Computational Fluid Dynamics (CFD) for turbines

Design of the hydraulics for a Kaplan residual water turbine

Design of the hydraulics for a Kaplan residual water turbine

  • maximum flow QMax=1.5m³/s
  • minimum flow QMin=0.8m³/s
  • specific speed nq=300U/min
  • diameter D=0.65m
  • 7-pole generator

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Numerische Simulation der Einlaufstruktur, Leitapparat sowie Geschwindigkeitsvektoren einer Kaplan-Turbine

Numerische Simulation Einlaufstruktur Kaplan-Z-Turbine

  • Fallhöhe Hmax = 22,50 m
  • Max. Durchfluss  Qmax = 14 m³
  • Drehzahl n = 375 rpm
  • Ziel: Optimierung Strömungsverluste und Kraftfluktuationen im Bereich der Leitbleche/Maschinenwelle

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CFD calculations for a hydro power plant

CFD calculations for a hydro power plant

3 parallel EOS-700 bulb turbines (with one fixed and one variable blade position, nominal diameter 700 mm)

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Development of new turbine hydraulics for a hydro power plant

Development of new turbine hydraulics for a hydro power plant

Based on the calculation results of the project “CFD calculations for a hydro power plant” new, semi-regulated Kaplan turbine hydraulics for an EOS-700 turbine were developed.

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Development of hydraulics for a vertical Kaplan turbine

Development of hydraulics for a vertical Kaplan turbine

  • maximum flow Qmax = 16 m³/s
  • nominal head Hdesign = 3 m
  • nominal speed n = 115 U/min

 

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Development of hydraulics for a Francis turbine with nq=66

Development of hydraulics for a Francis turbine with nq=66

  • The runner hydraulics is based on approaches determined by SIERVO and THOMANN.
  • The blade profiles base on the 4-digit NACA profile NACA-0006.
  • Comparison of the efficiencies of different runner blades.

 

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Redesign of hydraulics for a Kaplan turbine

Redesign of hydraulics for a Kaplan turbine

  • Basic design, one-dimensional, on 6 partial flow turbine wheels
  • Starting geometry defined by means of the Scholz-Czibere procedure
  • Definition of blade and profile length by means of Thomann`s references

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Pelton distribution pipeline

Pelton turbine: distribution pipeline & cup geometry

  • Geometry development
  • Optimisation cup geometry
  • Optimisation of jet quality

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