TY - JOUR
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.
UR - http://www.scopus.com/inward/record.url?scp=84919478950&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84919478950&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/555/1/012077
DO - 10.1088/1742-6596/555/1/012077
M3 - Conference article
AN - SCOPUS:84919478950
VL - 555
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012077
T2 - 4th Scientific Conference on the Science of Making Torque from Wind
Y2 - 9 October 2012 through 11 October 2012
ER -