Publication detail

Comparison of two methods of mathematical modeling in hydrodynamic sealing gap

KRUTIL, J. FOJTÁŠEK, K. DVOŘÁK, L.

Original Title

Comparison of two methods of mathematical modeling in hydrodynamic sealing gap

Type

conference paper

Language

English

Original Abstract

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.

Keywords

Mathematical modeling, CFD, sealing gap, flow.

Authors

KRUTIL, J.; FOJTÁŠEK, K.; DVOŘÁK, L.

RIV year

2015

Released

6. 5. 2015

Publisher

EDP Sciences

ISBN

2100-014X

Periodical

EPJ Web of Conferences

Year of study

92

Number

5

State

French Republic

Pages from

305

Pages to

312

Pages count

8

URL

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

Full text in the Digital Library

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"
}