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"
}