Extended Glauert Tip Correction to Include Vortex Rollup Effects

David Maniaci, Sven Schmitz

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Wind turbine loads predictions by blade-element momentum theory using the standard tip-loss correction have been shown to over-predict loading near the blade tip in comparison to experimental data. This over-prediction is theorized to be due to the assumption of light rotor loading, inherent in the standard tip-loss correction model of Glauert. A higher- order free-wake method, WindDVE, is used to compute the rollup process of the trailing vortex sheets downstream of wind turbine blades. Results obtained serve an exact correction function to the Glauert tip correction used in blade-element momentum methods. It is found that accounting for the effects of tip vortex rollup within the Glauert tip correction indeed results in improved prediction of blade tip loads computed by blade-element momentum methods.

Original languageEnglish (US)
Article number022051
JournalJournal of Physics: Conference Series
Volume753
Issue number2
DOIs
StatePublished - Oct 3 2016
EventScience of Making Torque from Wind, TORQUE 2016 - Munich, Germany
Duration: Oct 5 2016Oct 7 2016

Fingerprint

vortices
blades
blade tips
wind turbines
predictions
momentum theory
vortex sheets
momentum
turbine blades
wakes
rotors

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Extended Glauert Tip Correction to Include Vortex Rollup Effects",
abstract = "Wind turbine loads predictions by blade-element momentum theory using the standard tip-loss correction have been shown to over-predict loading near the blade tip in comparison to experimental data. This over-prediction is theorized to be due to the assumption of light rotor loading, inherent in the standard tip-loss correction model of Glauert. A higher- order free-wake method, WindDVE, is used to compute the rollup process of the trailing vortex sheets downstream of wind turbine blades. Results obtained serve an exact correction function to the Glauert tip correction used in blade-element momentum methods. It is found that accounting for the effects of tip vortex rollup within the Glauert tip correction indeed results in improved prediction of blade tip loads computed by blade-element momentum methods.",
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Extended Glauert Tip Correction to Include Vortex Rollup Effects. / Maniaci, David; Schmitz, Sven.

In: Journal of Physics: Conference Series, Vol. 753, No. 2, 022051, 03.10.2016.

Research output: Contribution to journalConference article

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T1 - Extended Glauert Tip Correction to Include Vortex Rollup Effects

AU - Maniaci, David

AU - Schmitz, Sven

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N2 - Wind turbine loads predictions by blade-element momentum theory using the standard tip-loss correction have been shown to over-predict loading near the blade tip in comparison to experimental data. This over-prediction is theorized to be due to the assumption of light rotor loading, inherent in the standard tip-loss correction model of Glauert. A higher- order free-wake method, WindDVE, is used to compute the rollup process of the trailing vortex sheets downstream of wind turbine blades. Results obtained serve an exact correction function to the Glauert tip correction used in blade-element momentum methods. It is found that accounting for the effects of tip vortex rollup within the Glauert tip correction indeed results in improved prediction of blade tip loads computed by blade-element momentum methods.

AB - Wind turbine loads predictions by blade-element momentum theory using the standard tip-loss correction have been shown to over-predict loading near the blade tip in comparison to experimental data. This over-prediction is theorized to be due to the assumption of light rotor loading, inherent in the standard tip-loss correction model of Glauert. A higher- order free-wake method, WindDVE, is used to compute the rollup process of the trailing vortex sheets downstream of wind turbine blades. Results obtained serve an exact correction function to the Glauert tip correction used in blade-element momentum methods. It is found that accounting for the effects of tip vortex rollup within the Glauert tip correction indeed results in improved prediction of blade tip loads computed by blade-element momentum methods.

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