdfPDF - Presentation file, Download (5,61 MB)

Abstract
Disertacija obravnava hitrostno polje vodnega toka v območju ostrorobih pravokotnih bočnih prelivov in koeficient pretoka teh prelivov za mirni režim toka. Poudarek je na rezultatih eksperimentov, izvedenih na različnih fizičnih hidravličnih modelih. Uporabljena je vizualizacijska metoda, ki v nasprotju z ustaljenimi pristopi, omogoča neinvazivno kvantifikacijo hitrostnih polj. Le-ta so izmerjena v posameznih horizontalnih ravninah obravnavanega vodnega toka. Določitev vektorskega polja hitrosti temelji na analizi posnetkov premikanja v tok vnesenega polutanta, tj. delcev, barvila, ali z elektrolizo generiranih vodikovih mehurčkov. Metoda omogoča numerični izračun komponent vektorjev hitrosti z veliko prostorsko in časovno ločljivostjo. Rezultati meritev dajejo nov, podrobnejši vpogled v kompleksnost vodnega toka v območju bočnega preliva in v nasprotju z eno od predpostavk energijskega pristopa kažejo na izrazito neenakomerno porazdelitev obravnavanih hitrosti vzdolž toka. Rezultati so primerjani z že objavljenimi raziskavami. Prispevek k znanosti predstavlja tudi nova, fenomenološka enačba za koeficient pretoka bočnega preliva, oblikovana na podlagi dimenzijske analize in potenčnega nastavka. Tako formulirana enačba je preprosta za uporabo in veljavna za dokaj širok razpon brezdimenzijskih parametrov, ki podajajo glavne geometrijske in hidravlične značilnosti toka preko bočnih prelivov.

Language:Slovenian
Keywords:gradbeništvo, disertacije, bočni preliv, vizualizacijska metoda, hitrostno polje, pretočni koeficient, hidravlični model
Work type:Dissertation (m)
Tipology:2.08 - Doctoral Dissertation
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2012
Publisher:[G. Novak]
Number of pages:XIII, 100 str., [34] str. pril.
Place:Ljubljana
UDC:519.61/.64:532.5:627.1(043.3)
COBISS.SI-ID:5862497 Link is opened in a new window
Views:2113
Downloads:293
Metadata:XML RDF-CHPDL DC-XML DC-RDF
 
Average score:(0 votes)
Your score:Voting is allowed only to logged in users.
:
Share:AddThis
AddThis uses cookies that require your consent. Edit consent...

Secondary language

Language:English
Title:Velocity field of water flow at side weir
Abstract:
Doctoral dissertation considers velocity field of water flow at sharp-crested rectangular side weirs and their discharge coefficients for subcritical flow. This work focuses on experimental results, obtained at various physical hydraulic models. A visualization method is employed, which - in contrast to more common approaches - allows non-invasive quantification of velocity fields. These are measured in separate horizontal planes of observed flow. Determination of vector field of velocities is based on the analysis of films displaying the movement of inserted pollutant, e.i. particles, dye or electrolysis-generated hydrogen bubbles. The method allows numerical calculation of components of velocity vectors with great spatial and time resolution. Results of measurements provide a new, more detailed insight into complexity of water flow at side weir, and - in contrast to one of the energy-approach assumptions - indicate the distinctively non-uniform distribution of considered velocities along the flow. Results are compared with published studies. As an additional contribution to science a new, phenomenological equation for a side weir discharge coefficient has been formulated on the basis of dimensional analysis and a power-law formulation. This equation is simple to use and is valid for fairly wide range of dimensionless parameters that give main geometrical and hydraulic characteristics of flow over side weirs.

Keywords:side weir, visualization method, velocity field, discharge coefficient, hydraulic model

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back