Brief communication: Wind inflow observation from load harmonics-wind tunnel validation of the rotationally symmetric formulation

Marta Bertelè, Carlo L. Bottasso, Stefano Cacciola

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The present paper further develops and experimentally validates the previously published idea of estimating the wind inflow at a turbine rotor disk from the machine response. A linear model is formulated that relates one per revolution (1P) harmonics of the in- and out-of-plane blade root bending moments to four wind parameters, representing vertical and horizontal shears and misalignment angles. Improving on this concept, the present work exploits the rotationally symmetric behavior of the rotor in the formulation of the load-wind model. In a nutshell, this means that the effects on the loads of the vertical shear and misalignment are the same as those of the horizontal quantities, simply shifted by <span classCombining double low line"inline-formula">ĝ•2</span>. This results in a simpler identification of the model, which needs a reduced set of observations. The performance of the proposed method is first tested in a simulation environment and then validated with an experimental data set obtained with an aeroelastically scaled turbine model in a boundary layer wind tunnel.

Original languageEnglish
Pages (from-to)89-97
Number of pages9
JournalWind Energy Science
Volume4
Issue number1
DOIs
StatePublished - 8 Jan 2019

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