Detail publikačního výsledku

Comparison of two methods of mathematical modeling in hydrodynamic sealing gap

KRUTIL, J.; FOJTÁŠEK, K.; DVOŘÁK, L.

Originální název

Comparison of two methods of mathematical modeling in hydrodynamic sealing gap

Anglický název

Comparison of two methods of mathematical modeling in hydrodynamic sealing gap

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

The aim of work is to compare two possible methods of mathematical modeling of hydrodynamic instabilities. This comparison is performed by monitoring the formation and evolution of Taylor vortices in hydrodynamic sealing gap. Sealing gaps are a part of the hydraulic machines with the impeller, such as turbines and pumps, and they have an effect on the volumetric efficiency of these devices. This work presents two examples of sealing gaps. These examples are closed sealing gap and modified sealing gap with expansion chamber. On these two examples are applied procedures of solution contained in CFD software (ANSYS Fluent 14.5). In ANSYS Fluent is two possible basic approaches of solution this task: the moving wall method and the sliding mesh method. The result of work is monitoring the impact of the expansion chamber on the formation of hydrodynamic instabilities in the sealing gap. Another result is comparison of two used methods of mathematical modeling, which shows that both methods can be used for similar tasks.

Anglický abstrakt

The aim of work is to compare two possible methods of mathematical modeling of hydrodynamic instabilities. This comparison is performed by monitoring the formation and evolution of Taylor vortices in hydrodynamic sealing gap. Sealing gaps are a part of the hydraulic machines with the impeller, such as turbines and pumps, and they have an effect on the volumetric efficiency of these devices. This work presents two examples of sealing gaps. These examples are closed sealing gap and modified sealing gap with expansion chamber. On these two examples are applied procedures of solution contained in CFD software (ANSYS Fluent 14.5). In ANSYS Fluent is two possible basic approaches of solution this task: the moving wall method and the sliding mesh method. The result of work is monitoring the impact of the expansion chamber on the formation of hydrodynamic instabilities in the sealing gap. Another result is comparison of two used methods of mathematical modeling, which shows that both methods can be used for similar tasks.

Klíčová slova

Mathematical modeling, CFD, sealing gap, flow.

Klíčová slova v angličtině

Mathematical modeling, CFD, sealing gap, flow.

Autoři

KRUTIL, J.; FOJTÁŠEK, K.; DVOŘÁK, L.

Rok RIV

2016

Vydáno

06.05.2015

Nakladatel

EDP Sciences

Kniha

EPJ Web of Conferences. Volume 92

ISSN

2100-014X

Periodikum

EPJ Web of Conferences

Svazek

92

Číslo

5

Stát

Francouzská republika

Strany od

305

Strany do

312

Strany počet

8

URL

https://www.epj-conferences.org/articles/epjconf/abs/2015/11/epjconf_efm2014_02040/epjconf_efm2014_02040.html

Plný text v Digitální knihovně

http://hdl.handle.net/11012/201336

BibTex

@inproceedings{BUT114522,
  author="Jaroslav {Krutil} and Kamil {Fojtášek} and Lukáš {Dvořák}",
  title="Comparison of two methods of mathematical modeling in hydrodynamic sealing gap",
  booktitle="EPJ Web of Conferences. Volume 92",
  year="2015",
  journal="EPJ Web of Conferences",
  volume="92",
  number="5",
  pages="305--312",
  publisher="EDP Sciences",
  doi="10.1051/epjconf/20159202040",
  issn="2100-014X",
  url="https://www.epj-conferences.org/articles/epjconf/abs/2015/11/epjconf_efm2014_02040/epjconf_efm2014_02040.html"
}

Dokumenty

epjconf_efm2014_02040