Publication detail

Optimization of hydraulic turbine diffuser

MORAVEC, P. HLINÍK, J. RUDOLF, P.

Czech title

Optimalizace difuzoru turbíny

English title

Optimization of hydraulic turbine diffuser

Type

conference paper

Language

en

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.

Czech abstract

Článek je zaměřen na matematické tvarové optimalizační metody spjaté s CFD

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 in Czech

Optimalizace; difuzor; Nelder-Mead algoritmus; adjoint solver

Keywords in English

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

Released

28.03.2016

Publisher

EDP Sciences

ISSN

2100-014X

Book

EPJ Web of Conferences

Volume

114

Number

1

Pages from–to

1–7

Pages count

7

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",
  volume="114",
  number="1",
  month="March",
  pages="1--7",
  publisher="EDP Sciences",
  issn="2100-014X"
}