Vol. 18 No. 3 (2019): Revista UIS Ingenierías
Articles

Numerical investigation on the use of multi-element blades in horizontal axis hydrokinetic turbine

Edwin Chica-Arrieta
Universidad de Antioquia
Jonathan Aguilar-Bedoya
Universidad de Antioquia
Ainhoa Rubio-Clemente
Tecnológico de Antioquia Institución Universitaria TdeA

Published 2019-04-30

Keywords

  • multi-element blade,
  • horizontal axis hydrokinetic turbine,
  • hydrodynamic analysis,
  • chord length,
  • JavaFoil

How to Cite

Chica-Arrieta, E., Aguilar-Bedoya, J., & Rubio-Clemente, A. (2019). Numerical investigation on the use of multi-element blades in horizontal axis hydrokinetic turbine. Revista UIS Ingenierías, 18(3), 117–128. https://doi.org/10.18273/revuin.v18n3-2019012

Abstract

This paper presents the sizing of the blades of a 1 kW hydrokinetic turbine with 3 blades with hydrodynamic multi-element profiles using the Blade Element Momentum theory (BEM). The hydrodynamic profile used was the Eppler 420. The turbine was designed from a water flow velocity of 1.5 m/s with a tip speed ratio of the blade (λ) of 6.325, a pitch angle of the blade section (θ) of 0°, a power coefficient of 0.4382 and a mechanical efficiency of 70%. The Eppler 420 multi-element profile was selected for the design of the blade because it has a high ratio between the lift coefficient and the drag. A 2D computation study in the JavaFoil code of the Eppler 420 profile was carried out in order to determine the optimal lengths of the main element and the optimal flap for a deflection angle of 30° under conditions of a low Reynolds number.

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