The effective velocity model

An improved approach to velocity sampling in actuator line models

Journal article (2024)

Authors

C. Muscari Politecnico di Milano, Team Jan-Willem van Wingerden - Mechanical, Maritime and Materials Engineering
P. Schito Politecnico di Milano
A.C. Viré Wind Energy - Aerospace Engineering
A. Zasso Politecnico di Milano
J.W. van Wingerden Team Jan-Willem van Wingerden - Mechanical, Maritime and Materials Engineering
Research Group
Team Jan-Willem van Wingerden (Mechanical, Maritime and Materials Engineering) (TU Delft)
CFD LES Wind turbine modeling Actuator line model Regularization kernel Velocity sampling
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Published Date

2024

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Delft Center for Systems and Control

Research Group

Team Jan-Willem van Wingerden

Abstract

Actuator line modeling of wind turbines requires the definition of a free-stream velocity in a computational mesh and a regularization kernel to project the computed body forces onto the domain. Both choices strongly influence the results. In this work, a novel velocity sampling method—the so-called effective velocity model (EVM)—is implemented in the CFD software SOWFA, validated, and compared to pre-existing approaches. Results show superior method robustness with respect to the regularization kernel width ((Formula presented.)) choice while preserving acceptable accuracy. In particular, the power predicted by the EVM is nearly independent of the (Formula presented.) value.