A new dynamic inflow model for vertical-axis wind turbines

De Tavernier, D.A.M.; Ferreira, Carlos

doi:10.1002/we.2480

A new dynamic inflow model for vertical-axis wind turbines

Title

A new dynamic inflow model for vertical-axis wind turbines

Author

De Tavernier, D.A.M. (TU Delft Wind Energy)
Ferreira, Carlos (TU Delft Wind Energy)

Date

2020-05

Abstract

This paper presents a new dynamic inflow model for vertical-axis wind turbines (VAWTs). The model uses the principle of Duhamel's integral. The indicial function of the inflow- and crossflow-induction required to apply Duhamel's integral is represented by an exponential function depending on the thrust coefficient and the azimuthal position. The parameters of this approximation are calibrated using a free wake vortex model. The model is compared with the results of a vortex model and higher fidelity computational fluid dynamic (CFD) simulations for the response of an actuator cylinder to a step input of the thrust and to a cyclic thrust. It is found that the discrepancies of the dynamic inflow model increase with increasing reduced frequency and baseline thrust. However, the deviations remain small. Analysing the application of a finite-bladed floating VAWT with non-uniform loading and validating it against actuator line CFD results that intrinsically include dynamic inflow shows that the new dynamic inflow model significantly outperforms the Larsen and Madsen model (which is the current standard in fully coupled VAWT models) and enhances the modelling of VAWTs.

Subject

actuator cylinder
CFD
dynamic inflow
floating
VAWT
vortex model

To reference this document use:

http://resolver.tudelft.nl/uuid:97140b61-87eb-4217-9dee-4593f5da2b3a

DOI

https://doi.org/10.1002/we.2480

ISSN

1095-4244

Source

Wind Energy, 23 (5), 1196-1209

Part of collection

Institutional Repository