An analysis of the vortex dynamics in the wake of three different freestream turbine concepts is conducted to gain a better understanding of the main processes affecting the energy recovery in their wakes. The turbine technologies considered are the axial-flow turbine (AFT), the crossflow turbine (CFT), also known as the H-Darrieus turbine, and the oscillating-foil turbine (OFT). The analysis is performed on single turbines facing a uniform oncoming flow and operating near their optimal efficiency conditions at a Reynolds number of 107. Three-dimensional (3D) delayed detached-eddy simulations (DDES) are carried out using a commercial finite volume Navier–Stokes solver. It is found that the wake dynamics of the AFT is significantly affected by the triggering of an instability, while that of the CFT and the OFT are mainly governed by the mean flow field stemming from the tip vortices' induction.
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February 2018
Research-Article
Vortex Dynamics in the Wake of Three Generic Types of Freestream Turbines
Matthieu Boudreau,
Matthieu Boudreau
Laboratoire de Mécanique des
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC G1V 0A6, Canada
e-mail: matthieu.boudreau.1@ulaval.ca
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC G1V 0A6, Canada
e-mail: matthieu.boudreau.1@ulaval.ca
Search for other works by this author on:
Guy Dumas
Guy Dumas
Laboratoire de Mécanique des
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC, G1V 0A6, Canada
e-mail: gdumas@gmc.ulaval.ca
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC, G1V 0A6, Canada
e-mail: gdumas@gmc.ulaval.ca
Search for other works by this author on:
Matthieu Boudreau
Laboratoire de Mécanique des
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC G1V 0A6, Canada
e-mail: matthieu.boudreau.1@ulaval.ca
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC G1V 0A6, Canada
e-mail: matthieu.boudreau.1@ulaval.ca
Guy Dumas
Laboratoire de Mécanique des
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC, G1V 0A6, Canada
e-mail: gdumas@gmc.ulaval.ca
Fluides Numérique,
Department of Mechanical Engineering,
Laval University,
Quebec City, QC, G1V 0A6, Canada
e-mail: gdumas@gmc.ulaval.ca
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received July 21, 2016; final manuscript received August 14, 2017; published online October 24, 2017. Assoc. Editor: Olivier Coutier-Delgosha.
J. Fluids Eng. Feb 2018, 140(2): 021106 (9 pages)
Published Online: October 24, 2017
Article history
Received:
July 21, 2016
Revised:
August 14, 2017
Citation
Boudreau, M., and Dumas, G. (October 24, 2017). "Vortex Dynamics in the Wake of Three Generic Types of Freestream Turbines." ASME. J. Fluids Eng. February 2018; 140(2): 021106. https://doi.org/10.1115/1.4037974
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