Three-bladed horizontal axis water turbine simulations with free surface effects

• Autorzy: Rodríguez L. , Benavides-Moran A. , Laín S.

Identyfikatory

DOI

10.2478/ijame-2021-0044

• Języki publikacji: EN

Abstrakty

EN

The water level above a hydrokinetic turbine is likely to vary throughout the season and even along the day. In this work, the influence of the free surface on the performance of a three bladed horizontal-axis turbine is explored by means of a three-dimensional, transient, two-phase flow computational model implemented in the commercial CFD software ANSYS Fluent 19.0. The [...] Transition turbulence model coupled with the Volume of Fluid (VOF) method is used to track the air-water interface. The rotor diameter is [...]. Two operating conditions are analyzed: deep tip immersion (0.55D) and shallow tip immersion (0.19D). Three tip speed ratios are evaluated for each immersion. Simulation results show a good agreement with experimental data reported in the literature, although the computed torque and thrust coefficients are slightly underestimated. Details of the free surface dynamics, the flow past the turbine and the wake near the rotor are also discussed.

Słowa kluczowe

EN

hydrokinetic turbine; VOF; sliding mesh; torque coefficient

PL

moment obrotowy; turbina hydrokinetyczna; przepływ cieczy

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2021
• Tom: Vol. 26, no. 3
• Strony: 187--197
• Opis fizyczny: Bibliogr. 27 poz., rys., tab., wykr.

Twórcy

autor

Rodríguez L.

• Department of Mechanical and Mechatronics Engineering, Universidad Nacional de Colombia Sede Bogota, COLOMBIA

autor

Benavides-Moran A.

• Department of Mechanical and Mechatronics Engineering, Universidad Nacional de Colombia Sede Bogota, COLOMBIA

autor

Laín S.

• PAI+Research Group, Department of Energy and Mechanics, Universidad Autónoma de Occidente Cali, COLOMBIA

Bibliografia

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