A hybrid actuator disc - Full rotor CFD methodology for modelling the effects of wind turbine wake interactions on performance

RENEWABLE ENERGY

卷:80

Article

Sturge, D.^1,2  Sobotta, D.²  Howell, R.^1,2  While, A.^1,3  Lou, J.⁴ 

[1] Univ Sheffield, WindNet, Sheffield S10 2TN, S Yorkshire, England

[2] Univ Sheffield, Dept Mech Engn, Sheffield S1 3JD, S Yorkshire, England

[3] Univ Sheffield, Dept Town & Reg Planning, Sheffield S10 2TN, S Yorkshire, England

[4] Fusionopolis, Inst High Performance Comp, Singapore 138632, Singapore

关键词: Wind turbine wake interactions;    Wind turbine array performance;    Computational fluid dynamics;    Actuator disc;    Wind tunnel test;    Hybrid simulation technique;   

DOI  :  10.1016/j.renene.2015.02.053

来源: Elsevier

【 摘 要 】

The performance of individual wind turbines is crucial for maximum energy yield, however, their performance is often reduced when turbines are placed together in an array. The wake produced by the rotors interacts with downstream turbines, resulting in a reduction in power output. In this paper, we demonstrate a new and faster modelling technique which combines actuator disc theory, modelled using wind tunnel validated Computational Fluid Dynamics (CFD), and integrated into full rotor CFD simulations. This novel hybrid of techniques results in the ability to analyse performance when simulating various array layouts more rapidly and accurately than using either method on its own. It is shown that there is a significant power reduction from a downstream turbine that is subjected to the wake of an upstream turbine, and that this is due to both a reduction in power in the wind and also due to changes in the aerodynamics. Analysis of static pressure along the blade showed that as a result of wake interactions, a large reduction in the suction peak along the leading edge reduced the lift generated by the rotor and so reduced the torque production and the ability for the blade to extract energy from the wind. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free