Three dimensional actuator disc modelling ofwind farm wake interaction
2008 (English)In: European Wind Energy Conference and Exhibition, 2008, 1-10 p.Conference paper (Refereed)
Large eddy simulations of the Navier-Stokes equations are performed to achieve a better under-standing of the behaviour of wakes generated by wind turbines. The simulations are performed bycombining the in-house developed computer code EllipSys3D with the actuator-disc methodology.In the actuator-disc method the blades are represented by a disc at which body forces representingthe loading are introduced. The body forces are determined by computing local angles of attack andusing tabulated aerofoil coefficients. The advantage of using the actuator-disc technique is that itis not needed to resolve blade boundary layers and instead the computational resources are devotedto simulating the dynamics of the flow structures. In the present study approximately six millionsmesh points are used to resolve the wake structure in a park containing up to 9 turbines. Theresults from the CFD simulations are evaluated and the downstream evolution of the velocity fieldis depicted. Special interest is given to what extent the production is dependent of inflow angle.The result clearly indicates that turbulent inflow has a strong impact on the result and leads to amore complex flow structure.
Place, publisher, year, edition, pages
2008. 1-10 p.
Actuator disc, Angles of attack, Body forces, CFD simulations, Complex flow structures, Computational resources, In-house developed computer, Mesh points, Velocity field, Wake interactions, Wake structures, Wind farm, Computational fluid dynamics, Electric utilities, Exhibitions, Flow structure, Loading, Navier Stokes equations, Velocity, Wakes, Wind power, Actuator disks
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-9912ScopusID: 2-s2.0-84870035629OAI: oai:DiVA.org:kth-9912DiVA: diva2:158170
European Wind Energy Conference and Exhibition 2008, EWEC 2008; Brussels; Belgium
QC 201007202009-01-302009-01-302015-01-30Bibliographically approved