Detail publikace
Srovnání dvou metod matematického modelování v hydrodynamického těsnicí spáře
KRUTIL, J. FOJTÁŠEK, K. DVOŘÁK, L.
Český název
Srovnání dvou metod matematického modelování v hydrodynamického těsnicí spáře
Anglický název
Comparison of two methods of mathematical modeling in hydrodynamic sealing gap
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
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 anglicky
Mathematical modeling, CFD, sealing gap, flow.
Rok RIV
2015
Vydáno
06.05.2015
Nakladatel
EDP Sciences
ISSN
2100-014X
Kniha
EPJ Web of Conferences. Volume 92
Ročník
92
Číslo
5
Strany od–do
305–312
Počet stran
8
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",
volume="92",
number="5",
month="May",
pages="305--312",
publisher="EDP Sciences",
issn="2100-014X"
}