New dynamic-inflow engineering models based on linear and nonlinear actuator disc vortex models

New dynamic-inflow engineering models based on linear and nonlinear actuator disc vortex models

Yu, W. (TU Delft Wind Energy)
De Tavernier, D. (TU Delft Wind Energy)
Ferreira, Carlos (TU Delft Wind Energy)
van Kuik, G.A.M. (TU Delft Wind Energy)
Schepers, J.G. (TU Delft Wind Energy; ECN Solar Energy)

2019-11

Two new engineering models are presented for the aerodynamic induction of a wind turbine under dynamic thrust. The models are developed using the differential form of Duhamel integrals of indicial responses of actuator disc type vortex models. The time constants of the indicial functions are obtained by the indicial responses of a linear and a nonlinear actuator disc model. The new dynamic-inflow engineering models are verified against the results of a Computational Fluid Dynamics (CFD) model and compared against the dynamic-inflow engineering models of Pitt-Peters, Øye, and Energy Research Center of the Netherlands (ECN), for several load cases. Comparisons of all models show that two time constants are necessary to predict the dynamic induction. The amplitude and phase delay of the velocity distribution shows a strong radial dependency. Verifying the models against results from the CFD model shows that the model based on the linear actuator disc vortex model predicts a similar performance as the Øye model. The model based on the nonlinear actuator disc vortex model predicts the dynamic induction better than the other models concerning both phase delay and amplitude, especially at high load.

actuator disc
CFD
dynamic inflow
engineering model
vortex model

http://resolver.tudelft.nl/uuid:8111cd63-34b0-4084-a452-94a4a911eea5

https://doi.org/10.1002/we.2380

1095-4244

Wind Energy, 22 (11), 1433-1450

Institutional Repository

journal article

© 2019 W. Yu, D. De Tavernier, Carlos Ferreira, G.A.M. van Kuik, J.G. Schepers