Publication result detail

Optimization of hydraulic turbine diffuser

MORAVEC, P.; HLINÍK, J.; RUDOLF, P.

Original Title

Optimization of hydraulic turbine diffuser

English Title

Optimization of hydraulic turbine diffuser

Type

Paper in proceedings (conference paper)

Original Abstract

Hydraulic turbine diffuser recovers pressure energy from residual kinetic energy on turbine runner outlet. Efficiency of this process is especially important for high specific speed turbines, where almost 50% of available head is utilized within diffuser. Magnitude of the coefficient of pressure recovery can be significantly influenced by designing its proper shape. Present paper focuses on mathematical shape optimization method coupled with CFD. First method is based on direct search Nelder-Mead algorithm, while the second method employs adjoint solver and morphing. Results obtained with both methods are discussed and their advantages/disadvantages summarized.

English abstract

Hydraulic turbine diffuser recovers pressure energy from residual kinetic energy on turbine runner outlet. Efficiency of this process is especially important for high specific speed turbines, where almost 50% of available head is utilized within diffuser. Magnitude of the coefficient of pressure recovery can be significantly influenced by designing its proper shape. Present paper focuses on mathematical shape optimization method coupled with CFD. First method is based on direct search Nelder-Mead algorithm, while the second method employs adjoint solver and morphing. Results obtained with both methods are discussed and their advantages/disadvantages summarized.

Keywords

Optimization; turbine diffuser; Nelder-Mead algorithm; adjoint solver

Key words in English

Optimization; turbine diffuser; Nelder-Mead algorithm; adjoint solver

Authors

MORAVEC, P.; HLINÍK, J.; RUDOLF, P.

RIV year

2017

Released

28.03.2016

Publisher

EDP Sciences

Book

EPJ Web of Conferences

ISBN

2100-014X

Periodical

EPJ Web of Conferences

Volume

114

Number

1

State

French Republic

Pages from

1

Pages to

7

Pages count

7

URL

https://www.epj-conferences.org/articles/epjconf/abs/2016/09/epjconf_efm2016_02079/epjconf_efm2016_02079.html

Full text in the Digital Library

http://hdl.handle.net/11012/204244

BibTex

@inproceedings{BUT120730,
  author="Prokop {Moravec} and Juraj {Hliník} and Pavel {Rudolf}",
  title="Optimization of hydraulic turbine diffuser",
  booktitle="EPJ Web of Conferences",
  year="2016",
  journal="EPJ Web of Conferences",
  volume="114",
  number="1",
  pages="1--7",
  publisher="EDP Sciences",
  doi="10.1051/epjconf/201611402079",
  issn="2100-014X",
  url="https://www.epj-conferences.org/articles/epjconf/abs/2016/09/epjconf_efm2016_02079/epjconf_efm2016_02079.html"
}

Documents

epjconf_efm2016_02079