Improving actuator disk wake model

• Type: Article in International Conference Proceedings Book
• Date: 2014

Authors

Gomez, VMMGC (Author) Other; José Laginha Palma (Author) FEUP; Lopes, AS (Author) Other

Conference proceedings International

Title: SCIENCE OF MAKING TORQUE FROM WIND 2014 (TORQUE 2014)

Final page: 012170

5th Science of Making Torque from Wind Conference

Copenhagen, DENMARK, JUN 18-20, 2014

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 12 Citations

Other information

Authenticus ID: P-009-NJ9

DOI: 10.1088/1742-6596/524/1/012170

Abstract (EN): The wind energy industry has traditionally relied on simple wake models for estimating Wind Turbine (WT) wake losses. Despite limitations, low requirements in terms of detailed rotor information makes their use feasible, unlike more complex models, such as Blade Element Method (BEM) or Actuator Line. Froude's Actuator Disk (AD) does not suffer the simpler model's limitation of prescribing the wake through a closed set of equations, while sharing with them the low rotor data requirements. On the other hand they require some form of parametrization to close the model and calculate total thrust acting on the flow. An Actuator Disk model was developed, using an iterative algorithm based on Froude's one-dimensional momentum theory to determine the WT's performance, proving to be successful in estimating the performance of both machines in undisturbed flow and in the wake of an upstream machines. Before Froude's AD limitations compared to more complex rotor models, load distributions emulating those of a BEM model were tested. The results show that little impact is obtained at 3 rotor diameters downstream and beyond, agreeing with common definition of a far-wake that starts at 1-2 diameters downstream, where rotor characteristics become negligible and atmospheric flow effects dominate.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10