Volume 60

An actuator line simulation of wind turbine wake with linear upwind stabilizedtransport scheme Yu Cheng, Xiaolong Qiu, Ming Shi, Panpan Lin, Liying Zhang

Abstract

The wake interactions between wind turbines in largewind farms significantly impact optimal layout andpower generation. Therefore, it is crucial to accurateprediction of turbine wake development. In this study,we utilize Large Eddy Simulation (LES) coupled with theactuator line method to investigate the flow of wakesdownstream of a scaled wind turbine model and theNREL 5MW turbine. To improve the accuracy of wake simulations, we propose a novel difference schemecalled the linear upwind stabilized transport (LUST) scheme, which we compare to the second-order centraland upwind schemes. Our results demonstrate that the LUST scheme provides proper numerical dissipation forwind turbine wake simulations, leading to improve accuracy in predicting mean velocity and turbulent intensity when compared to experimental measurements. Furthermore, the LES results indicate that the dissipation introduced by the LUST scheme stabilizes numerical simulations while still capturingsmall scales in the flow field. These findings highlight the effectiveness of the LUST scheme in accurately simulating wind turbine wakes and emphasize the importance of proper numerical dissipation in obtaining reliable results.

Keywords Wind turbine wakes, Large Eddy Simulation,actuator line method, linear upwind stabilized transportscheme