Evolution and breakdown of helical vortex wakes behind a wind turbine

A. Nemes; M. Sherry; D. Lo Jacono; H. M. Blackburn; J. Sheridan

doi:10.1088/1742-6596/555/1/012077

Evolution and breakdown of helical vortex wakes behind a wind turbine

A. Nemes, M. Sherry, D. Lo Jacono, H. M. Blackburn, J. Sheridan

Aerospace Engineering and Mechanics

Research output: Contribution to journal › Conference article › peer-review

8 Scopus citations

Abstract

The wake behind a three-bladed Glauert model rotor in a water channel was investigated. Planar particle image velocimetry was used to measure the velocity fields on the wake centre-line, with snapshots phase-locked to blade position of the rotor. Phase- locked averages of the velocity and vorticity fields are shown, with tip vortex interaction and entanglement of the helical filaments elucidated. Proper orthogonal decomposition and topology-based vortex identification are used to filter the PIV images for coherent structures and locate vortex cores. Application of these methods to the instantaneous data reveals unsteady behaviour of the helical filaments that is statistically quantifiable.

Original language	English (US)
Article number	012077
Journal	Journal of Physics: Conference Series
Volume	555
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/555/1/012077
State	Published - 2014
Event	4th Scientific Conference on the Science of Making Torque from Wind - Oldenburg, Germany Duration: Oct 9 2012 → Oct 11 2012

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Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

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title = "Evolution and breakdown of helical vortex wakes behind a wind turbine",

abstract = "The wake behind a three-bladed Glauert model rotor in a water channel was investigated. Planar particle image velocimetry was used to measure the velocity fields on the wake centre-line, with snapshots phase-locked to blade position of the rotor. Phase- locked averages of the velocity and vorticity fields are shown, with tip vortex interaction and entanglement of the helical filaments elucidated. Proper orthogonal decomposition and topology-based vortex identification are used to filter the PIV images for coherent structures and locate vortex cores. Application of these methods to the instantaneous data reveals unsteady behaviour of the helical filaments that is statistically quantifiable.",

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T1 - Evolution and breakdown of helical vortex wakes behind a wind turbine

AU - Nemes, A.

AU - Sherry, M.

AU - Lo Jacono, D.

AU - Blackburn, H. M.

AU - Sheridan, J.

N1 - Publisher Copyright: © Published under licence by IOP Publishing Ltd.

PY - 2014

Y1 - 2014

N2 - The wake behind a three-bladed Glauert model rotor in a water channel was investigated. Planar particle image velocimetry was used to measure the velocity fields on the wake centre-line, with snapshots phase-locked to blade position of the rotor. Phase- locked averages of the velocity and vorticity fields are shown, with tip vortex interaction and entanglement of the helical filaments elucidated. Proper orthogonal decomposition and topology-based vortex identification are used to filter the PIV images for coherent structures and locate vortex cores. Application of these methods to the instantaneous data reveals unsteady behaviour of the helical filaments that is statistically quantifiable.

AB - The wake behind a three-bladed Glauert model rotor in a water channel was investigated. Planar particle image velocimetry was used to measure the velocity fields on the wake centre-line, with snapshots phase-locked to blade position of the rotor. Phase- locked averages of the velocity and vorticity fields are shown, with tip vortex interaction and entanglement of the helical filaments elucidated. Proper orthogonal decomposition and topology-based vortex identification are used to filter the PIV images for coherent structures and locate vortex cores. Application of these methods to the instantaneous data reveals unsteady behaviour of the helical filaments that is statistically quantifiable.

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DO - 10.1088/1742-6596/555/1/012077

M3 - Conference article

AN - SCOPUS:84919478950

SN - 1742-6588

VL - 555

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

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T2 - 4th Scientific Conference on the Science of Making Torque from Wind

Y2 - 9 October 2012 through 11 October 2012

ER -

Evolution and breakdown of helical vortex wakes behind a wind turbine

Abstract

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