Detail publikace

Development of high specific speed Francis turbine for low head HPP

KRAUSOVÁ, H. OBROVSKÝ, J. ŠPIDLA, J. ZOUHAR, J.

Originální název

Development of high specific speed Francis turbine for low head HPP

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Nowadays we can commonly encounter with revitalizations of an original HPPs which were earlier fitted with Francis turbines. They were often placed to the locations with low head and higher discharge which means high specific speed (ns > 400). Generally it is quite complex to design Francis turbines for such high specific speed. These very old turbines usually have lower efficiency due to the earlier limited possibilities of hydraulic design. An exchange of a water turbine with another type can be quite expensive and therefore it can be more suitable to change only an old runner for a new one. In this article the design process of high specific speed turbine ns = 430 is described. Optimization was done as the full-automatic cycle and was based on a simplex optimization method as well as on a genetic algorithm. For the parameterization of the runner blade, the BladeGen software was used and CFD (Computational Fluid Dynamics) analysis was run in Ansys CFX v.14 software. The final shape of the runner blade was reached after computing about 1000 variants which lasted about 250 computational hours.

Klíčová slova

Francis turbine, high specific speed, CFD, optimization method, objective function

Autoři

KRAUSOVÁ, H.; OBROVSKÝ, J.; ŠPIDLA, J.; ZOUHAR, J.

Rok RIV

2013

Vydáno

6. 12. 2013

Nakladatel

Association for Engineering Mechanics

Místo

Praha

ISSN

1802-1484

Periodikum

Engineering Mechanics

Ročník

20

Číslo

2

Stát

Česká republika

Strany od

139

Strany do

148

Strany počet

10

BibTex

@article{BUT100654,
  author="Hana {Krausová} and Jiří {Obrovský} and Jiří {Špidla} and Josef {Zouhar}",
  title="Development of high specific speed Francis turbine for low head HPP",
  journal="Engineering Mechanics",
  year="2013",
  volume="20",
  number="2",
  pages="139--148",
  issn="1802-1484"
}